COMPRESSOR AND MOTORS - Practice Mode

1) Which cooling medium is used to cool the motor of a hermetic reciprocating compressor in AC?

Discharge vapour Liquid refrigerant Suction vapour Water

Correct Answer: Suction vapour

2) What is the method of starting a 3 phase slip ring induction motor?

With starting relay Using starting capacitor With running capacitor Adding resistance to rotor winding

Correct Answer: Adding resistance to rotor winding

3) Which is used to connect the rotor bars in 3phase squirrel cage induction motor?

Screw Welded End ring Nut and bolt

Correct Answer: End ring

4) What is the use of a starting capacitor in single phase induction motor?

Improve power factor Increase starting torque Decrease starting torque Dis connect starting winding

Correct Answer: Increase starting torque

5) What is the advantage of a hermetically sealed compressor in refrigerator?

Silent operation Easily serviceable Noise is more Cost is high

Correct Answer: Silent operation

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