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199 Cards in this Set
- Front
- Back
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The formula used to express the relationships among the sides of a right triangle is called? A Pythagorean constant B Pythagorean law C Pythagorean theorem D Pythagorean hypothesis |
C Pythagorean theorem |
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In a formula, the symbol √ stands for? A Divide by B Square root C Constant D Cube root |
B Square root |
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To calculate the true offset, which of the formulas would you use? A True offset = Rise x Roll B True offset = √(Rise^2 x Roll^2) C True offset = Rise ^2 x Roll^2 D True offset = √(Rise x Roll) |
B True offset = √(Rise^2 x Roll^2) |
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When calculating an offset using 45-degree elbows, ____? A the run and travel are equal length B the rise is twice as long as the run C the rise and run are equal D the run is half the length of the travel |
C the rise and run are equal |
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To calculate the travel when the offset is known, multiply the offset by ___? A the constant squared B the constant C 1/2 the constant D rise plus run times the constant |
B the constant |
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If the two parallel sections of pipe on either end of the offset are not in the same vertical or horizontal plane, the installation is described as a ____. A rolling offset B diverging offset C skewed offset D compound offset |
A rolling offset |
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In a discussion of offsets, "run" is defined as ____. A the vertical distance between the center lines of two runs of pipe B the longest leg of a triangle C the horizontal leg of the right triangle D the length of pipe between the centers of fittings |
C the horizontal leg of the right triangle |
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To calculate a rolling offset, you can use a folding rule and a ____. A laser level B framing square C fitting manufacturer's table D compound square |
B framing square |
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When calculating the length of the pipe to be cut for an offset, ____. A add the fitting allowances to the travel B add the fitting allowances and multiplied by the travel C subtract the fitting allowances from the travel D divide the travel by the sum of the fitting allowances |
C subtract the fitting allowances from the travel |
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A section shows a(n) ____. A horizontal view B hidden portion of the building C vertical view D axial view |
C vertical view |
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A small scale ( such as 1" = 20' - 0") would most often be used for a(n) ______. A plumbing drawing B civil drawing C electrical drawing D HVAC/mechanical drawing |
B civil drawing |
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To obtain needed dimensions when using an architectural drawing, a plumber should ______. A ask the job foreman B measure directly from the drawing C consult the material list D use the scale provided on the drawing |
B measure directly from the drawing |
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Pages of HVAC/mechanical drawings are numbered as _____. A V-1, V-2, and so on B H-1, H-2, and so on C M-1, M-2, and so on D AC-1, A-2, and so on |
C M-1, M-2, and so on |
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Which of the following would not be found on a plumbing plan? A dimensions B water distribution piping locations C riser diagrams D DWV piping locations |
A dimensions |
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Once construction is underway, modifications to the plans are submitted as either ____. A clarifications or RFI's B revisions or change orders C coordination or shop drawings D addenda or appendices |
B revisions or change orders |
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To avoid confusion all drawing submitted with an RFI must include a _____. A north arrow B foreman's signature C compass rose D job number |
A north arrow |
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To locate the plumbing entry points, you should refer to the _____. A plumbing drawing B elevation drawing C floor plan D fixture schedule |
C floor plan |
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Walls that run around the outside of a building are the ______. A partitions B exterior walls C bearing walls D interior walls |
B exterior walls |
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Which of the following would NOT be a skill needed by a plumber? A laying out plumbing systems B roughing in fixtures C calculating structural loads D using different types of drawings and schedules |
C calculating structural loads |
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Plumbing plans may include the supply and DWV systems, shown in the form of ____. A isometric drawings B typing schedules C 3-D diagrams D orthographic drawings |
Isometric drawings |
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Approved submittal data for each fixture must be obtained, before roughing in, from ___. A the job foreman B the contractor or owner C the code administrator D the purchasing agent or project manager |
D the project manager or purchasing agent |
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Coordination drawings are usually prepared _____. A by the architect B for commercial projects C as part of a bid package D for residential projects |
B commercial projects |
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Every change made during the building process will be reflected in the ___. A corrected drawings B civil drawings C as-built drawings D architectural drawings |
D architectural drawings |
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Which of the following is NOT a feature of building information modeling? A seeing, before construction begins, how it completed building will look B identifying potential conflicts or problems C estimating construction costs D predicting weather related delays |
