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112 Cards in this Set
- Front
- Back
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What percentage of propane tank capacity is reserved to prevent overpressure from expansion? A. 10% B. 20% C. 50% D. 80% |
B. 20% |
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What test must be performed each time a system is opened? A. System leak B. Propane delivery C. Time pressure drop D. Regulator lockup |
C. Time pressure drop |
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When purging a 20# propane cylinder what is the minimum distance to an ignition source? A. 5 ft B. 15 ft C. 25 ft D. 35 ft |
C. 25 ft |
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A service shut-off valve should only be closed with A. An adjustable wrench B. A socket wrench C. Hands D. A short lever |
C. Hands |
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A type I (CGA 791) valve should A. Never be fitted with a dust cap B. Never be closed with a POL plastic plug C. Be used when filling an ASME tank D. Be used on quick disconnect containers |
B. Never be closed with a POL plastic plug |
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A. Filling a propane cylinder |
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Front (Term) |
D. To indicate the maximum liquid level |
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14 inches of water column is the? A. Minimum propane system pressure B. Maximum depth of a liquid within container C. First stage regulator pressured D. Maximum lock up regulator pressure |
D. Maximum lock up regulator pressure |
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What reduces propane container pressure to 10 PSI? A. First stage of a regulator B. Second stage of a regulator C. Maximum flow valve D. Pressure relief valve |
A. First stage of a regulato |
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For each 10 degress propane liquid is warmed its volume? A. Decreases 10% B. Decreases 1.5% C. Increases 1.5% D. Increases 10% |
C. Increases 1.5% |
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Approximate number of BTUs in a 20 pound propane cylinder? A. 150,000 B. 275,000 C. 345,000 D. 960,000 |
345,000 You get it by taking a 20 pound propane bottle times that by .8 then times that by 21,548 BTU 'a refer to card 13 |
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Back up wrenches are used? A. To help break free rusted fasteners B. To prevent damage to propane connections C. Keep bolts from turning during installation D. When primary tools are in use |
B. To prevent damage to propane connections |
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When filling a propane container 25 feet is the? A. Minimum distance to the nearest building B. Maximum distance to a fire extinguisher C. Minimum distance to an ignition source D. Required length of the fill hose |
C. Minimum distance to an ignition source |
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When transporting a DOT propane cylinder you should? A. Install a dust cap B. Never place in the trunk C. Lay cylinder on the side and block from rolling D. Open service valve to assure tank is empty |
A. Install dust cap |
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-44°F is? A. The temperature propane liquid freezes B. Absolute zero C. Maximum vapor temperature D. The boiling point of propane |
D. The boiling point of propane |
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What is the weight of five liquid gallons of propane? A. 21 pounds B. 42 pounds C. 442 ounces D. 24 pounds |
A. 21 pounds |
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A pound of liquid propane at 60°F? A. Weighs 14 ounces B. Contains 21,548 British thermal units C. Expands to 36.38 ft.³ of vapor D. Is under 196 PSI pressure in a closed container |
B. Contains 21,548 BTU's |
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What is the maximum percentage of propane vapor in the atmosphere that will ignite? A. 2.15% B. 9.6% C. 11% D. 100% |
B. 9.6% |
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The chemical that gives propane its odor is? A. Butane B. Ethylene C. Magnesium sulfate D. Ethel mercaptan |
D. Ethel mercaptan |
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Temperature of a propane container affects the? A. Flow of vapor from the container B. Number of BTUs available C. Range of combustibility D. Boiling point |
A. Flow of vapor from the container |
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When the pressure in a container is near zero as a result of cooling from use it? A. Has out run the rate of vaporization B. Is undersized for the application C. Has reached pressure inversion D. Is in thermal in balance |
A. Has out run the rate of vaporization |
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Propane gas released into the atmosphere is? A. Unacceptable B. Greenish in color C. Condensed into a liquid D. Invisible |
D. Invisible |
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Pressure inside of a propane container varies with? A. Temperature B. Size of container C. Liquid level in container D. Pressure relief valve setting |
A. Temperature |
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The department of transportation DOT? A. Certifies propane tanks B. Regulates propane cylinders C. Controls interstate transport of containers D. Overseas propane retailers |
