HVAC CONTRACTOR EXAM UPDATED ACTUAL Questions and CORRECT
Answers
"dirty socky syndrome?
An instrument that measures potential differences be-
tween 2 points in an electrical circuit is called?
A. potentiometer
B. thermistor
C. ohmeter
D. 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
when installing a reversing valve on a heat pump, how
many brazed joints should be made?
a. 3
b. 5
c. 4
d. 2
what would not be considered a misuse of a contractors
license?
a. advertising under mulitple names
b. employing service technicians to work under their li-
cense
c. loaning license to more than one company
d. continue to work on an expired license
what is used to prevent microbiological growth and help
, voltmeter
thermostatic expansion valve
4
employing service technicians to work under their
license
, a. radiation
b. ultraviolet light ultraviolet light
c. electrostatic filters
d. heat rated static filters
a precisely sized drilled hole through which gas flows from
the manifold to the burner is known as what
a. spud orifice
b. drill size
c. orifice
d. dimple
rooftop package hvac units utilize economizers for what
primary purpose?
a. to exhaust extra indoor air
to allow outside air to be used for cooling in mild weather
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
what is the minimum gauge required for a 12" galvanized
steel connector used to connect a lows heat appliance?
a. .019 .029
b. .029
c. .034
d. .2
after cutting pipes they must be reamed for what pur-
pose?
to remove burrs and chips from the inside
a. to clean pipe threads
Answers
"dirty socky syndrome?
An instrument that measures potential differences be-
tween 2 points in an electrical circuit is called?
A. potentiometer
B. thermistor
C. ohmeter
D. 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
when installing a reversing valve on a heat pump, how
many brazed joints should be made?
a. 3
b. 5
c. 4
d. 2
what would not be considered a misuse of a contractors
license?
a. advertising under mulitple names
b. employing service technicians to work under their li-
cense
c. loaning license to more than one company
d. continue to work on an expired license
what is used to prevent microbiological growth and help
, voltmeter
thermostatic expansion valve
4
employing service technicians to work under their
license
, a. radiation
b. ultraviolet light ultraviolet light
c. electrostatic filters
d. heat rated static filters
a precisely sized drilled hole through which gas flows from
the manifold to the burner is known as what
a. spud orifice
b. drill size
c. orifice
d. dimple
rooftop package hvac units utilize economizers for what
primary purpose?
a. to exhaust extra indoor air
to allow outside air to be used for cooling in mild weather
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
what is the minimum gauge required for a 12" galvanized
steel connector used to connect a lows heat appliance?
a. .019 .029
b. .029
c. .034
d. .2
after cutting pipes they must be reamed for what pur-
pose?
to remove burrs and chips from the inside
a. to clean pipe threads
