COMPRESSOR AND MOTORS - Practice Mode

1) Which movement of the scroll compresses the low pressure vapour in scroll compressor?

Reciprocating Centrifugal Rotating Orbital

Correct Answer: Orbital

2) Which capacitor is disconnected by relay in capacitor start and induction run motor?

Starting capacitor Running capacitor Boosting capacitor Power factor correction capacitor

Correct Answer: Starting capacitor

3) What is the formula to find out the synchronous speed of induction motor?

Ns=(150P/f) Ns=(120f/P) Ns=(150f/P) Ns=(120P/f)

Correct Answer: Ns=(120f/P)

4) How to change the direction of rotation in 3 Phase induction motor?

Change neutral Change all phase Change any two phase Change the winding only

Correct Answer: Change any two phase

5) How the difference between the synchronous speed and the actual rotor speed is specified?

Lead Lag Slip Trip

Correct Answer: Slip

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