D predicting weather related delays |
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A list that includes all fixtures, pipe, fittings, and other items needed for a project, as well cost estimates, is called a (n) _____. A material take off B project schedule C material cost reconciliation D inventory item take off |
A material takeoff |
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In Figure 1, which number identifies the building drain? A 1 B 2 C 3 D 4 |
D 4 |
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Which of the following drawing names is based on the Latin word that mean "equal measurement"? A orthogonal B isometric C orthorhombic D isochronic |
B isometric |
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In an isometric drawing, horizontal lines are projected at an angle of _____. A 15 degrees B 30 degrees C 45 degrees D 60 degrees |
B 30 degrees |
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Project specifications are written by ______. A the owner B fixture manufacturers C to e architect or engineer D contractors and subcontractors |
C the architect and the engineer |
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Which of the following is NOT a common method of modifying structural members? A drilling B chamfering C notching D boxing |
B chamfering |
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What is the closest distance a whole can be drilled to the end of a joist? A 12 in B 8 in C 6 in D 4 in |
C 6 in |
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When boxing a floor joist, the double header can be reinforced by _____. A installing strap hangers B using lag screws C doubling the adjacent joists D fitting a metal bridge |
A installing strap hangers |
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Elastomeric cellular thermal installation is the technical name for ______. A fiberglass insulating material B foam in place insulation C rigid foam tubing D flexible foam insulation |
D flexible foam insulation |
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Fiberglass insulation comes from the manufacturer in _____. A preslit 3 ft lengths B flat sheets to be formed around the pipe C 3 ft by 50 ft rolls D preslit 6 ft lengths |
A preslit 3 ft lengths |
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When the ambient temperature is below 50° f, the self-sealing lap of fiberglass pipe insulation should be _____. A warmed with the heat gun B sealed with duct tape C reinforced with flared staples D filled with a vapor barrier adhesive |
C reinforced with flared staples |
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Gaps where self-sealing laps did not seal properly our referred to as ______. A breaks B fish mouths C mouse holes D fish tails |
B fish mouths |
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Joints between sections of flexible foam pipe insulation are sealed with a (n) ______. A self-adhesive butt strip B ultrasonic welder C strip of duct tape D brush on adhesive |
D brush on adhesive |
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Which of these insulating methods would normally be used for underground chilled water pipe? A flexible foam tubing B expanded foam jacketing C a pre-insulated pipe system D fiberglass pipe insulation |
C a pre-insulated pipe system |
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Penetrations in fire rated concrete floors are often sealed with _______. A cast in place fire stops B fire stop putty C asbestos mortar D fire stopping collars |
B fire stop putty |
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The abbreviation DWv stands for _____. A digital water valve B drain, water and vent C drain, waste, and vent D double water volume |
C drain, waste, and vent |
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Which of the following statements is true? A it is more difficult to route DWV piping around water supply piping then vice versa B the grade used for water supply piping is not important C the grade used for DWV piping is not important D it is more difficult to route water supply piping around DWV piping than vice versa |
D it is more difficult to wrap water supply piping around DMV piping than vice versa |
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To calculate the load factor for a DWV system, you can use information contained in the ____. A plumbing handbook B applicable local codes C floor plans D materials takeoff |
B applicable local codes |
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Drainage and waste piping systems must be installed ________. A below the frost line B at a slope greater than 30° C at a specified, constant grade D by a master plumber |
C at a specified, constant grade |
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A general-purpose level can be used to provide _______. A the same accuracy as a plumb bob or laser level B it precise calculation of grade C inaccurate estimate of distance between level points D a very rough approximation of grade |
D a very rough approximation of grade |
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How can a general- purpose level be modified to make it more accurate for grade measurements? A extended length with the wood lath B attach a suitably sized wood block to one end C weld a piece of rebar to one end D attach an additional bubble valve at the desired angle |
B attach a suitably size wood block to one end |
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What kind of transit level do that a builders level cannot? A tilt upward to measure angles from the vertical B provide digital readouts C rotate horizontally to measure angles D be properly leveled on a sloping site
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A tilt upward to measure angles from the vertical |
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A vernier scale, used to make more precise readings, is found on a _______. A laser level B stadia rod C steel tape D builders level |
D builders level |
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When setting up a builder's level, the leveling screws should be ________. A backed out fully, then adjusted individually B turned on opposite directions C rotated counterclockwise D tightened as far possible, then backed off as necessary |