B. Regulates propane cylinders |
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The American Society of mechanical engineers(ASME)? A. Overseas the recertification of cylinders B. Controls manufacturing of containers C. Regulates propane tanks D. Certifies propane cylinders |
C. Regulates propane tanks |
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Before filling a propane cylinder you must check the? A. Capacity in gallons B. Date of manufacture C. Tare weight D. Paint condition |
B. Date of manufacture |
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The data plate on a ASME tank does not specify? A. Gallons of water capacity B. Tare weight C. Maximum allowable working pressure D. Overall diameter |
B. Tare weight |
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Propane containers must be mounted to the RV so they will not become dislodged when force equal to _____ times the filled container weight is applied in any direction? A. 2 B. 4 C. 6 D. 8 |
D. 8 |
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Another name for a J-tube? A. Vapor withdraw tube B. Dip tube C. Suction tube D. Filler tube |
A. Vapor withdraw tube |
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What information is not found on the protective collar of a DOT cylinder? A. Initials of the inspector B. Name of manufacturer C. Dip tube length in inches D. Propane capacity in pounds |
D. Propane capacity in pounds |
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What component is not connected directly to the service valve on a DOT cylinder? A. Dip tube B. Outage port C. Relief valve D. Excess flow check valve |
D. Excess flow check valve |
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Component that prevents the accumulation of excess moisture on the regulator diaphragm is called the? A. Outage port B. Relief mechanism C. Vent D. Bonnet |
C. Vent |
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Propane gas is A. Twice as light as air B. .5 times heavier than air C. Equal in weight to air D. 1.5 times heavier than air |
D. 1.5 times heavier than air |
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11" water column is the A. Vapor pressure in a propane bottle at 0°F B. Maximum pressure indicated by a dial type Manometer C. Correct pressure coming from the second stage of a propane regulator D. Propane regulator lock up pressure |
C. Correct pressure coming from the second stage of a propane regulator |
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What must be disconnected when performing a time pressure drop test using a propane system test kit A. Range burner B. Low pressure line C. Appliance regulator D. Automatic changeover |
B. Low pressure line |
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While performing a regulator lock up test, the propane pressure exceeds 14 inches water column. You must A. Adjust the lock up pressure by turn of the screw counter clockwise B. Adjust the lock up pressure by turning the screw clockwise C. Replace the regulator D. Open the bypass valve on the propane test apparatus |
C. Replace the regulator |
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A propane lock-up test requires _______ vapor flow? A. 0% B. 25% C. 50% D. 75% |
A. 0% |
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On a correctly adjusted propane system, a operating pressure test will show ______ inches water column A 8 B. 10 C. 11 D. 14 |
C. 11 |
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What percentage of the normal BTU demand is required to perform a propane operating pressure test A. 0% B. 25% C. 50% D. 75% |
C. 50% |
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When burn testing an appliance a properly adjusted flame A. Is blue with soft inner Cone B. Is blue with yellow orange cone C. Will make roaring sound as it burns D. Has bright yellow tips |
B. Is blue with soft inner Cone |
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When connecting or disconnecting a propane line at an appliance, you should use A. Channel locks B. Adjustable wrenches C. Pliers D. Two open end wrenches |
D. To open end wrenches |
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Which of the following two resources are the source of propane gas in the refining process A. Natural gas in kerosene B. Natural gas and crude oil C. Crude oil on kerosene D. Crude oil and oxygen |
B. Natural gas and crude oil |
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What is the boiling temperature of propane at sea level A. 15°F B. -12°F C. -22°F D. -44°F |
D. -44°F |
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At what intervals are ASME tanks required to be recertified? A. Every 5 yrs B. Every 10 yrs C. There is no requirement to recertify D. Whenever the service valve or other appurtenance is replaced |
C. There is no requirement to recertify |
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When the temperature increases, propane will A. Freeze B. Expand C. Contract D. Not respond |
B. Expand |
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Whenever you transport or store disconnected propane containers you should always A. Use a plug or cap in the service opening B. Remove propane from the container C. Lay the container down for increased stability D. Transport the container in groups of at least five |
