The following HVAC practice test has been prepared by ENERGY MARKETING SERVICE to help you prepare for the state licensing exam... The questions are representative of those you will face on the actual exam.  You will need the International Mechanical Code, International Fuel Gas Code and ACCA Manuals J and D to take this exam.  The test should be timed for 2 hours.  If you feel you need help obtaining your license please see our "GUIDE TO PASSING THE HVAC EXAM". It is only $97 and considered by most examinees to be more valuable than a $400 cram course. 


Practice HVAC exam


1. A LICENSEE MAY HAVE HIS LICENSE REVOKED FOR WHICH OF THE FOLLOWING:

MISCONDUCT
GROSS NEGLIGENCE
INCOMPETENCY
ALL THE ABOVE
2. WHICH OF THE FOLLOWING DOES NOT REQUIRE DISPLAY OF A LICENSE NUMBER?

CONTRACTS
YELLOW PAGE ADS
VEHICLE SIGNS
PROPOSALS
3. IF A CONTRACTOR WORKS ON 15% PROFIT, WHAT WOULD HIS SALES HAVE TO BE TO MAKE $75,000?

$500,000
$112,000
$862,500
$600,000
4. A CONTRACTOR PAYS $750 FOR A FURNACE PLUS 7% TAX. WHAT WOULD HIS SALES PRICE BE IF HE WISHED TO MAKE 30% GROSS PROFIT?

$1028
$1043
$975
$1146
5. THE MINIMUM INSULATION THICKNESS FOR REFRIGERANT LINES FOR A RESIDENCE IS ____.

1/4"
3/8"
1/2"
5/8"
6. THE DISTANCE FROM A METER TO A NATRUAL GAS WATER HEATER (40,000 BTUH) IS 30 FEET. 20 FEET FURTHER DOWN THE LINE IS A FURNACE (120,000 BTUH). WHAT IS THE MINIMUM PI[E SIZE THAT MUST BE USED BETWEEN THE WATER HEATER AND FURNACE? (PRESSURE DROP = .05)?

3/8"
1/2"
3/4"
1"
7. A HOUSE HAS A HEAT LOSSS OF 48,000 BTUH AT 20-DEGREE OUTDOOR TEMPERATURE. WHAT IS THE HEAT LOSS AT 40-DEGREE OUTDOOR TEMPERATURE?

124,000 BTUH
28,800 BTUH
19,200 BTUH
18,000 BTUH
8. A CEILING HAS A TOTAL U-VALUE OF .07. WHAT IS THE NEW R-VALUE IF R-19 IS ADDED?

30.28
31.28
32.28
33.28
9. A 30' X 8' PARTITION (2 X 4 STUDS, GYPSUM ON BOTH SIDES, NO INSULATION) SEPARATES TWO ROOMS HAVING A TEMPERATURE DIFERENCE OF 20 DEGREES. WHAT IS THE WINTER HEAT LOSS THROUGH THE PARTITION?

15,360 BTUH
3,535 BTUH
1,500 BTUH
2,609 BTUH
10. A 75,000 BTUH (INPUT RATING) 80% AFUE FURNACE HAS A TEMPERATURE RISE OF 45-DEGREES. WHAT IS THE CFM?

1212
1667
1515
1175
11. A CUSTOMER MOVES UP FROM AN 8 SEER TO A 13 SEER AIR CONDITIONER. WHAT WOULD HIS YEARLY SAVING BE IF HE WAS PAYING $650 PER YEAR FOR AIR CONDITIONING

$325
$260
$197
$250
12. A HEATPUMP IN A RESIDENCE MUST BE CONTROLLED BY WHICH OF THE FOLLOWING?

A PROGRAMABLE THERMOSTAT
A DEVICE TO PREVENT SUPPLEMENTARY HEAT FROM COMING ON IF HEAT PUMP CAN HANDLE THE LOAD ALONE
A DEVICE THAT ALLOWS SUPPLEMENTARY HEAT OPERATION DURING DEFROST CYCLES EXCEEDING 15 MINUTES
A FOSSIL FUEL KIT
13. IN A ROOM THAT IS LARGE IN COMPARISON WITH THE SIZE OF THE EQUIPMENT, AN APPLIANCE THAT REQUIRES 18" CLEARANCE ON ITS SIDES, MAY HAVE ITS CLEARANCE REDUCED TO ______ IF .024" SHEETMETAL WITH A VENTILATED AIR SPACE IS USED TO PROTECT THE COMBUSTIBLE SURFACE.

9
6
12
MAY NOT HAVE CLEARANCE REDUCED
14. WHAT IS THE VELOCITY OF 1400 CFM OF AIR IN A DUCT MEASURING 12" X 30"?

360 FPM
467 FPM
3.8 FPM
560 FPM
15. CATEGORY I GAS EQUIPMENT MAY BE VENTED WITH WHICH OF THE FOLLOWING TYPES OF VENTS?

SINGLE WALL METAL
TYPE B
CHIMNEY WITH CLAY LINER
ALL THE ABOVE
16. TWO NATURALLY VENTILATED APPLIANCES WITH A COMBINED CAPACITY OF 128,000 BTUH ARE CONNECTED TO A COMMON B-VENT, 18' HIGH WITH TWO 90-DEGREE ELBOWS. WHAT SIZE COMMON VENT SHOULD BE USED?

