Aux 1 Unit 6 Q5

1 / 8

Under what conditions would a fusible plug on the compressor discharge typically operate?

A) When the compressor’s pressure is too low

D) When there is excess moisture in the compressed air

C) When the compressor speed is too high

B) When the temperature in the discharge line exceeds the plug's melting point

2 / 8

What is the purpose of a bursting disc on a water-cooled air compressor?

C) To increase the cooling efficiency of the compressor

A) To automatically shut down the compressor when it overheats

B) To provide a fail-safe release of pressure if the system pressure exceeds the design limit, preventing overpressure conditions

3 / 8

In what situation would a fusible plug on an air receiver activate?

B) When the temperature inside the air receiver exceeds the melting point of the plug

D) When there is a leak in the air receiver

C) When the air receiver is overfilled with compressed air

A) When the air pressure is too low

4 / 8

Where is a bursting disc typically located on a water-cooled air compressor?

A) On the cooling water inlet

B) On the high-pressure side of the compressor, such as the discharge line or after the final compression stage

C) On the compressor's electrical control panel

5 / 8

What is the purpose of a fusible plug on an air receiver in a compressed air system?

B) To release air automatically if the temperature inside the air receiver becomes too high, preventing potential explosion

C) To monitor the pressure inside the air receiver

A) To increase the air storage capacity of the receiver

D) To filter out water from the compressed air

6 / 8

What is the primary purpose of a fusible plug on the compressor discharge in a compressed air system?

C) To filter out impurities from the compressed air

A) To increase the pressure of the compressed air

D) To monitor the flow rate of the compressed air

B) To act as a temperature-sensitive safety device that melts and releases air if the discharge temperature becomes dangerously high

7 / 8

What happens to the bursting disc once it operates in a water-cooled air compressor system?

C) It temporarily reduces the compressor's speed

A) It resets automatically after releasing pressure

D) It increases the pressure in the cooling water circuit

B) It permanently ruptures and must be replaced before the compressor can be safely operated again

8 / 8

Why is it important to have a fusible plug on the compressor discharge line?

D) To increase the efficiency of the compressor

A) To prevent the compressor from operating at low temperatures

B) To protect the compressor and downstream components from damage due to overheating

C) To reduce the noise generated by the compressed air system

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