A. Use a plug or cap in the service opening |
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List the typical safety equipment and clothing that a technician should use and wear while purging a propane container A. Protective eyewear B. Heavy gloves C. Protective footwear D. All of the above |
D. All of the above |
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The minimum clearance from any source of ignition when purging is ______ feet A. 10 B. 15 C. 20 D. 25 |
D. 25 |
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A DOT cylinder utilizes a single valve design for 3 functions --- filling, shut-off and A. Regulation B. Purging C relief D. By-pass |
C. Relief |
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A DOT cylinder vent stem (dip tube) A. Is usually the same length on different size cylinders B. Has its length stamped on the valve guard C. Is easily removed by unscrewing the liquid level outage valve D. Needs to be replaced before recertifying the cylinder |
B. Has its length stamped on the valve guard |
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In closing a propane container service valve you should use only A. Socket wrenches B. To open end wrenches C. Hands D. Two adjustable wrenches |
C. Hands |
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Which of the following is not a propane container appurtenance A. Fill valve B. High pressure pigtail C. Liquid level gauge D. Service valve |
B. High pressure pigtail |
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Which of the following valves is the primary valve on a DOT cylinder? A. Excessive flow valve B. Liquid level outage valve C. Service valve D. Fill valve |
C. Service valve |
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A device used to withdraw propane vapor from the tanks service valve is called a A. Suction hose B. Low-pressure hose C. Decompression tube D. Vapor withdrawl tube |
D. Vapor withdrawl tube |
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RVIA Sanctions what propane tests A. Combustibility B. Container pressure C. Regulator lockup D. Vaporization rate |
C. Regulator lockup |
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The POL valve has A. Right handed threads B. ACME threads C. No threads D. Left handed threads |
D. Left handed threads |
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Correct installation of a propane regulator requires A. Setting the diaphragm position B. Positioning bent down word within 45° of the vertical plane C. Using lubricant on the threads D. Testing the OPD for proper operation |
B. Positioning vent down word within 45° of the vertical plane |
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What percentage of propane flow is required when performing a propane regulator lockup test? A. 0% B. 25% C. 50% D. 75% |
A. 0% |
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Foreign material in a propane regulator may cause A. Increasing system pressure after lock up B. Liquid propane to be introduced into the piping system C. Oily residue at or near the vent D. Leaking pass the diaphragm |
A. Increasing system pressure after lock up |
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Which type of propane connection requires sealant A. Flared B. Pipe threaded C. ACME threaded D. POL fitting |
B. Pipe threaded |
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A propane timed pressure drop test may be invalid if A. Run for longer than three minutes B. Initial system pressure is reduced to 8" water column C. A U-Tube monometer is used D. Piping temperature increases during test |
D. Piping temperature increases during test |
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Corrosion may be created in the propane piping system by A. Leak detector solution containing ammonia B. The incorrect sealant C. Condensation forming on the regulator diaphragm D. . |
A. Leak detector solution containing ammonia |
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Three minutes is the A. Recommended amount of time to complete a hot skin test B. Minimum duration for a propane time pressure drop test C. Required rest. Between sequential CO alarm tests D. Time that a 5 pound class ABC fire extinguisher must operate continuously |
B. Minimum duration for a propane time pressure drop test |
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The main supply on/off valve for the propane system is the A. Service valve (shut off valve) assembly B. Fill valve C. Excess flow valve D. Auto stop valve |
A. Service valve (shut off valve) assembly |
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The internal float device that is connected to the fill valve is called the A. excess flow valve B. service valve C. overfilling prevention device D. pressure relief valve |
C. overfilling prevention device |
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The valve design to open at a specific pressure to prevent container rupture is called the A. pressure relief valve B. excess flow valve C. auto stop D. backflow valve |
A. pressure relief valve |
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______ is the minimum time, in minutes, for conducting a timed pressure drop test per NFPA A. 1 B. 3 C. 5 D. 10 |
B. 3 |
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What is the nominal inches of water column pressure that must be maintained during a timed pressure drop test A. 3 B. 7 C. 8 D. 10 |
