Practice MCQ Questions and answers on Electrical Machines Test Questions

A. Voltage

B. Frequency

C. Both (a) and (b)

D. None of these

A. Variable losses

B. Constant losses

C. Both (a) or (b)

D. None of these

A. Synchronous machines

B. D.C. machines

C. Induction machines

D. Equal in all types of machines

A. Inversely proportional to the square of current

B. Directly proportional to the square of current

C. Inversely proportional to the current

D. Directly proportional to the current

A. Electrical power developed in armature – copper losses

B. Mechanical power input – iron and friction losses

C. Electrical power developed in armature – iron and copper losses

D. Mechanical power input – iron and friction losses – copper losses

A. Electrical power input to motor – copper losses

B. Motor output + iron and friction losses

C. Both (a) & (b)

D. None of these

A. All are equal

B. Electrical losses

C. Magnetic losses

D. Mechanical losses

A. Of its extremely steady torque

B. Constant speed

C. Reduced initial current

D. None of these

A. 2156.7 W, 200 W

B. 2232.6 W, 200 W

C. 2156.7 W, 240 W

D. 2232.6 W, 240 W

A. 91.35 %

B. 92.60 %

C. 93.30 %

D. 94.23 %