D.C. Motors MCQ Questions & Answers | Electrical Engineering

A. Lathe machine

B. Centrifugal pump

C. Locomotive

D. Air blower

A. The speed of motor will be reduced %

B. The armature current will reduce

C. The motor will attain dangerously high speed 1

D. The motor will continue to run at constant speed

A. Providing laminations in armature core

B. Providing laminations in stator

C. Using nonmagnetic material for frame

D. Using material of low hysteresis coefficient for armature core material

A. Mechanical loss

B. Core loss

C. Copper loss

D. All of the above

A. Frequency of magnetic reversals

B. Maximum value of flux density

C. Volume and grade of iron

D. Rate of flow of ventilating air