ARIZONA HVAC EXAM REVIEW
1. The position of the potential relay while the compressor is running is....
Answer Open
2. Appliances located in a parking garage (commercial) shall be located a mini- mum
of above the floor
Answer 8 ft.
3. Ducts connecting to a furnace shall have a minimum clearance to com-
bustibles....
Answer Or per manufacturer's installation instructions
4. A 12in x 12in. Square duct is being replaced with a round duct. What size
round duct will be needed to maintain the same volume?
Round equivalent of an oval airway
Answer
D = 1.3 x (144) 0.625/ 24^0.250
,1.3 x 10.09 =
13.11 in
5. What controls the oil pump on an oil fired hydronic boiler?
Answer Thermostat
6. A secondary drain system shall do all of the following except
Answer Not go over the main structure entrance
7. An air handler located inside controls a condenser located outside, what is not
permitted?
Answer Overhang roof under 8ft.
8. What is a result of a steambound boiler?
Answer Underfilled Boiler
9. What is the purpose of a bleed-off device in a cooling tower?
Answer To keep the evaportating water system clean
10. What is the maximum bend arc for steel gas piping
, Answer 90 degrees
11. What is the purpose of an evaporator pressure regulator?
Answer Maintains a set minimum Pressure
12. What type of instrument is used to measure humidity
Answer Hygrometer
13. If an existing wall is rated at R-8 and new insulation is added of R-15, what is the
new U-Valve?
U-Value = 1/(sum of all R-Value)
Answer 0.4
14. What is the principle difference between a heat pump and a unit used for cooling
only?
Answer Reversing Valve
15. Which device prevents oil slugging?
Answer Crankcase Heater
, 16. What device is used to prevent slugging in a heat pump?
Answer Accumulators
17. When can a duct penetrate a fire wall?
Answer When protected with a listed fire damper
18. How often should the low water fuel shutoff shutoff should be tested using the
blowdown method
Answer Daily
19. What maximum temperature may a refrigerant cylinder be safely heated to in
order to speed up the charging process?
Answer 120 *F
20. What limits the temperature of a burner?
Answer High Limit Control
21. The highest temperature at which a substance may be liquefied
Answer Critical Temper- ature
22. What setting should the fuel gas valve be set for the boiler?
1. The position of the potential relay while the compressor is running is....
Answer Open
2. Appliances located in a parking garage (commercial) shall be located a mini- mum
of above the floor
Answer 8 ft.
3. Ducts connecting to a furnace shall have a minimum clearance to com-
bustibles....
Answer Or per manufacturer's installation instructions
4. A 12in x 12in. Square duct is being replaced with a round duct. What size
round duct will be needed to maintain the same volume?
Round equivalent of an oval airway
Answer
D = 1.3 x (144) 0.625/ 24^0.250
,1.3 x 10.09 =
13.11 in
5. What controls the oil pump on an oil fired hydronic boiler?
Answer Thermostat
6. A secondary drain system shall do all of the following except
Answer Not go over the main structure entrance
7. An air handler located inside controls a condenser located outside, what is not
permitted?
Answer Overhang roof under 8ft.
8. What is a result of a steambound boiler?
Answer Underfilled Boiler
9. What is the purpose of a bleed-off device in a cooling tower?
Answer To keep the evaportating water system clean
10. What is the maximum bend arc for steel gas piping
, Answer 90 degrees
11. What is the purpose of an evaporator pressure regulator?
Answer Maintains a set minimum Pressure
12. What type of instrument is used to measure humidity
Answer Hygrometer
13. If an existing wall is rated at R-8 and new insulation is added of R-15, what is the
new U-Valve?
U-Value = 1/(sum of all R-Value)
Answer 0.4
14. What is the principle difference between a heat pump and a unit used for cooling
only?
Answer Reversing Valve
15. Which device prevents oil slugging?
Answer Crankcase Heater
, 16. What device is used to prevent slugging in a heat pump?
Answer Accumulators
17. When can a duct penetrate a fire wall?
Answer When protected with a listed fire damper
18. How often should the low water fuel shutoff shutoff should be tested using the
blowdown method
Answer Daily
19. What maximum temperature may a refrigerant cylinder be safely heated to in
order to speed up the charging process?
Answer 120 *F
20. What limits the temperature of a burner?
Answer High Limit Control
21. The highest temperature at which a substance may be liquefied
Answer Critical Temper- ature
22. What setting should the fuel gas valve be set for the boiler?
