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                 HVAC LICENSING PRACTICE TEST

Practice hvac licensing test. This quiz is based on the International Mechanical and Fuel Gas Codes, ACCA’s Manual j and D and NASCLA’s Contractor Business book.

  1. 1/2″ copper tubing must be supported a minimum of _______ feet when installed horizontally

a) 4

b) 10

c) 8

d) 6

2. THE AMERICANS WITH DISABILITIES ACT APPLIES TO ALL EMPLOYERS WHO HAVE _______ OR MORE EMPLOYEES

a) 25

b) 15

c) 50

d) 10

3. When using a test pressure of 10 psig, the test guage shall not be capable of reading pressures greater than_____PSIG

a) 100

b) 80

c) 50

d) 75

4. The maximum cfm of duct leakage allowed with a air handler in place for a 1500 square foot home with .1 inch w.g. is____.

a) 75

b) 150

c) 60

d) 80

5. Vented wall furnaces shall be located so that a door cannot swing within _____ inches of the air inlets or outlets of such furnace measures at right angles to the openings

a) 12

b) 18

c) 36

d) 24

6. Unless welded or placed in a ventilated shaft, the maximnm operating pressure of gas piping in a residence shall not exceed _______ psig

a) .5

b) 10

c) 2

d) 5

7. Grease ducts in shaft enclosures shall have a clearance of ________ inches to construction of non combustible gypsum attached to non combustible structures

a) 18

b) 12

c) 6

d) 3

8. If an 6″ X 10″ duct is terminated with a metal louver (75% free area), the louver must be a minimum _____ square inches

a) 90

b) 60

c) 120

d) 80

9. THE MAXIMUM HORIZONTAL LENGTH OF A SINGLE WALL CONNECTOR IS ______% OF THE HIEGHT OF THE CHIMNEY OR VENT.

a) 50

b) 100

c) 75

d) 150

10.  Plastic pipe shall not be operated at pressures greater than ______ psig for LP gas

a) 100

b) 15

c) 30

d) 10

11. Screens used to protect intake openings for ventilation may not have a mesh less than____ inch.

a) 1/16

b) 1/2

c) 1/8

d) 1/4

12. Exhaust outlets that terminate above a roof shall have a discharge outlet not less than ___ inches above the roof surface

a) 36

b) 30

c) 48

d) 40

13. 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?

a) 3,535 BTUH

b) 15,360 BTUH

c) 1,512 BTUH

d) 2,609 BTUH

14. THE LARGEST A BORED HOLE MAY BE IN A 2′ x 9.5″ joist

.33 x 9.5 =3.13

a) 2″

b) 3.13″

c) 3″

d) 2.85″

15. When mechanically ventilating a 1500 square foot conference room in an office building, how many CFM of outdoor air are required?

a) 375

b) 1000

c) 50

d) 3000

16. IF A CONTRACTOR WORKS ON 15% PROFIT, WHAT WOULD HIS SALES HAVE TO BE TO MAKE $75,000?

a) $600,000

b) $112,000

c) $500,000

d) $862,500

17. A commercial stainless steel duct must be constructed of ______ gage thickness

a) 20

b) 14

c) 18

d) 16

18. A gas line serving a grill may be installed a minimum ______ inches beow grade as long as it is approved and not susceptible to physical damage

a) 8

b) 12

c) 6

d) 16

19. Passageways in attics shall not be less than _____ inches wide

a) 24

b) 20

c) 30

d) 22

20. A GAS FIRED APPLIANCE RATED AT 75,000 BTUH INPUT MUST BE PLACED IN A ROOM CONTAINING A MINIMUM ______ CUBIC FEET IF OUTDOOR COMBUSTION AIR IS NOT INTRODUCED.

a) 3750,

b) 7500

c) 1500

d) 75000

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