B turned on opposite directions |
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Which of the following statements about the cold beam laser level is NOT true? A the light beam is perfectly straight B it projects a beam of ultraviolet light C the light beam does not expand appreciably D you should not look directly into the light beam, even though it is considered harmless |
B it projects a beam of ultraviolet light |
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To protect the pipe that will pass through a concrete footing, install a(n) _____. A insulation boot B sleeve C buffer D expansion joint |
B sleeve |
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Which of the following is not a condition that must be met before you begin to install a DWV system? A the plans must be approved B the building inspector must be notified C all appropriate permits have been pulled D all fixtures have been sized |
B the building inspector must be notified |
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To move liquid and solid wastes to the point of disposal, DWV piping must be installed at a slope. This slope is called the ______. A grade B pitch C run D anticline |
A grade |
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If grade is not specified in the construction drawings, the project specifications, or the local applicable code, it can be obtained _____. A from the project engineer B by measuring with a builders level C from the site manager D from the local plumbing inspector |
D from the local plumbing inspector |
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If a benchmark cannot be located, you will have to ______. A ask the architect to identify one B locate some other point of known elevation C resurvey the entire job site D use a GPS equipped builders level |
B locate some other point of known elevation |
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Which of these formulas is used to calculate fall and a piping installation? A grade ÷ run B grade x run C grade + run D grade - run |
B grade x run |
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The string stretch taunt across the planned piping group at the desired slope is called a(n)______. A grade line B slope indicator C leveling line D invert line |
A grade line |
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Which of the following is NOT a consideration when determining the exact location of the main stack? A cost efficiency B direction and path of pipe from fixtures C public sewer depth D ease of installation |
C public sewer depth |
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When installing the plumbing stack, you would NOT bore a hole in which of the following building members? A top plate B ceiling joist C roof sheathing D sole plate |
C roof sheathing |
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The stack that must extend above the high side of the roof by a minimum of _____. A 2 ft B 18 in C 1 ft D 6 in |
D 6 in |
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At the point where the staff penetrates the roof, vent flashing is installed to _____. A prevents sewer fumes from igniting B improve the appearance of the stack C prevent rainwater from entering the building D insulate the joint between the stack and the roof |
C prevent rainwater from entering the building |
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When connecting fixture drains, after cutting the pipe to the correct length, assemble the branch line starting from the _____. A fixture trap B narrowest fitting C sanitary tee D widest fitting |
C sanitary tee |
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Rough-in measurements for fixtures to be installed must be approved by _____. A the architect or engineer B the local code authority C the building inspector D the job foreman |
The architect or engineer |
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Which of the following statements about fiberglass tub and shower fixtures is NOT true? A they must be in place during construction B they have rough-in measurements that allow for wall board thickness C they can be damaged by exposure to sunlight and weather D they must be installed before framing is completed |
B they have rough-in measurements that allow for wall board thickness |
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The purpose of an invertible base plate on a commercial water closet carrier is to ____. A allow the carrier to be installed upside down B protect the carrier against damage C ensure level placement while maintaining pitch in the drainage line D permit the use of the carrier in a back-to-back installation with multiple water closets on a branch |
C ensure level placement while maintaining pitch in the drainage line |
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When building commercial restrooms back to back, hook up the fixtures and the adjacent restrooms by applying ______. A plastic faceplates to lateral members B auxiliary face plates to lateral members C interchangeable faceplates to the lateral members D multiple face plates to the lateral members |
B auxiliary face plates to lateral members |
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A negative aspect of lavatory carriers designed to be mounted directly on stud walls or masonry walls is ______. A poor structural strength B difficulty of installation C high cost D unattractive appearance |
A poor structural strength |
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A pipe sealing device that blocks fitting openings by expanding a rubber gasket is called a (n) _______. A screw type test plug B hydraulic test plug C inflatable test plug D mechanical test plug |
D mechanical test plug |
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A water test requires the water level and pipes to remain stationary for 15 minutes with the system subjected to a pressure of at least ______. A 5 lbs of water B 10 ft head of water C 15 lbs of water D 20 lbs of water |
B 10 ft head of water |
