1000+ DC Motor Objective Questions and Answers Pdf - 2

Question: 6

Which D.C. motor will be preferred for machine tools?

(A) differential compound motor

(B) cumulative compound motor

(C) shunt motor

(D) series motor

Question: 7

These days D.C. motors are widely used in

(A) machine shops

(B) electric traction

(C) air compressors

(D) pumping sets

Question: 8

A three point starter is considered suitable for

(A) shunt as well as compound motors

(B) shunt motors

(C) shunt, compound and series motors

(D) all D.C. motors

Question: 9

For which of the following applications a D.C. motor is preferred over an A.C. motor?

(A) fixed speed operation

(B) variable speed operation

(C) low speed operation

(D) high speed operation

Question: 10

The hysteresis loss in a D.C. machine least depends on

(A) rate of flow of ventilating air

(B) volume and grade of iron

(C) maximum value of flux density

(D) frequency of magnetic reversals