C. 8 |
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A manometer is an instrument used to measure A. Gas density B. Electrolytes volume C. Gas volume D. Gas pressure |
D. Gas pressure |
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A lock up test is conducted to determine A. The upper operating range of the regulator B. The lower operating range of the regulator C. The upper pressure of the containers output D. The lower pressure of the containers output |
A. The upper operating range of the regulator |
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The maximum allowable lock up pressure of any water column propane system is A. 16 inches WC B. 14 inches WC C. 12 inches WC D. 11 inches WC |
B. 14 inches WC |
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Which one of the following conditions must exist during a lock up test A. all appliances operating B. only pilot light lit C. 50% BTU capacity D. no LP demand |
D. no LP demand |
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Upon completion of a regulator adjustment you should always follow up with a ______ A. Lock up test B. Time pressure drop tests C. Operating pressure test D. Atmospheric test |
A lock up test |
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The two ingredients that are prohibited in liquid leak detectors are A. ammonia and chlorine B. Chlorine and Hydrogen C. ammonia and hydrogen D. alcohol and nitrogen |
A. ammonia and chlorine |
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The process of displacing air and contaminants from a propane container using propane vapor or vacuum is A. Refrigeration B. Purging C. Priming D. Regeneration |
B. Purging |
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After purging a propane container at sea level there will still be _______ pressure inside the container because of atmospheric pressure A. 14.7 psi B. 12 psi C. 10 psi D. 8 psi |
A. 14.7 psi |
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Contaminants in propane containers can lead to A. rust B. false container pressure C. odor fade D. all of the above |
D. All of the above |
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It is required that you change the fill valve on a mounted ASME tank. To safely remove propane from the tank you will A. Open the outage valve and drain the liquid B. Remove the fill valve with the cap on C. Burn off the propane with a suitable torch D. Open the service valve until the vapor is gone |
C. Burn off the propane with a suitable torch |
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Pinhole leaks in used containers can usually be detected by the presence of A. A white mist B. an oily spot C. a rust spot D. an oxidized spot |
B. an oily spot |
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What is the propane gallon capacity of a properly filled ASME tank at 60°F with a water capacity of 28.6? A. 15 B. 20.5 C. 22.9 D. 24.8 |
C. 22.9 |
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What is the cylinder fill weight for a 30lb DOT cylinder with a tare weight of 15 pounds A. 15 B. 30 C. 40 D. 45 |
D. 45 |
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The correct level that a properly sized and installed dip tube will extend into a propane DOT cylinder is A. 20% B. 40% C. 60% D. 80% |
A. 20% |
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Newer overfilling prevention devices for tanks have a piston assembly and ______ that restricts the inlet fill capacity A. orifice B. O ring C. valve D. baffle |
C. Valve |
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An excess flow valve, when activated, ________ the flow of propane A. increases B. improves C. limits D. stops |
C. Limits |
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The _____ acts as protection because it will severely restrict the propane flow when a propane line ahead of a regulator is broken or opened A. service valve B. back flow valve C. excess flow valve D. fill valve |
C. Excess flow valve |
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The device that closes when the liquid or vapor passing through it exceeds the prescribed rate of flow is called the A. excess flow valve B. service valve C. pressure relief valve D. backflow check valve |
A. Excess flow valve |
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Flare fittings are designed to be used without A. pipe dope B. Teflon tape C. thread wrap D. all of the above |
D. All of the above |
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The maximum distance in feet required between copper tubing supports is ____ feet A. 2 B. 4 C. 6 D. 8 |
B. 4 |
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The two types of brass flare nuts approved for use in RVs are A. forged and molded B. molded and stress relieved C. welded and forged D. forged and stress relieved |
D. Forged and stress relieved |
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The number of threads on iron pipe should be ____ for use on propane manifold connector installed on recreational vehicles A. approximately 10 B. between 3 and 4 C. approximately 20 D. between 35 and 40 |
A. Approximately 10 |
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The first stage of a two stage regulator is designed to reduce pressure in the first stage to A. 6-8 ounces B. 10 to 12 pounds per square inch C. 14"-16" water column D. 20 to 22 pounds per square inch |