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Why are floor drains connected to the sanitary sewer system? A because of the small volume of waste entering them B Because the wastes entering them are usually contaminated C because the wastes entering them contain many solids D because of the large volume of wastes entering them |
B because the wastes entering them are usually contaminated |
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Inside-caulk drain bodies are compatible with ____. A hub-and-spigot cast-iron pipe B threaded stainless steel pipe C compression joint cast-iron pipe D sweat jointed copper tube |
A hub-and-spigot cast iron pipe |
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For special applications, a drain body might be made of ____. A chromium\nickel B fiberglass reinforced composite C concrete D stainless steel |
D stainless steel |
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A floor drain often may be set to the proper grade without an extension, because _____. A The drain bodies are telescoping B The strainers are threaded C The drains contain a built-in extension D The strainers have long necks |
B The strain is are threaded |
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Which of these devices would be used to secure a waterproof membrane to the drain body? A flashing clamp B drain receiver C deck clamp D fabric retainer |
A flashing clamp |
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Which of the following statements about plumbing codes is NOT true? A they determine the appropriate sizes for drains B they specify exact locations of drains C they govern the installation of floor drains D they specify the number of drains required for a given surface area |
B they specify is that location of drains |
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Instead of a floor drain, a hospital or restaurant installation may include the installation of a _____. A catch basin B flushable drain C floor sink D sanitary inlet |
C floor sink |
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A waterproof membrane must be placed between the structural concrete floor in the topping slab when the floor drain is located _____. A above ground level B in a garage C in a basement D below ground level |
C in a basement |
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Which of these statements about roof drains is true? A Location of the drain is not critical B installation is different from the procedure used on the floor drains C installation is similar to the procedure used for floor drains D flashing a seldom necessary |
C installation is similar to the procedure used for floor drains |
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Secondary drains require a separate drainage system that ______. A Discharges above grade B discharges below grade C connects with the primary drainage system prior to connecting to the main sewer line D is located outside of building occupants and maintenance personnel |
A discharges above grade |
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A wooden or metal form used to create a wood drain opening and a poured concrete that is called a _____. A retainer B pass-through C box-out D penetration |
C box-out |
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A drain receiver is used to support the drain by _____. A when the installation will be exposed to freezing temperatures B when it is installed over a rigid insulation C on decking less than 1 inch thick D when the elevation must be adjusted |
D when the elevation must be adjusted |
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A plastic drain body can be connected to a piping system by solvent it welding or the use of a _____. A threaded joint B compression joint C expansion joint D caulked joint |
A threaded joint |
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A plastic drain body can be connected to a piping system by solvent it welding or the use of a _____. A threaded joint B compression joint C expansion joint D caulked joint |
A threaded joint |
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A roof drain installation may sometimes filter rainwater runoff through _____. A HEPA filter B particle in foreign matter strainers C a drain field D Sand and oil interceptors |
D sand and oil interceptors |
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The device shown in figure 1 is a (n) _______. A primary roof drain B secondary roof drain C adjustable flow roof drain D roof drain with sediment bucket |
C adjustable flow roof drain |
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Siphonic Roof drains prevent air from entering the drain system by using a(n) _____. A water-filled trap B air baffle are the inlet C back flow preventer D pressure valve at the outlet |
B air baffle at the inlet |
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Loss of correct elevation on an adjustable flow roof drain may be caused by ____. A someone stepping on the drain B high barometric pressure C concrete roof deck expansion D improper installation |
A someone stepping on the drain |
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A material that is widely used for shower pans is ______. A fiberglass reinforced acrylic B PVC reinforced fiberglass C enamel coated iron D resin backed fiberglass |
A fiberglass reinforced acrylic |
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To reduce the risk of water damage when installing a shower, install a waterproof membrane _______. A before installing the drain body B over the shower structural supports C Through the hole in the center of the shower floor D when the drain base has been covered |
B Over the showers structural supports |
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A common slope for a shower subfloor, measured from the wall framing to the edge of the drain base, is ____. A 1/4” per ft B 1/3” per ft C 1/2” per ft D 3/4” per ft |
A 1/4” per ft |
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A trap primer prevents flow of the trap seal due to _____. A sublimation B joint failure C coagulation D evaporation |
Evaporation |
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Concrete storm drainage pits used in multi story parking structures, auto repair garage, or other facilities are called _____. A trench drains B floor sink C graded drains D flood sumps |
