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Refrigeration System Quiz

Total questions: 48

Worksheet time: 27mins

Name
Class
Date
1.

Refrigerants evaporate to release heat outside of the refrigerated space.

a)

True

b)

False

2.

The evaporation of a fluid is an indication that (a)   is being absorbed.

3.

Volume is decreased inside the compressor, causing an increase in pressure and _____.

a)

condensation

b)

evaporation

c)

molecules

d)

temperature

4.

The state of refrigerant that is capable of absorbing the most heat is _____.

a)

high-pressure liquid

b)

high-pressure vapor

c)

low-pressure liquid

d)

low-pressure vapor

5.

The high side of the refrigeration system is where heat is absorbed and removed from the refrigerated space.

a)

True

b)

False

6.

The high side of a refrigeration system is divided from the low side by the _____.

a)

liquid receiver

b)

condenser

c)

evaporator

d)

metering device

7.

Low-side pressure may also be called ____ pressure.

a)

condenser

b)

discharge

c)

head

d)

suction

8.

The reciprocating movement of a compressor piston ____.

a)

provides suction

b)

compresses the refrigerant

c)

Both A and B

d)

Neither A nor B

9.

Operational balance is reached when the number of vapor molecules that condense into liquid in the condenser equals the number of ____.

a)

liquid refrigerant molecules in the liquid receiver

b)

lubricant molecules returned to the crankcase

c)

liquid molecules needed to fill the evaporator

d)

vapor refrigerant molecules pumped by the compressor

10.

An oil separator uses ____, or screens, to separate oil from refrigerant vapors.

a)

baffles

b)

magnets

c)

pumps

d)

vacuums

11.

A condenser’s primary function in a system is to remove ____ heat from refrigerant.

a)

ambient

b)

compressor

c)

latent

d)

sensible

12.

Which type of water-cooled condenser consists of only two tubes with water flowing in one direction in one tube and refrigerant flowing in the opposite direction in the other tube?

a)

Forced-water

b)

Shell-and-coil

c)

Shell-and-tube

d)

Tube-within-a-tube

13.

The quantity of refrigerant in a system is less critical when the system has a(n) _____.

a)

A. liquid line solenoid valve

b)

B. liquid receiver

c)

C. oversized compressor

d)

D. refrigerant leak

14.

The _____ line connects the liquid receiver to the metering device.

a)

A. condensate

b)

B. discharge

c)

C. liquid

d)

D. suction

15.

A liquid line filter-drier can also be called a low-side filter-drier.

a)

True

b)

False

16.

A metering device is intended to provide _____ in liquid refrigerant's passage into the evaporator.

a)

A. filtration

b)

B. a restriction

c)

C. superheat

d)

D. All of the above

17.

The drop in pressure between the metering device and the evaporator _____ the boiling point of the refrigerant.

a)

A. does not change

b)

B. doubles

c)

C. lowers

d)

D. quadruples

18.

To create a cooling effect, an evaporator primarily absorbs _____ heat.

a)

A. adiabatic

b)

B. latent

c)

C. liquid

d)

D. sensible

19.

The term superheated means that the refrigerant is a liquid with a temperature below the boiling point.

a)

True

b)

False

20.

The purpose of a suction line filter-drier is to increase the pressure difference between the evaporator and the compressor.

a)

True

b)

False

21.

Match the letter corresponding to the name of the refrigeration system component to its description below. Not all letters will be used. The liquid refrigerant entering this component is under low pressure, which makes the liquid vaporize and absorb heat.

a)

B. Compressor

b)

E. Liquid line

c)

D. Evaporator

d)

A. Accumulator

e)

C. Condenser

22.

A device that removes oil from hot, compressed vapor.

a)

I. Oil separator

b)

A. Accumulator

c)

B. Compressor

d)

C. Condenser

e)

D. Evaporator

23.

The line carrying refrigerant from the evaporator to the compressor.

a)

J. Suction line

b)

A. Accumulator

c)

B. Compressor

d)

C. Condenser

e)

D. Evaporator

24.

In this component, heat is removed from the refrigerant vapor.

a)

B. Compressor

b)

A. Accumulator

c)

C. Condenser

d)

E. Liquid line

e)

D. Evaporator

25.