4"
5"
6"
7"
17. THE MAXIMUM ALLOWABLE HORIZONTAL LENGTH OF A CATEGORY I APPLIANCE VENT CONNECTOR IS _______ FEET FOR EACH INCH OF ITS DIAMETER.

1/2
1
1-1/2
2
18. THE MAXIMUM HORIZONTAL LENGTH OF A SINGLE WALL CONNECTOR IS ______% OF THE HIEGHT OF THE CHIMNEY OR VENT.

50
75
100
150
19. IN ORDER TO SUPPLY OUTDOOR COMBUSTION AIR USING THE TWO OPENING METHOD WITH HORIZONTAL DUCTS, WHAT SIZE WOULD EACH DUCT HAVE TO BE TO HANDLE A 140,000 BTUH FURNACE

7" X 10"
3.5" X 10"
14' X 10"
8.5" X 10"
20. IF A GALLON OF OIL CONTAINING 140,000 BTU'S SELLS FOR $1.25, HOW MUCH WILL 1,000,000 BTU'S COST WHEN USED IN AN 80% AFUE OIL FURNACE

$8.93
$14.00
$12.78
$11.16
21. IN WHICH OF THE FOLLOWING AREAS MAY A SINGLE WALL MOUNTED, 4000 BTUH UNVENTED GAS HEATER EQUIPED WITH AN OXYGEN DEPETION SENSOR BE ALLOWED?

SLEEPING ROOM
BATHROOM
STORAGE CLOSET
SURGICAL ROOM
22. GAS APPLIANCE CONNECTORS SHALL NOT PASS THROUGH ANY OF THE FOLLOWING EXCEPT

WALLS
APPLIANCE HOUSINGS
FACTORY BUILT FIREPLACES
FLOORS
23. RECLAIMED REFRIGERANTS SHALL NOT BE REUSED IN A DIFFERENT OWNERS EQUIPMENT UNLESS TESTED AND FOUND TO MEET THE PURITY REQUIREMENTS OF

ASHRAE 34
NFPA 54
ASTM A53
ARI 700
24. AN AIR CONDITIONER HAS HIGH SUCTION AND A LOW HEAD PRESSURES. WHAT WOULD BE A LIKELY CAUSE?

DIRTY FILTERS
BAD OR WEAK COMPRESSOR VALVES
CLOGGED METERING DEVICE
DIRTY CONDENSER COIL
25. A HOUSE HAS A HEATING LOAD OF 48,000 BTUH. HOW MANY CFM ARE REQUIRED FOR A ROOM WITH A HEAT LOAD OF 5200 BTUH, USING A FURNACE WITH A 1200 CFM BLOWER?

1112
112
133
468
26. WHAT IS THE DESIGN FRICTION RATE WHEN THE AVAILABLE STATIC PRESSURE FOR THE DUCT SYSTEMIS .36" WC AND THE RUN WITH THE LONGEST EFFECTIVE LENGTH IS 375 FEET?

.10" WC
.08" WC
.05" WC
.15" WC
27. A BLOWER WITH AN EXTERNAL STATIC PRESSURE OF .55" WC IS CONNECTED TO A 70 FT. LONG DUCT. THE SYSTEM INCLUDES REGISTERS AND GRILLS (.03" WC EACH), A COOLING COIL (.15" WC) AND FILTER (.10" WC). WHAT IS THE TOTAL AVAILABLE STATIC PRESSURE REMAINING FOR SIZING THE DUCT?

.24" WC
.17" WC
.30" WC
.15" WC
28. A 12" ROUND DUCT HAS A RECTANGULAR EQUIVALENT OF

14 X 8
15 X 8
16 X 8
17 X 8
29. THE VELOCITY OF 250 CFM OF AIR IN A FLEXIBLE, SPIRAL WIRE HELIX CORE DUCT SIZED AT .08" WC STATIC PRESSURE IS

400 FPM
500 FPM
750 FPM
900 FPM
30. FOR A BUILDING TO BE MAINTAINED AT 70 F, HOW MANY BTUH ARE REQUIRED TO OFFSET 300 CFM OF 20 F OUTDOOR VENTILATION?

6,000
1.400
6,600
16,500
31. THE AMERICANS WITH DISABILITIES ACT APPLIES TO ALL EMPLOYERS WHO HAVE _______ OR MORE EMPLOYEES

10
15
25
50
32. A 500 SQUARE FOOT CONFERENCE ROOM REQUIRES _______CFM OF OUTDOOR VENTILATION

150
250
500
750
33. WHEN THE COOLING COIL IS LOCATED IN THE SUPPLY PLENUM OF A WARM AIR FURNACE, THE FURNACE BLOWER SHALL BE RATED AT NOT LESS THAN _____ " WC UNLESS THE FURNACE IS LISTED AND LABLELED FOR USE WITH A COOLING COIL.

.3
.4
.5
.6
34. HOW MANY 2" X 8" FLOOR JOISTS SPACED 16" O.C. MUST BE PANNED TO HANDLE 1400 CFM?

1
2
3
4
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