C graded drains |
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Which of the following is NOT a water meter measurement capacity? A 10 gpm B 20 gpm C 30 gpm D 50 gpm |
A 10 gpm |
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The amount of water that does not flow into a municipal sewer system is measured by a ____. A subtractive meter B compensating meter C deduct meter D negative balance meter |
C deduct meter |
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A building's water heater should be located _____. A according to the working drawings B on an outside wall C in the laundry room D below grade level |
A according to the working drawings |
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Reference dimensions that can be used to help locate water supply piping can be found in the _____. A plumbing drawings B approved submittal data C RFI D fixture schedule |
A plumbing drawings |
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Which of the following types of plastic pipe CANNOT be used for water service? A PEX B CPVC C PE D PB |
D PB |
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Water softeners are NOT required to be connected to a _____. A cold water line B hot water line C line serving a hose bib D line servicing a kitchen sink |
C line servicing a hose bib |
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Rate of flow in water supply piping is measured in by _____. A gallons per minute B gallons per hour C cubic feet per minute D cubic feet per hour |
A gallons per minute |
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Sizing tables showing the WSFUs for residential fixtures are found in _____. A the specifications B plumbing handbooks C local codes D manufacturers catalogs |
C local codes |
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A curb box provides access to a ______. A corporation stop B water meter C curb stop D water main |
C curb stop |
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To ensure Frost protection when installing water supply piping, _______. A run lines along exterior walls B insulate water supply pipes that run inside exterior walls C open crawl space vents during the winter season D run piping close to crawl space vents |
B insulate water supply pipes that run inside exterior walls |
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Before you install each fixture, confirm the stub out dimensions, using ______. A plumbing drawings B manufacturers specifications C approved submittal data D isometric drawings |
C approved submittal data |
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Water hammer is caused by ______. A multiple faucets open at one time B the sudden closing of a valve C the sudden opening of a valve D sediment buildup in the water heater |
B the sudden closing of a valve |
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A hydrostatic test checks for leaks in a water supply piping system using _____. A nitrogen B smoke C water D peppermint oil |
C water |
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You are conducting a hydrostatic test on a water supply piping system with water next step is to ______. A open valves at low points in the system B open valves at high points in the system C using air compressor to increase the pressure D use an air compressor to decrease the pressure |
B open the valves at high points in the system |
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The part of the pipe that extends beyond the finished wall is called a(n) _______. A cap B finial C extension D stub out |
D stub out |
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To position riser and stub out assemblies firmly in their permanent location, use ____. A a riser clamp B a pipe clamp C a drop ear ell or a high ear ell D a strut support or vertical hanger |
C a drop ear ell or a high ear ell |
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Water supply piping should be leak tested ______. A after each fixture is connected B before the walls are closed C after the walls are closed D before the piping is connected to the main |
B before the walls are closed |
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Test caps (plugs) are NOT recommended for use with which type of pipe? A cast iron B PVC C copper D steel |
C copper |
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If the backflow prevention specified on the construction drawings differs from what is recommended in your local applicable code, you should submit a(n) _______. A clarification B addendum C change order D RFI |
D RFI |
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To prevent freezing, underground water supply pipes should be located, if possible, under _____. A sidewalks B lawns C driveways D patio |
B lawns |
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Which type of valve allows for flow to be shut off quickly by a small movement of a lever or other control? A straight-through flow B full flow C throttled flow D check |
B full flow |
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Any stuffing box, the packing is pressed against the stem by a(n) _______. A end connection B stem retainer C valve bonnet D follower |
C valve bonnet |
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A split wedge gate valve is a good choice for lines that transport _______. A cold water B hot water C steam D slurries |
A cold water |
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When periodic disassembly of the valve is NOT required, the type of basic bonnet used is the _______. A bolted bonnet B union bonnet C screwed bonnet D molded bonnet |
C screwed bonnet |
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Relief valves are typically used for service with _______. A low-pressure gas B liquids C high-pressure steam D steam |
B liquids |
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Ball cocks are also known as ________. A flush valves B flushometer valves C float-controlled valves D T/P valves |
C float-controlled valves |
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Electric flushometers trigger the flushing action with a (n) _________. A push button B infrared device C speed sensor D float gauge |
