Deck 1: History of Hvac

Question 1

Technicians will use an electronic weigh scale to:

A) Weigh the amount of antifreeze in the engine cooling system
B) Weigh the amount of engine oil during routine maintenance
C) Weigh the amount of refrigerant dispensed into the air conditioning system
D) Weigh the output of the vehicles charging system

Answer 1

C

Question 2

An orifice tube is an example of a:

A) Heat exchanger
B) Pressure regulating device
C) Temperature regulating device
D) Responsible to raise the pressure of the refrigerant as it passes through

Answer 2

B

Question 3

The receiver drier is a component used to:

A) Turn liquid refrigerant into vaporous refrigerant
B) Dry the air the is routed through the evaporator
C) Separate and store liquid refrigerant
D) Direct only vaporous refrigerant to the TXV

Answer 3

D

Question 4

The accumulator used in an air conditioning system:

A) Is used to store vaporous refrigerant
B) Is used to prevent liquid refrigerant from returning to the compressor
C) Is used to remove oil from the circulation refrigerant
D) Is used to store all the refrigerant from the air conditioning system

Question 5

An antifreeze recycling machine are used:

A) Dispose of used engine coolant
B) Remove contaminants from the coolant
C) Restore the antifreeze to the properties it was when it was new
D) Both B and C are correct

Question 6

When refrigerant enters the evaporator it:

A) It is under very high pressure
B) Is in a purely vaporous state
C) Is extremely hot to the touch
D) Is a low pressure liquid

Question 7

The manifold gauge set is a tool used to:

A) measure the temperature of the refrigerant
B) measure the operating pressure of the refrigeration system
C) measure the engine intake manifold pressure
D) measure the engine exhaust manifold pressure

Question 8

A thermostatic expansion valve:

A) Has no moving parts
B) Is positioned between the compressor and the condenser
C) Regulates the flow of refrigerant into the evaporator
D) Can only sense refrigerant pressure

Question 9

Which of the following statements is true?

A) The compressor pumps liquid refrigerant
B) The compressor is a dividing point between the high pressure side and the low pressure side.
C) The compressor is designed to compress liquid refrigerant
D) The compressor can be damaged by pumping refrigerant vapor

Question 10

All technicians working with refrigerant part of the trucks air condition system must be:

A) Trustworthy
B) Honest
C) Certified
D) Careful

Question 11

The condenser is a component that:

A) Transforms liquid refrigerant into vaporous refrigerant
B) Is always located behind the trucks radiator
C) Receives cold liquid refrigerant from the compressor
D) Is responsible to remove the heat that was once inside the truck cab.

Question 12

The evaporator used in a truck air conditioning system is:

A) Usually located in front of the vehicles radiator
B) In some way isolated from the ambient air
C) Responsible for heating the air within the vehicle cab
D) Not a type of heat exchanger

Question 13

A vacuum pump is used by a technician to:

A) Remove air from the system after repairs have been performed
B) Remove moisture from the system after repairs have been performed
C) Remove refrigerant from the air conditioning system
D) Both A and B are correct

Question 14

An air conditioning system must be capable of removing heat from the cab of the vehicle at a faster rate than:

A) The radiator
B) The intercooler
C) The other heat sources infiltrating the cab
D) The heat coming in for an open window

Question 15

When a vehicles air conditioning is turned on to lower the temperature of the vehicle there is the added benefit of ___________?

A) Dehumidification
B) Humidification
C) Static discharge removal
D) Greater fuel mileage