This component carries refrigerant from the condenser to the evaporator.

a)

A. Accumulator

b)

C. Condenser

c)

B. Compressor

d)

E. Liquid line

e)

D. Evaporator

26.

A safety device to prevent liquid refrigerant from entering the suction line and compressor.

a)

E. Liquid line

b)

A. Accumulator

c)

D. Evaporator

d)

B. Compressor

e)

C. Condenser

27.

This component prevents moisture, dirt, and metal chips from entering the metering device.

a)

C. Condenser

b)

B. Compressor

c)

A. Accumulator

d)

D. Evaporator

e)

F. Liquid line filter-drier

28.

This component controls liquid refrigerant flow into the evaporator.

a)

D. Evaporator

b)

C. Condenser

c)

B. Compressor

d)

A. Accumulator

e)

H. Metering device

29.

A ______ refrigerant is like a dry sponge that has the ability to soak up a lot of water.

a)

Low-pressure liquid

b)

Low-pressure vapor

c)

High-pressure liquid

d)

High-pressure vapor

30.

From the metering device through the evaporator to the compressor is the ______ side of the system.

a)

low

b)

high

c)

condensing

d)

heat-rejecting

31.

From the compressor exhaust through the condenser and liquid line to the metering device is the ______ side of the system.

a)

low

b)

high

c)

evaporative

d)

suction

32.

Using suction, a compressor draws in refrigerant by creating ______ in the evaporator.

a)

low pressure

b)

high pressure

c)

low temperatures

d)

high temperatures

33.

Using the process of compression, a compressor increases refrigerant ______.

a)

pressure and volume

b)

temperature and volume

c)

volume and heat content

d)

pressure and heat content

34.

Commonly used in different HVACR applications, ______ compressors use a back-and-forth or up-and-down motion.

a)

rotary

b)

scrolling

c)

reciprocating

d)

centrifugal

35.

A heat-exchanging device designed to expel or reject heat is a(n) ______.

a)

accumulator

b)

evaporator

c)

liquid receiver

d)

condenser

36.

A condenser that uses a fan to remove heat more quickly is called a ______ condenser.

a)

static

b)

forced-air

c)

natural-convection

d)

water-cooled

37.

Heat flow can best be described as

a)

flowing from hot areas to cold areas

b)

flowing from cold areas to hot areas

c)

remaining stationary unless forced to move

d)

remaining stationary regardless of forces around it

38.

A storage tank for liquid refrigerant on the high side of the system is a(n)

a)

accumulator

b)

condenser

c)

evaporator

d)

liquid receiver

39.

A refrigeration system with a(n) ______ metering device does not use a liquid receiver.

a)

capillary tube

b)

low-side float

c)

automatic expansion valve

d)

thermostatic expansion valve

40.

Into which tank can a technician pump a refrigeration system's entire refrigerant charge to perform service?

a)

Accumulator

b)

Evaporator

c)

Condenser

d)

Liquid receiver

41.

The high-pressure line between condenser and metering device is called the ______ line.

a)

condensing

b)

suction

c)

liquid

d)

discharge

42.

To protect a system from dirt, moisture, metal, and other debris, install a(n)

a)

accumulator

b)

filter-drier

c)

metering device

d)

oil separator

43.

A heat-exchanging device designed to absorb heat is a(n)

a)

accumulator

b)

evaporator

c)

liquid receiver

d)

condenser

44.

The instantaneous evaporation of liquid refrigerant in an evaporator is called

a)

absorbent

b)

subcooled liquid

c)

superheated vapor

d)

flash gas

45.

A storage tank that traps liquid refrigerant on the low side of the system is a(n)

a)

accumulator

b)

condenser

c)

evaporator

d)

liquid receiver

46.

An accumulator will function best with its inlet positioned ______ the tank.

a)

at the top of

b)

at the bottom of

c)

in the middle of

d)

anywhere on

47.

The low-pressure line is sometimes called the ______ line.

a)

condensing

b)

suction

c)

liquid

d)

discharge

48.

Draw the refrigeration cycle and indicate the flow of refrigerant in cool mode