B infrared device |
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If on-off service is required, do not select a _______. A gate valve B butterfly valve C ball valve D globe valve |
A gate valve |
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A valve rated for use in the petroleum industry would be most likely to have which of the following letter combinations printed on the valve body? A OG B GW C WS D SL |
A OG |
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Valves for low-pressure steam are made of ______. A bronze B iron C aluminum D stainless steel |
A bronze |
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Teflon is often used to form ______. A valve stems B valve bodies C o-ring seals D compression washers |
D compression washers |
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All of the following are advantages of using stainless steel valves EXCEPT their ______. A high cost B high integrity at low temperatures C high resistance to corrosive substances D prevention of contamination to fluid flowing through the line |
A high cost |
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Information on valve ratings is NOT found in ____. A specifications B plan legends C approved submittal drawings D model codes |
A specifications |
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You should never attempt to repair a valve that is ______. A incorrectly rated B used with corrosive materials C under pressure D in a confined space |
C under pressure |
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When servicing a valve, avoid using pliers because _____. A they can slip and cause hand injuries B they can damage the valves finished surface C they do not provide enough torque D they can strip valve threads |
B they can damage the valve finished surface |
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The gate valve that shows signs of wire drawing ______. A can be easily fixed with the refacing tool B should be repaired promptly C must be replaced D will not open fully |
C must be replaced |
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When installing a float controlled valve, ensure that the gasket is in place against the flange before _______. A placing the riser and coupling nut on the base of the float valve B lowering the threaded base through the bottom hole in the water closet tank C placing the washer and nut on the base of the assembly on the outside of the tank and tightening D shaping the riser to a line with the shut-off valve |
B lowering the threaded base through the bottom hole in the water closet tank |
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Flow reversal in a piping system is prevented by which category of valve? A straight through flow B check C full flow D throttled flow |
B check |
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When compared with other types of bonnets, bolted bonnets are good choice for ____. A low cost installations B high pressure lines C smaller valves D applications requiring frequent disassembly |
B high pressure lines |
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For piping applications where valves must be changed frequently for repair or replacement, it is best to install valves with ______. A soldered ends B flanged ends C internal threads D external threads |
B flanged ends |
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A valve that is designed to carry gasoline is marked on the valve body with the letter ______. A G B L C O D S |
A G |
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In a valve rating, the letter L indicates _________. A low pressure liquids only B left-handed operation C light duty D liquid other than water |
D liquid other than water |
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For the purposes of repair work, angle valves and compression faucets can be grouped with ______. A gate valves B globe valves C flushometers D flush valves |
B globe valves |
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Which of the problems listed below is commonly found in flushometers? A the bonnet threads are stripped B the vacuum breaker has failed C the valve seat is worn D the pressure regulator is malfunctioning |
B the vacuum breaker has failed |
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When servicing a flow controlled valve, do NOT adjust the float Ball by bending the float arm because ________. A the rod may become weakened, causing it to snap off after repeated use B the rod May rub repeatedly against the tank, causing it to wear out C the rod may cause the flapper valve to seat improperly, causing a slow leak D the rod May rotate a half turn, causing the tank to overflow |
D the rod May rotate a half turn, causing the tank to overflow |
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When fixtures are delivered to the job site, they should be stored in a location that is secure and ______. A close to the place where they were delivered B as far away from power tool operations as possible C close to the point of installation D near the entrance of the job site |
C close to the point of installation |
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Fixture installation is often called ______. A closing up B finish work C detailing D project wrap up |
B finish work |
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The plumber should always verify the correctness of the _____. A approved submittal data B delivery instructions C rough-in dimensions D fixture specifications |
C rough-in dimensions |
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The ADA requires that clearance around the water closet is at least ______. A 24 in B 36 in C 42 in D 60 in |
D 60 in |
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In a handicap accessible shower, hand shower controls must allow water flow to be stopped by ______. A twisting the control B releasing the control C pressing a release button D squeezing the control |
B releasing the control |
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The threads on threaded valves are ______. A opposite B wider C external D internal |
D internal |
