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

A. $$\frac{{\text{E}}}{2}$$

B. 2E

C. Slightly less than E

D. E

A. Multiplication of front and back pitches

B. Division of front pitch by back pitch

C. Sum of front and back pitches

D. Difference of front and back pitches

A. Demagnetization of leading pole tip and magnetization of trailing pole tip

B. Demagnetization of trailing pole tip and magnetization of leading pole tip

C. Demagnetizing the center of all poles

D. Magnetizing the center of all poles

A. Compensating winding in a D.C. machine helps in commutation

B. In a D. C. generator interpoles winding is connected in series with the armature winding

C. Back pitch and front pitch are both odd and approximately equal to the pole pitch

D. Equalizing bus bars are used with parallel running of D.C. shunt generators

A. Series generator

B. Shunt generator

C. Compound generator

D. Self-excited generator

A. Insulation failure between two commutator bars

B. Insulation failure between two turns of a coil

C. Two of more turns of the same coil getting grounded

D. All of the above

A. size of air gap

B. shape of the pole shoe

C. clearance between tips of the adjacent pole shoes

D. all of the above

A. Severe sparking

B. Rough commutator surface

C. Imperfect contact

D. Any of the above

A. r.p.m. is more than 300

B. r.p.m. is less than 300

C. Number of poles is 4

D. Number of poles is 2

A. Copper is harder than mica

B. Mica and copper are equally hard

C. Mica is harder than copper

D. None of the above