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Block 12v2

Total questions: 47

Worksheet time: 24mins

Name
Class
Date
1.

The receiver of the A/M32C-5 holds ___ IBS of liquid refrigerant for operation

a)

50

b)

100

c)

75

d)

25

2.

The ___ will ensure only liquid refrigerant is drawn from the receiver

a)

Dip Tube

b)

Sight Glass

c)

Compressor

d)

Evaporator

3.

What component provides a way to visually observe the flow and condition of the liquid refrigerant

a)

Dip Tube

b)

Sight Glass

c)

Sight Tube

d)

Evaporator

4.

The receiver is only filled to 80% to leave room from ____

a)

Thermal expansion

b)

Maintenance or Cleaning

c)

Air Circulation

d)

Flash Gas

5.

Relief Valve opens at ____

a)

450 PSI

b)

350 PSI

c)

35 PSI

d)

290 PSI

6.

Which of the following describes the function of the front-seated position of the manual service valve?

a)

Valve Up, used during normal operations (isolates charge port)

b)

Valve Down, Used to isolate receiver for maintenance

c)

4 turns back from seated position, used to remove or charge system with refrigerant

d)

Used to remove liquid refrigerant from receiver

7.

Which of the following describes the function of the back-seated position of the manual service valve?

a)

Valve Up, used during normal operations (isolates charge port)

b)

Valve Down, Used to isolate receiver for maintenance

c)

4 turns back from seated position, used to remove or charge system with refrigerant

d)

Used to remove liquid refrigerant from receiver

8.

Which of the following describes the function of the gauge position of the manual service valve?

a)

Valve Up, used during normal operations (isolates charge port)

b)

Valve Down, Used to isolate receiver for maintenance

c)

4 turns back from seated position, used to remove or charge system with refrigerant

d)

Used to remove liquid refrigerant from receiver

9.

What is used to add liquid refrigerant to the receiver

a)

High Side Charging Port (Receiver Inlet)

b)

Receiver Outlet Valve

c)

Sub-Cooler Coil

d)

Compressor

10.

What is used to remove liquid refrigerant to the receiver

a)

High Side Charging Port (Receiver Inlet)

b)

Receiver Outlet Valve

c)

Sub-Cooler Coil

d)

Compressor

11.

___ uses condenser fan to draw ambient air across the coils and ensures only liquid refrigerant goes to the evaporator and prevents flash gas

a)

Sub-Cooler Coil

b)

Evaporator Coils

c)

Compressor

d)

Filter/Drier

12.

___ removes moisture & foreign particles from liquid refrigerant

a)

Sub-Cooler Coil

b)

Evaporator Coils

c)

Compressor

d)

Filter/Drier

13.

What 3 things does the Filter/Drier prevent?

a)

Icing of Expansion Valve, Hydrofluoric acid formation, Corrosion of system tubing

b)

Refrigerant leaks, system overheating, compressor wear

c)

Excess pressure buildup, moisture accumulation, improper lubrication

d)

Blockage of refrigerant flow, oil contamination, freezing of refrigerant

14.

____ prevents migration of liquid refrigerant into compressors in the event of a sudden electrical power outage during operation

a)

Filter/Drier

b)

TXV Solenoid Valve

c)

Sight Glass

d)

Evaporator

15.

What meters the amount of liquid refrigerant entering evaporator

a)

Expansion Valve

b)

Evaporator Gauge

c)

Refrigerant Gauge

d)

Compressor

16.

The expansion valve changes ___ to ___ to absorb heat in evaporator

a)

HPL to LPL

b)

LPL to HPL

c)

HPG to LPG

d)

LPG to HPG

17.

Expansion valve ______ & _____ of liquid refrigerant

a)

Lowers pressure & temperature

b)

Increases pressure & temperature

c)

Supply’s & Cleaning

d)

Removes & Cleaning

18.

Expansion valve position is controlled by?

a)

B7

b)

R1

c)

TT3

d)

TC

19.

____ receives information from 5 components

a)

B7

b)

R1

c)

TT3

d)

TC

20.

TC receives information from what 5 components to manage the refrigerant process

a)

PT1, R1, TT1, TT2, TT3

b)

PT1, PT2, R1, B7, TT1

c)

B7, R1, TT1, TT2, TT3

d)

PT1, PT2, R1, B7, S4

21.

____ is used by the operator to set desired output air temperature

a)

B7

b)

R1

c)

TT3

d)

TC

22.

____ measures air temperature entering the evaporator

a)

B7

b)

TT2

c)

TT3

d)

TT1

23.

____ measures air temperature leaving the evaporator

a)

B7

b)

TT2

c)

TT3

d)

TT1

24.