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An example of a fixture that is installed during the rough-in phase of a project is a _____. A bathtub B lavatory C water closet D sink |
A bathtub |
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When installing a fiberglass tub unit, hidden cracks might result from _____. A storage in extreme cold B bending C dropping D storing on edge |
B bending |
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On a check valve, the direction of fluid flow is indicated by ______. A the words "IN" and"OUT" B color coding on the inlet side C an arrow D a numeric code |
C an arrow |
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Solvent welding is used to install valves in a water system using pipe made of _______. A rigid plastic B copper C stainless steel D galvanized iron |
A rigid plastic |
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Not compression faucets regulate water flow by using _____. A flexible diaphragms B movable discs C fixed discs D sliding wedges |
B movable discs |
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Damage resulting from failure of internal and external threads to mesh properly is called _____. A thread stripping B jamming C cross threading D crimping |
C cross threading |
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Diaphragm and piston are the available types of which valve used in water closets? A backflow preventer B flush valve C flushometer D float-controlled valve |
C flushometer |
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Identify letters A - C |
A pop up plug B clevis C lift rod assembly |
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Local codes often do not permit plumbers to make electrical connections to the _____. A dishwasher B clothes dryer C clothes washer D food disposer |
B clothes dryer |
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The connection between a washer drain hose and a stand pipe must be _______. A be airtight B use a compression fitting C be lower than the washer drain outlet D not be airtight |
D not be airtight |
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When installing a refrigerator, connect the cold water line to the water connection on the back of the refrigerator with tubing that is _______. A 1/2" OD B 1/2" ID C 1/4" OD D 1/4" ID |
C 1/4" OD |
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When installing a washing machine, the drain hose should NOT be allowed to drain into a ______. A sink B standpipe C laundry tub D floor drain |
B standpipe |
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When installing a washing machine, the drain hose should NOT be allowed to drain into a ______. A sink B standpipe C laundry tub D floor drain |
B standpipe |
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Identify letters A - E |
A thermostat B T/P relief valve C flue D cold water inlet E heating unit |
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The mineral crust that builds up on the inside of a water heater storage tank is called ______. A plaque B leachate C scale D detritus |
C scale |
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The size of the storage tank to be installed depends on ______. A whether the tank is vertical or horizontal B peak demand for hot water in the building C the building's Butler Ward rating D OSHA regulations |
B peak demand for hot water in the building |
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Incoming cold water is delivered to the bottom of the storage tank by the _______. A dip tube B injector C cold water inlet D pilot tube |
C cold water inlet |
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Gas water heaters that draw combustion air from outside through an intake pipe are called ______. A aquastat water heaters B FVIR water heaters C condensing water heaters D immersion water heaters |
C condensing water heaters |
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FVIR stands for _____. A fuel vapor intake relief B flammable vapor ignition resistant C flame resistant valve installation requirement D fuel velocity indicator readout |
B flammable vapor ignition resistant |
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To heat water in the storage tank, electric water heaters use _____. A baffles B immersion elements C thermocouples D a main burner |
B immersion elements |
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Water heated by a solar collector circulates through the solar system by means of a pump or by _______. A conduction B radiation C diffusion D convection |
D convection |
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What is the minimum amount cubic feet of airspace required around a heat pump water heater? A 1500 B 1000 C 750 D 500 |
B 1000 |
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A danger in gas fired water heaters is an explosion caused by _____. A tank defect B solenoid failure C overpressure D improper venting |
D improper venting |
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The temperature of water provided by a tankless heater can exceed 140° f only if ______. A the customer requests a higher setting B a mixing valve is installed C the household has no small children D protective valves are installed |
D protective valves are installed |
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The pipe fitting identified by the letter A is a(n) _______. A union B compression fitting C coupling D reducer |
A union |
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When installed in a location other than a basement, a water heater must be placed on a(n) ______. A metal riser B security stand C safety pan D abestos pad |
C safety pan |
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In open geothermal systems, a desuperheater is a device that discharges excess heat from a heat exchanger in a(n) _________. A indirect water heater B tankless water C electric water heater D condensing water heater |
A indirect water heater |
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That's water heaters must be properly vented to remove _______. A nitrous oxide B carbon monoxide C hydrogen dioxide D carbon dioxide |
B carbon monoxide |
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The higher the voltage, the greater the _______. A wattage B amperage C current D resistance |
