Aux 2 Unit 9 Quiz 4

Aux 2 Unit 9 Q4

1 / 9

How should the refrigerant cylinder be positioned during vapor re-charging?

C) Horizontally for even flow

D) At an angle to control the flow rate

A) Vertically with the valve up to allow vapor withdrawal

B) Upside down to allow liquid charging

2 / 9

Why is it necessary to check for leaks before re-charging a refrigeration plant?

C) To reduce the cooling efficiency

A) To increase the pressure in the system

D) To keep the refrigerant warm

B) To ensure refrigerant does not escape during charging

3 / 9

What step should be taken to ensure the refrigerant enters the system at the correct rate?

C) Use an external pump to force refrigerant in

B) Adjust the charging valve gradually and monitor the system pressure

D) Increase the temperature of the refrigerant cylinder

A) Open the valve fully and charge quickly

4 / 9

Why is it important to wear proper personal protective equipment (PPE) during the re-charging process?

C) To reduce noise levels in the work area

A) To maintain a professional appearance

D) To prevent accidental electrical shock

B) To protect against potential exposure to refrigerant and ensure safety

5 / 9

What should be monitored during the charging process to ensure proper system function?

B) System temperature and pressure readings

A) Compressor noise levels

C) Fan speed in the condenser

D) Ambient room temperature

6 / 9

What is the purpose of running the system briefly after the initial charge?

B) To check for refrigerant leaks and confirm pressure stabilization

C) To warm up the system components

D) To accelerate the charging process

A) To reduce the refrigerant charge level

7 / 9

At what point should the vapor charging hose be connected to the system?

C) Before checking the system pressure

B) After ensuring the system is isolated and there are no leaks

A) While the system is running at full capacity

D) When the compressor is operating at maximum speed

8 / 9

What should be done if the system shows signs of overcharging during the process?

A) Increase the charge rate

C) Shut down the system and leave it as is

B) Remove excess refrigerant carefully and check pressure levels

D) Adjust the expansion valve to compensate

9 / 9

What is the first step before starting the vapor re-charging of a refrigeration plant?

C) Add lubricant to the compressor

D) Increase the system pressure using an external pump

B) Shut down the system and ensure it is isolated

A) Open all system valves to full

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