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HAC 101 Midterm 27OCT23

Authored by Robert Vaughn

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HAC 101 Midterm 27OCT23
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20 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

1.     The sun's heat travels by:

conduction
convection
absorption
radiation

2.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

1.     Tech A says that heat is removed from the passenger compartment by the heater core. Tech B says that heat in the cab is removed through by the refrigerant and is released to the outside air at the condenser. Who is correct?

Tech B
Neither Tech A nor Tech B
Both Tech A and Tech B
Tech A

3.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

1.     When the air-conditioning compressor clutch is ________, the pulley attached via a belt to the crankshaft can spin freely.

engaged
locked
stuck
disengaged

4.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

1.     The purpose of the evaporator in the A/C system is to do all the following EXCEPT:

Select one:

 

a.      transform liquid refrigerant to a gas.

b.     remove the heat from the inside of the cabin.

c.      cause conduction of heat through the blower motor.

d.     remove humidity form the air inside of the cabin.

5.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Absolute Zero is the temperature at which all molecular activity theoretically :

decreases
increases
remains constant
stops

6.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

1.     The thermal expansion valve device lowers the pressure of the warm, high-pressure liquid refrigerant entering the ___________.

condenser
compressor
evaporator
accumulator

7.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

1.     Which of these holds true for H-Valve thermal expansion valve (TXV) operation?

Select one:

 

a.  TVX meters the refrigerant into the evaporator at a variable rate.

b.  It maintains the evaporator at low temperature and pressure.

c.  Spring tension acting on the orifice ball regulates the quality of refrigerant flow.

d.  Inlet temperature also can change the position of the linkage.

c
d
b
a

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