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100 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Where should a condensate drain never be put? |
Street |
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How many BTU's of heat is produced by a 600 watt incandescent light bulb? |
2,050 btuh |
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That which enables a device, appliance or equipment to be directly reached, without requiring the removal or movement of ay panel, door or similar obstruction? |
Ready Access |
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What happens to fiberglass insulation when it gets wet? |
It loses part of it’s R value |
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What is it called when a zeotropic refrigerant blend phase changes, the different components in the blend all have different vapor pressures? |
Fractionation |
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What is the "Winter Outdoor Design Temperature" for Alexander City, AL? |
22°F |
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What is the safety classification of refrigerant R-22? |
A1 |
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A 10" duct's Total Effective Length is 200 feet. If this duct has a total static pressure drop of.2", what is the velocity in the duct? |
780 |
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The definition of a damper is? a. A manually controlled device to regulate draft. b. An automatically controlled device to control rate of flow of air. c. A manually controlled device to regulate flow of combustion gases. d.all of the above |
All of the above |
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The factory nameplate label on all regulated appliances does not have to list the following? |
Date of Manufacture |
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What is the minimum width of the passageway to an appliance in the attic? |
22” |
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Which of the following is not a listed reason to provide access to an appliance? |
Energy Utilization |
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What is the friction rate of a 12" X 26" galvanized metal duct with 1" liner moving 1500 CFM? |
13" per 100' of duct |
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The definition/expression of U-value is ______? a. The coefficient of heat transfer through a building component, equal to the time rate of heat flow per unit area and unit temperature difference. b. Expressed as BTU per hour, per degree Fahrenheit, per square foot. c. The reciprocal of the total R value. d. All of the above |
All of the above |
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What is the minimum "R" value of refrigerant vapor line insulation? |
R-4 |
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If the exact free area is not known, the assumption is that there will be ___% free area for metal louvers & grilles used for combustion, ventilation, and dilution air. |
75% |
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Effective length of duct fitting groups is based on what friction rate pressure loss? |
0.08” |
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Supply and return ducts installed in attics shall be insulated to a minimum of? |
R-8 |
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Condensate piping from cooling coils shall have a minimum slope of ______%? |
1% |
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Ducts shall not be installed in or within how many inches of the earth? |
4” |
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What is the heat loss for a 6' x 7', double pane, clear glass, sliding glass door with a metal frame, no-thermal break, no internal shading, 1 foot overhang and 34 degrees latitude and an HTD of 48 degrees? |
1,754 Btuh |
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What size Type "B" double wall vent is needed to vent a 150,000 BTU input furnace that has a vent height of 6' and zero lateral feet? |
4” |
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Bored holes not greater than____%, of the depth of the stud are permitted innonbearing partitions or in any wall where each bored stud is doubled, provided not more than two such successive doubled studs are so bored? |
60% |
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Equipment supported from the ground shall be supported on a concrete slab and extend not less than _______inches above the adjoining ground? |
3” |
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Refrigerant blends that have a temperature glide when they boil and condense are called _______. |
Zeotropic |
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How much total Btuh heat gain would be contributed by one occupant for a residential dwelling application? |
430 |
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What is the sensible Btuh heat gain per occupant according to Manual J? |
230 |
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What is the latent heat gain per occupant according to Manual J? |
200 |
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What is the summer design temperature difference for a residence in Talladega, AL? |
19 °F |
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What is the saturation temperature at atmospheric conditions for R-410A? |
-60°F |
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Calculate the total "R-Value" for the following wall: Existing wall has a thermal resistance value of R-13, then a 1" Extruded (closed cell) Polystyrene is added with a thermal resistance value of R-5? |
R-18 |
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The HTM for an operable metal frame with no break, double pane clear glass window with a winter design temperature difference of 50°F would be _____? |
43.5 |
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The saturation temperature for R-22 at atmospheric pressure is_____? |
-41 °F |
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What is the rectangular duct equivalent size for a 12" round duct? |
10'x 12" |
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With a friction rate of .1"w.c. and 1,600 FPM; what is the equivalent round duct diameter? |
30” |
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Enthalpy is defined as: a.Osmosis of refrigerant through the system b. Boiling temperature of refrigerant at saturation c. Heat content of air in Btu per lb. d. Winter design temperature |