____ measures refrigerant suction temperature leaving evaporator

a)

B7

b)

TT2

c)

TT3

d)

TT1

25.

____ is a pressure transducer that measures refrigerant suction pressure

a)

PT1

b)

TT2

c)

TT3

d)

TC

26.

What are the 4 sub systems that the Electronic Temperature Control controls

a)

Compressors, B7, V1, S1

b)

Compressors, B7, S1, TT1

c)

PT1, R1, TT1, TT2, TT3

d)

V1, S1, S4, B7

27.

___ refrigerant enters evaporator coil from expansion valve

a)

LPL

b)

HPL

c)

LPG

d)

HPG

28.

____ is directed across the outside of evaporator coil

a)

Ambient air

b)

Refrigerant

c)

Heat

d)

Coolant

29.

LPL absorbs heat, causing it to ___ within the evaporator coil

a)

Boil into a LPG

b)

Boil into a HPG

c)

Boil into a HPL

d)

Stay cooled as a LPL

30.

___ continues to absorb ___ as it flows through the evaporator coil

a)

LPG, Superheat

b)

LPL, Superheat

c)

HPG, Coolant

d)

LPG, Coolant

31.

What are the 4 heat load factors

a)

Humidity, Amount of air cooled, Starting air temperature & Desired air temperature

b)

Air circulation rate, system efficiency, external temperature, heat source proximity

c)

Humidity, insulation quality, equipment size, airflow direction

d)

Temperature, Circulation, Humidity & Purity

32.

What valve is used to isolate the compressors

a)

Relief Valve

b)

Isolation Valve

c)

Compressor Inlet & Outlet Vlaves

d)

Quench Valve

33.

____ increase the pressure & temperature of refrigerant gas so it will condense at ambient temperature (LPG to HPG)

a)

Compressors

b)

Evaporator

c)

Expansion Valve

d)

Pumpdown

34.

What separates oil from gas refrigerant and returns oil to inlet side of compressor

a)

Filter/Drier

b)

Oil Separator

c)

Sub-cooler

d)

Gas Separator

35.

____ from compressors enters 2 condenser coils

a)

Superheated HPL

b)

Superheated HPG

c)

Superheated LPG

d)

Superheated LPL

36.

High Pressure Cutout (HPCO) opens at 290 psi of refrigerant discharge pressure to shut off ____

a)

Both Compressors

b)

Condenser Fan

c)

Electronic Temperature Controller

d)

Sub-Cooler

37.

Quench Valve senses refrigerant discharge temperature using a ____

a)

Sensing Bulb

b)

Meter

c)

Color changing dot

d)

Thermometer

38.

Quench valve prevents?

a)

Thermal Breakdown of compressor Oil

b)

Overheating of the refrigerant system

c)

Excessive pressure in the discharge line

d)

Moisture contamination in the system

39.

Thermal Break down of compressor oil starts at?

a)

200°F

b)

150°F

c)

250°F

d)

75°F

40.

____ is controlled by TC to keep suction pressure above 28 psi during normal operation

a)

High Pressure Cutout (HPCO)

b)

Hot Gas Bypass Valve (HGBP) & S1

c)

Condenser Fan Cycle Switch

d)

Low Pressure Cutout (LPCO)

41.

____ will prevent low side of the system from being drawn into a vacuum, preventing inward leaks

a)

High Pressure Cutout (HPCO)

b)

Hot Gas Bypass Valve (HGBP) & S1

c)

Condenser Fan Cycle Switch

d)

Low Pressure Cutout (LPCO)

42.

LPCO stops the compressor when suction pressure drops to ___

a)

5 psi

b)

10 psi

c)

8 psi

d)

12 psi

43.

____ is used by TC to determine pump down effectiveness

a)

HGBP

b)

HPCO

c)

LPCO

d)

Quench Valve

44.

What term is used to describe the amount of heat energy that needs to be moved in order to achieve the desired outcome?

a)

Flash Gas

b)

Superheat

c)

Heat Load

d)

Humidity

45.

What provides the temperature suction pressure information

a)

PT1

b)

TT2

c)

TT3

d)

TC

46.

The A/M32C-5 uses 2 hermetically sealed ____ to increase the temperature and pressure of the vapor refrigerant

a)

Expansion Valve

b)

Condenser Coil

c)

Compressors

d)

Condenser fans

47.

The A/M32C-5 has two ____ that will allow heat to be extracted from the superheated, high pressure refrigerant vapor causing a change in state from a vapor to a high pressure liquid

a)

Expansion Valve

b)

Condenser Coil

c)

Compressors

d)

Condenser fans