1
A/C
A/C and Heating Certification Test
Exam Questions with Correct Verified
Solutions 100% Guaranteed Pass
If little or no resistance is felt while operating the temperature
control lever, the problem is most likely _____________________. - ANS
✔The control cables have slipped loose from the dash control or door arm.
The boiling point of a liquid increases as_______________. - ANS ✔The
pressure applied to it increases
True or False? Water vaporizes into steam at 212 degrees Fahrenheit.
- ANS ✔True
Before 1994, most manufacturers used __________ as a refrigerant. - ANS
✔R-12
Tech A says European and Japanese manufacturers will eliminate R-
134a A/C systems by 2011. Tech B says the United Sates will switch to
R-22 in 2015. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - ANS ✔A. A only
A/C and Heating
, 2
A/C
Tech A says an A/C system using CO2 (carbon dioxide) for a
refrigerant will not contribute to global warming and is
environmentally friendly. Tech B says CO2 refrigerant does not need
to be recovered and recycled. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - ANS ✔C. Both A and B
The refrigerant is at its lowest pressure and temperature at
the___________________. - ANS ✔Evaporator orifice (inlet)
Tech A says the compressor can pump both liquid and vapor. Tech B
says the compressor is driven off the crankshaft by a belt. who is
correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - ANS ✔B. B only
variable displacement compressors are normally______ compressors
with a pivoting wobble plate. - ANS ✔Axial
Tech A says the magnetic clutch is usually pressure controlled, cycling
the compressor on and off to regulate system temperature or
pressure. Tech B says the clutch operates continually when the system
is turned on. Who is correct?
A. A only
B. B only
A/C and Heating
, 3
A/C
C. Both A and B
D. Neither A nor B - ANS ✔C. Both A and B
Tech A says a hybrid vehicle has a large reservoir of liquid refrigerant
to keep the passenger compartment cool during long periods when
the engine is shut down. Tech B says hybrid vehicles have electrically
driven A/C compressors. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - ANS ✔B. B only
Tech A says hybrid vehicles use electrically driven A/C compressors.
Tech B says the compressors for hybrids use the same refrigerant oil
as regular vehicles. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - ANS ✔A. A only
A sub cooler is located _____________________. - ANS ✔At the bottom of the
condenser
The purpose of the desiccant bag in the receiver/dryer or
accumulator is to_____________. - ANS ✔Absorb moisture inside the system
A/C and Heating
A/C
A/C and Heating Certification Test
Exam Questions with Correct Verified
Solutions 100% Guaranteed Pass
If little or no resistance is felt while operating the temperature
control lever, the problem is most likely _____________________. - ANS
✔The control cables have slipped loose from the dash control or door arm.
The boiling point of a liquid increases as_______________. - ANS ✔The
pressure applied to it increases
True or False? Water vaporizes into steam at 212 degrees Fahrenheit.
- ANS ✔True
Before 1994, most manufacturers used __________ as a refrigerant. - ANS
✔R-12
Tech A says European and Japanese manufacturers will eliminate R-
134a A/C systems by 2011. Tech B says the United Sates will switch to
R-22 in 2015. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - ANS ✔A. A only
A/C and Heating
, 2
A/C
Tech A says an A/C system using CO2 (carbon dioxide) for a
refrigerant will not contribute to global warming and is
environmentally friendly. Tech B says CO2 refrigerant does not need
to be recovered and recycled. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - ANS ✔C. Both A and B
The refrigerant is at its lowest pressure and temperature at
the___________________. - ANS ✔Evaporator orifice (inlet)
Tech A says the compressor can pump both liquid and vapor. Tech B
says the compressor is driven off the crankshaft by a belt. who is
correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - ANS ✔B. B only
variable displacement compressors are normally______ compressors
with a pivoting wobble plate. - ANS ✔Axial
Tech A says the magnetic clutch is usually pressure controlled, cycling
the compressor on and off to regulate system temperature or
pressure. Tech B says the clutch operates continually when the system
is turned on. Who is correct?
A. A only
B. B only
A/C and Heating
, 3
A/C
C. Both A and B
D. Neither A nor B - ANS ✔C. Both A and B
Tech A says a hybrid vehicle has a large reservoir of liquid refrigerant
to keep the passenger compartment cool during long periods when
the engine is shut down. Tech B says hybrid vehicles have electrically
driven A/C compressors. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - ANS ✔B. B only
Tech A says hybrid vehicles use electrically driven A/C compressors.
Tech B says the compressors for hybrids use the same refrigerant oil
as regular vehicles. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - ANS ✔A. A only
A sub cooler is located _____________________. - ANS ✔At the bottom of the
condenser
The purpose of the desiccant bag in the receiver/dryer or
accumulator is to_____________. - ANS ✔Absorb moisture inside the system
A/C and Heating