c. Heat content of air in Btu per lb. |
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The difference between ventilation and infiltration is: |
Infiltration is accidental and ventilation is designed |
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Equivalent length is defined as: |
The effect of duct fittings on the pressure loss of a duct system |
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The moisture content in air is measured by weight and expressed as how many grains per pound? |
7000 |
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The formula for sensible BTU's cooling is: |
1.1 x CFM x Temp. diff. |
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What type of electrical device protects individuals against shock as well as provide current overload protection? |
Ground Fault Circuit Interrupter (GFCI) |
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All applicants for Certified Contractor status and all annual renewals shall provide a performance bond in the amount of $_____ to the board. |
$15,000.00 |
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What is the line number on Worksheet "B" you would use to enter the net area of identical assemblies of windows and glass doors? |
Line 11 |
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Given a Wet bulb temperature of 58° and a Dry bulb temperature of 65°, what is the dew point? |
53 degrees |
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With a measured Dry bulb temperature of 87° and a Relative humidity of 30%, what is wet bulb? |
65 |
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Given a Dew point of 52°, a Relative Humidity of 50%, what is the Dry bulb? |
72 |
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Effective length of duct fitting groups is based on what reference air velocity? |
900 Fpm |
900 Fpm |
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Which of the following illustrates the principle of convection? |
Movement of heat by fluid or air |
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Never fill a refrigerant cylinder over ______ % of its capacity? |
80 |
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On a TXV metering device, what purpose does the external equalizer line serve? |
It can compensate for the pressure drop through the evaporator. |
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Which of the following is a refrigerant blend?
a. Chlorofluorocarbon (CFC) b. Hydrofluorocarbon (HFC) c. Hydrochlorofluorocarbon (HCFC) d. All of the above are blended refrigerants. |
b. Hydrofluorocarbon (HFC) |
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What is meant by the term "recovery"? a. To clean refrigerant for reuse. b. To remove refrigerant and store it without testing or processing c. to reprocess refrigerant d.none of the above |
b. To remove refrigerant and store it without testing or processing |
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What is the specific heat of standard dry air? a. 11.68 Btu/Lb. F b. 0.08645 Btu/Lb F c. 14.10 Btu/Lb F d. None of the above |
d. None of the above |
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What organization governs the Clean Air Act of 1993? |
EPA |
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Refrigerant piping shall be tested for leaks with an inert dried gas including: CO2 and which of the following? a. Oxygen b. Compressed air c. Nitrogen d. All of the above |
C. Nitrogen |
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Which of the following is the most accurate type of metering device? |
Electronic Expansion Valve |
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What is the default pressure drop for a typical hand balancing damper? |
.03" W.C. |
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What is the objective of the Manual D process? a. To size the blower in the air handler to match the equipment load calculation. b. To size the ductwork via the proper square footage of the home. c. To size a ducted airway passage that will work with the blower equipment. d. All of the above are correct |
c. To size a ducted airway passage that will work with the blower equipment. |
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When cutting tubing, a technician should apply moderate pressure with the cutter and rotate the cutter and tighten the "T-Handle" how much per revolution? |
¼ turn |
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Calculate superheat for the following R-22 system conditions: • Suction Pressure 70 PSIG • Liquid Pressure 278 PSIG • Liquid Line Temperature 110°F • Sustion Line Temperature 51°F • O.D.T. 95°F a. 12°F b. 14°F c. 16°F d. None of the previous |
d. None of the previous |
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How much air is required to burn one cubic foot of gas? |
10 cu. Ft. |
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Which of the following best describes the location for a low-side float? |
Low side |
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Which of the following would be the most common inlet and outlet water temperatures for a two-pass chiller? |
55 °F & 45 °F |
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Which of the following best describes the use of a reamer? a. is used to join two pieces of copper tubing of the same diameter. b. is used to remove burrs from the inside of the tubing after it has been cut. c. is used to secure the proper angle on the tubing for a flare nut connection. d. None of the above |
b. is used to remove burrs from the inside of the tubing after it has been cut. |
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What must be checked before re-using recycled refrigerant in a piece of equipment? |
moisture & acid |
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Which of the following best describes the method that restores refrigerant back to the ARI Standard? |
Reclaim |
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Soldering practices allow a filler metal of what % Tin & what % Antimony? |
95% & 5% |
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If a person in responsible charge of a business entity desires to qualify an additional business in order to have two companies; then what must the individual be required to do? a. The person is required to appear at a Board meeting. b. The person must prove that they are financially responsible. c. Simply must pay an additional licensing fee to the Board. d. All of the above |