B. 10 to 12 pounds per square inch |
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An LP regulator must have rated capacity equal to or greater than A. a 2" diameter if round and 2"x4" if rectangular B. the BTU input of the largest appliance C. the wetted surface potential of the smallest tank D. the total BTU input of all appliances |
D. the total BTU input of all appliances |
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Water capacity of an ASME tank is in A. quarts B. gallons C. pounds D. ounces |
B. Gallons |
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Using the table above (hit bottom left hand corner of card for zoom button) what is the maximum allowable depth for a dent 2-7/8" in diameter on a DOT cylinder A. .29" B. .30" C. .31" D. .32" |
A. .29"
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On a new tank, a float type 80% overfilling prevention device does not appear to be excepting propane, the technician should first A. check the outage valve B. oil the valve plunger C. check the valve for correct position D. manually operate the plunger |
C. check the valve for correct position |
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A solenoid valve on the propane system is a normally closed valve what does this mean? A. The valve is closed manually to allow the gas to flow B. Power to the valve is needed to keep the valve open C. Power to the valve is needed to keep the valve closed D. The valve is closed manually to stop the flow of gas |
B. Power to the valve is needed to keep the valve open |
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In transferring propane from one container to another, the receiving container must be A. purged B. smaller C. different type D. a different color |
A. Purged |
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When transferring propane from one container to another it is recommended that a technician wear all of the following except A. Protective eye wear B. heavy gloves C. protective footwear D. respirator |
D. Respirator |
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Propane needs what percent of vapor in an air gas mixture to ignite A. 10.2 and 15.3 B. 76.1 and 78.3 C. 2.15 and 9.6 D. 0.025 and 0.096 |
C. 2.15 and 9.6 |
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A manometer is an instrument used to measure A. utility water pressure B. tire pressure C. low pressure systems D. distance |
C. low pressure systems |
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Any propane cylinder due for recertification A. can be recertified by a master technician B. cannot be filled or used C. can be used only on pre-1985 RV's D. must have the service valve replaced |
B. cannot be filled or used |
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When removing and replacing an ASME tank, mounting bolts should be replaced with _____ bolts A. larger size and stronger B. equal size and strength C. equal size and stronger D. equal size and longer |
B. equal size and strength |
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A technician can determine the grade of a bolt by A the shape of the bolt head B. the color of the bolt C. the type of nut used D. the markings on its head |
D. the markings on its head |
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A high-pressure flexible connector or pigtail is limited to a maximum length of ____ feet A. 3 B. 5 C. 10 D. 15 |
B. 5 |
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If a high or low pressure propane hose needs a new fitting you should A. replace the entire hose assembly B. use duct tape C. swag a new fitting on the hose D. replace with Barb fitting with a hose clamp |
A. Replace the entire hose assembly |
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Blowing unburned propane vapor into the atmosphere through an orifice larger than a _____ drill is against fire safety and/or environmental codes A. # 38 B. #42 C. #54 D. # 58 |
C. #54 |
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It is recommended that, when torching off a container, the torch can be located at least _____ feet from the unit for fire safety A. 5 B. 10 C. 15 D. 20 |
B. 10 |
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A torch up to ____ BTU is typically used to burn off the remaining LP gas vapor from a container A. 200,000 B. 300,000 C. 400,000 D. 500,000 |
D. 500,000 |
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1 gallon of propane contains approximately 91,690 BTUs at 60°F. An appliance rated at 30,000 BTU will have a continuous operation time of approximately A. 2 hours B. 3 hours C. 6 hours D. 12 hours |
B. 3 hours 91,690/30,000=3.056333333 |
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You have two 20 pound cylinders. A pound of propane contains approximately 21,600 BTU. Approximately how long will a 30,000 BTU appliance operate continuously at 60°F? A. 19 hrs B. 29 hrs C. 39 hrs D. 49 hours |
B. 29 hrs 2x20lb=40x21,600=864,000/30,000=28.8 |
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Exceeding the vaporization rate of the container is caused by A. cold ambient temperature B. high demand on system C. low liquid level D. all of the above |
D. All of the above |
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Purging an LP container ensures it does not contain A. air B. water C. contaminated LP D. all of the above |
D. All of the above |