C current |
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Working safely is the responsibility of A the job foreman B the individual worker C the OSHA inspector D the company's safety director |
B the individual worker |
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Meters that require the user to interpret a scale are called ______. A analog meters B reflective meters C digital multimeters D indirect meters |
A analog meters |
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Resistance measurements are always made with the system power shut off because _____. A a more accurate reading can be made B the ohmmeter has its own voltage source C of the danger of a ground fault D meters do not have fuses |
B the ohmmeter has its own voltage source |
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The type of circuit reading that must be made with power applied is the _______. A current B resistance C voltage D power |
C voltage |
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In single phase electrical power, the number of times per second that the voltage fluctuates between positive and negative is ________. A 30 B 60 C 120 D 240 |
B 60 |
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Resistant values expressed in thousands of ohms are expressed using the abbreviation _______. A K B O C M D R |
A K |
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To calculate a resistance value using Ohm's law _______. A divide E by R B multiply E by I C divide E by I D divide E by R |
C divide E by I |
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The amperes of current that will be drawn by a 2,500 watt heater connected to a 120V circuit are ______. A 10.4 B 13.5 C 16.2 D 20.8 |
D 20.8 |
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One horsepower is equal to ______. A 74.6 watts B 330 watts C 746 watts D 3330 watts |
C 746 |
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In a ladder diagram, the lines from the power source are shown as _____. A horizontal lines B vertical lines C diagonal lines D dashed lines |
B vertical lines |
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Nearly all load circuits, such as household circuits, are wired in _____. A parallel B series C three-phase D series parallel |
A parallel |
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The most common loads found in plumbing systems are ______. A electric heaters B switches C electric motors D transformers |
A electric heaters |
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Which of the following is NOT a control device? A solenoid B fan motor C thermostatic switch D circuit breaker |
B fan motor |
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When testing a gas piping system for leaks fill the pipe with air or gas, apply soap and water to the connections, and ______. A watch for bubbles B listen for hissing sound C watch for dripping water D sniff for gas odor |
A watch for bubbles |
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Natural gas usage is measured and sold by the ______. A gallon B cubic inch C pound D cubic foot |
D cubic foot |
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The temperature at which fuel oil ignites is called ______. A explosive index B flash point C evaporative level D trigger point |
B flash point |
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Galvanized steel pipe is protected from corrosion by it with _______. A zinc B mercury C chromium D lead |
A zinc |
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Because modern buildings are often sealed air tight, combustion air for fuel burning appliances typically must be supplied through the use of ______. A attic louvers B infiltration C ducting outside air D louvers in a crawl space under a house |
C ducting outside air |
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If black iron pipe is used in underground installations, it must be coded, wrap, and ______. A galvanized B cathodically protected C insulated D dielectrically isolated |
B cathodically protected |
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Underground steel pipe used for gas must have a protective coating on vertical sections of pipe that extends above the finished grade this coating must extend a minimum of _____. A 1 in B 2 in C 3 in D 4 in |
B 2 in |
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Devices used to shut off the flow of gas when pipes or hose lines break are called _____. A relief valves B excess flow valves C T/P valves D overpressure valves |
B excess flow valves |
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A red color on a gas meter index indicates a gas pressure of ______. A less than 1 lb B 2 lbs C 5 lbs D more than 10 lbs |
C 5 lbs |
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To protect buried steel pipes from corrosion, connect them to a(n) _______. A anode B negative ion generator C ground rod D cathode |
A anode |
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In a gas meter, the flexible sheet of material that moves in direct proportion to the amount of gas flowing through the meter is called the _____. A vane B wobble plate C diaphragm D venturi |
C diaphragm |
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An underground container for LP gas must be set so its top is _______. A one foot above ground B one foot below the ground C 2 ft above the ground D 2 feet below the ground |
D 2 feet below the ground |
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Leak testing of gas piping inside a structure is conducted with a device called a _____. A gasometer B manometer C multimeter D pedometer |
B manometer |
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LP gas piping should be graded toward the storage tank at a slope of at least ______. A 1/4 in per foot B 1/2 in per 10 ft C 1/4 inch per 10 ft D 1/2-in per foot |
B 1/2 in per 10 ft |
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In the event of a fuel oil leak, the risk of a fire or explosion is small when it is at the lowest levels of concentration that can be detected by ______. A sight B carbon monoxide detectors C smell D chemical sensors |
C smell |