d. All of the above |
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Every certified contractor shall identify themselves on their service vehicles by performing which of the following requirements? a. Display the phrase "AL Number" or "AL No" or "AL #" before the number b. Decal must be displayed on at least two sides of the vehicle c. Must be at least two inches in height d. All of the above are required. |
d. All of the above are required. |
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Certified "Alabama Board of Heating, Air Conditioning and Refrigeration Contractors" who do not hold the appropriate gas fitter license when working on HVAC equipment which involve gas connections; shall |
shall work only gas piping after the shutoff valve to the unit located ahead of all controls. |
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Calculate superheat for the following R-410A system conditions: • Suction Pressure 118 PSIG Liquid Pressure 390 PSIG • Liquid Line Temperature 110°F Suction Line Temperature 52°F O.D.T. 95°F a.12°F b. 14°F c. 16°F d. None of the previous |
a.12°F |
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Calculate subcooling for the following R-410A system conditions: Suction Line Pressure 70 PSIG Liquid Line Pressure 390 PSIG Liquid Line Temperature 110°F Suction Line Temperature 52°F O.D.T. 95°F a. 5°F b. 10°F c. 15°F d. None of the previous |
a. 5°F |
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Determine the round duct diameter for a galvanized metal duct with 1,400 FPM & .1”w.c |
24” |
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Which of the following methods is best utilized to cut a capillary tube? |
Correctly score with a file and break |
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When a technician approaches a unit in the field; what should be the first action taken? |
Turn the system fan to the on position |
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Which of the following refrigerants would be most likely used in an ice skating rink? |
R-717 Ammonia |
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Given a 54°F temperature difference, calculate the heat loss for a "Glass Block Window" that has a U-value of. 6 that measures 4' x 7'. |
907 |
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If a Certified Contractor in responsible charge of a company leaves the company for any reason, the Certified Contractor shall notify the HACR Board within_________. |
10 days |
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Calculate the gross wall area for the following: 8'11" height and 36' length |
321'2 |
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Calculate the area for the following window: 3'4" × 5'8" |
18.88’2 |
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Any person performing the functions of a certified contractor in violation of the laws, rules & regulations of the HACR Board of Alabama shall be guilty of what? |
Class A Misdemeanor |
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The Board may levy and collect administrative fines for serious violations of the Violations and Penalties chapter or the rules and regulations of the board of not more than ______ for each violation. |
$2000.00 |
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Determine the rectangular equivalent for the following round duct, 30" round. |
18" x 44" |
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Determine the rectangular equivalent for the following round duct, 14" round. |
11" x 15" |
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Determine the round duct diameter for a galvanized metal duct with 750 FPM & .14 w.c. |
7” |
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Determine the CFM of airflow for a galvanized metal duct with 750 FPM & .14°w.c. |
200 |
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Determine the net wall area for the following application: 8' x 32' wall with four windows measuring 3’ x5’. |
196’ 2 |
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A reversing valve should have how many refrigerant piping connections? |
4 |
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Which of the following tools would a technician use to check gas pressure on a Dual-Fuel heat pump? |
manometer |
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Economizers most often use which of the following methods to determine the outside-air conditions? a. dry bulb temperature b. enthalpy method c. heat content method d. all of the previous |
d. all of the previous |
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While performing the mandatory duct leakage test for new construction, what shall the required pressure differential across the system be held at for the test? |
0.1” or25 Pa |
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What is the maximum leakage allowed for the mandatory post-construction duct leakage pressure test? |
4 cfm per 100 square feet of conditioned area |
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The power rating of a transformer is listed as. |
VA |
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What is the correct arrangement of the ohm's law formula? |
E- IxR |
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To protect gas piping installed in notched framing, metal shield plates covering the piping shall extend no less than______inches above the bottom framing member. |
4” |
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Support of ¾" tubing used for the purpose of gas delivery should be spaced no greater than every _____ feet. |
6’ |
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The sizing of gas vents shall be in accordance with the appliance manufacturers instructions except for category ________appliance. |
I |
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What is the minimum thickness for galvanized steel vent connectors for low heat appliances with a diameter of 6 inches? |
0.023” |
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What size round duct moving 800 CFM will have a velocity of 580 FPM? |
16” |
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While pressure testing gas piping for leaks, the test duration shall be not less than _______. |
10 minutes |
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