HVAC CONTRACTOR EXAM QUESTIONS
WITH CORRECT ANSWERS
An instrument that measures potential differences between 2 points in
| | | | | | | | | |
an electrical circuit is called?
| | | |
A. potentiometer
|
B. thermistor
|
C. ohmeter
|
D. voltmeter - CORRECT ANSWER✔✔-voltmeter
| | | |
This device uses a thermal sensing bulb at the outlet of the evaporator
| | | | | | | | | | | | |
to sense temperature and control superheat
| | | | |
A. automatic expansion valve
| | |
B. thermostatic expansion valve
| | |
C. low side float
| | |
D. schraeder valve - CORRECT ANSWER✔✔-thermostatic expansion
| | | | | | |
valve
,when installing a reversing valve on a heat pump, how many brazed
| | | | | | | | | | | |
joints should be made?
| | |
a. 3
|
b. 5
|
c. 4
|
d. 2 - CORRECT ANSWER✔✔-4
| | | |
what would not be considered a misuse of a contractors license?
| | | | | | | | | |
a. advertising under mulitple names
| | | |
b. employing service technicians to work under their license
| | | | | | | |
c. loaning license to more than one company
| | | | | | |
d. continue to work on an expired license - CORRECT ANSWER✔✔-
| | | | | | | | | |
employing service technicians to work under their license
| | | | | | |
what is used to prevent microbiological growth and help "dirty socky
| | | | | | | | | | |
syndrome?
a. radiation
|
b. ultraviolet light
| |
c. electrostatic filters
| |
,d. heat rated static filters - CORRECT ANSWER✔✔-ultraviolet light
| | | | | | | |
a precisely sized drilled hole through which gas flows from the manifold
| | | | | | | | | | | |
to the burner is known as what
| | | | | |
a. spud
|
b. drill size
| |
c. orifice
|
d. dimple - CORRECT ANSWER✔✔-orifice
| | | |
rooftop package hvac units utilize economizers for what primary
| | | | | | | | |
purpose?
a. to exhaust extra indoor air
| | | | |
b. to equalize indoor/outdoor pressures
| | | |
c. to allow outside air to be used for cooling in mild weather
| | | | | | | | | | | |
d. to raise indoor relative humidity - CORRECT ANSWER✔✔-to allow
| | | | | | | | | |
outside air to be used for cooling in mild weather
| | | | | | | | |
what is the minimum gauge required for a 12" galvanized steel
| | | | | | | | | | |
connector used to connect a lows heat appliance?
| | | | | | |
, a. .019
|
b. .029
|
c. .034
|
d. .2 - CORRECT ANSWER✔✔-.029
| | | |
after cutting pipes they must be reamed for what purpose?
| | | | | | | | |
a. to clean pipe threads
| | | |
b. to smooth the end of the pipe
| | | | | | |
c. to remove burrs and chips from the inside
| | | | | | | |
d. to help the threading process - CORRECT ANSWER✔✔-to remove
| | | | | | | | | |
burrs and chips from the inside
| | | | |
in manual d what is the suggested friction (IWC) loss for hand dampers?
| | | | | | | | | | | |
a. .01
|
b. .08
|
c. .1
|
d. .03 - CORRECT ANSWER✔✔-.03
| | | |
WITH CORRECT ANSWERS
An instrument that measures potential differences between 2 points in
| | | | | | | | | |
an electrical circuit is called?
| | | |
A. potentiometer
|
B. thermistor
|
C. ohmeter
|
D. voltmeter - CORRECT ANSWER✔✔-voltmeter
| | | |
This device uses a thermal sensing bulb at the outlet of the evaporator
| | | | | | | | | | | | |
to sense temperature and control superheat
| | | | |
A. automatic expansion valve
| | |
B. thermostatic expansion valve
| | |
C. low side float
| | |
D. schraeder valve - CORRECT ANSWER✔✔-thermostatic expansion
| | | | | | |
valve
,when installing a reversing valve on a heat pump, how many brazed
| | | | | | | | | | | |
joints should be made?
| | |
a. 3
|
b. 5
|
c. 4
|
d. 2 - CORRECT ANSWER✔✔-4
| | | |
what would not be considered a misuse of a contractors license?
| | | | | | | | | |
a. advertising under mulitple names
| | | |
b. employing service technicians to work under their license
| | | | | | | |
c. loaning license to more than one company
| | | | | | |
d. continue to work on an expired license - CORRECT ANSWER✔✔-
| | | | | | | | | |
employing service technicians to work under their license
| | | | | | |
what is used to prevent microbiological growth and help "dirty socky
| | | | | | | | | | |
syndrome?
a. radiation
|
b. ultraviolet light
| |
c. electrostatic filters
| |
,d. heat rated static filters - CORRECT ANSWER✔✔-ultraviolet light
| | | | | | | |
a precisely sized drilled hole through which gas flows from the manifold
| | | | | | | | | | | |
to the burner is known as what
| | | | | |
a. spud
|
b. drill size
| |
c. orifice
|
d. dimple - CORRECT ANSWER✔✔-orifice
| | | |
rooftop package hvac units utilize economizers for what primary
| | | | | | | | |
purpose?
a. to exhaust extra indoor air
| | | | |
b. to equalize indoor/outdoor pressures
| | | |
c. to allow outside air to be used for cooling in mild weather
| | | | | | | | | | | |
d. to raise indoor relative humidity - CORRECT ANSWER✔✔-to allow
| | | | | | | | | |
outside air to be used for cooling in mild weather
| | | | | | | | |
what is the minimum gauge required for a 12" galvanized steel
| | | | | | | | | | |
connector used to connect a lows heat appliance?
| | | | | | |
, a. .019
|
b. .029
|
c. .034
|
d. .2 - CORRECT ANSWER✔✔-.029
| | | |
after cutting pipes they must be reamed for what purpose?
| | | | | | | | |
a. to clean pipe threads
| | | |
b. to smooth the end of the pipe
| | | | | | |
c. to remove burrs and chips from the inside
| | | | | | | |
d. to help the threading process - CORRECT ANSWER✔✔-to remove
| | | | | | | | | |
burrs and chips from the inside
| | | | |
in manual d what is the suggested friction (IWC) loss for hand dampers?
| | | | | | | | | | | |
a. .01
|
b. .08
|
c. .1
|
d. .03 - CORRECT ANSWER✔✔-.03
| | | |
