Which of the following motors is used in tape-recorders ?

Which one of the following is not necessarily the advantage of D.C. motors over A.C. motors?

A

Low cost

B

Wide speed range

C

Stability

D

High starting torque

Which of the following motors is used in mixies ?

A

Repulsion motor

B

Reluctance motor

C

Hysteresis motor

D

Universal motor

Which of the following motors is usually used in household refrigerators?

A

D.C. shunt motor

B

D.C. series motor

C

Single phase induction motor (split phase start or induction run motor)

D

Reluctance motor

Which of the following motors will be used in electric clocks ?

A

D.C. shunt motor

B

D.C. series motor

C

A.induction motor

D

A.C. synchronous motor

Which of the following motors is used in a situation where load increases with speed ?

A

Induction motor

B

Three-phase series motor

C

Schrage motor

D

Hysteresis motor

Which of the following single-phase induction motors is generally used in time phonographs?

A

Resistance start

B

Capacitor start capacitor run

C

Shaded pole

D

Universal

Which of the following motors is used for elevators?

A

Induction motor

B

Synchronous motor

C

Capacitor start single phase motor

D

Any of the above

A pony motor is used for the starting which of the following motors?

A

Squirrel cage induction motor

B

Schrage motor

C

Synchronous motor

D

None of the above

For crane travel which of the following motors is normally used?

A

Synchronous motor

B

D.C. differentially compound motor

C

Ward-Leonard controlled D.shunt motor

D

AC. slip ring motor

In squirrel cage induction motors which of the following methods of starting cannot be used?

A

Resistance in rotor circuit

B

Resistance in stator circuit

C

Autotransformer starting

D

Star-delta starting

Which of the following motors is used in tape-recorders ?

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