Top 150+ Solved DC Generators MCQ Questions Answer
Q. Wave winding is composed of
a. any even number of conductors
b. any odd number of conductors
c. that even number which is exact multiple of poles + 2
d. that even number which is exact multiple of poles
Q. The critical resistance of the D.C. generator is the resistance of
a. field
b. brushes
c. armature
d. load
Q. When two D.C. series generators are running in parallel, an equilizer bar is used
a. to increase the speed and hence generated e.m.f.
b. to increase the series flux
c. so that two similar machines will pass approximately equal currents to the load
d. to reduce the combined effect of ar-mature reaction of both machines
Q. Which of the following generating machine will offer constant voltage on all loads ?
a. Self-excited generator
b. Separately excited generator
c. Level compounded generator .
d. All of the above
Q. Which of the following generators will be preferred if they are required to be run inparallel ?
a. Shunt generators
b. Series generators
c. Compound generators
d. None of the above
Q. Two generators are running in parallel. One of the generators may run as motor forwhich of the following reasons ?
a. The direction of that generator is reversed
b. The speed of that generator is increased
c. The field of that generator is weakened
d. That generator takes large share of loads
Q. A D.C. generator works on the principle of
a. Lenz's law
b. Ohm's law
c. Faraday's law of electromagnetic induction
d. none of the above
Q. A D.C. generator can be considered as
a. rectifier
b. primemover
c. rotating amplifier
d. power pump
Q. In any rotating machine that part which houses the conductors and inwhich e.m.f. induced is to be utilised is called
a. rotor
b. stator
c. field
d. armature
Q. In a D.C. generator in case the resistance of the field winding is increased, then output voltage will
a. increase
b. decrease
c. remain unaffected
d. fluctuate heavily
Q. Which of the following generator will have negligible terminal voltage while running on no-load ?
a. Series generator
b. Shunt generator
c. Compound generator
d. Separately excited generator
Q. Which of the following D.C. generators will be in a position to build up without any residual magnetism in the poles ?
a. Series generator
b. Shunt generator
c. Compound generator
d. None of the above
Q. The terminal voltage of a D.C. shunt generator drops on load because ofall of the following reasons except
a. armature reaction
b. armature resistance drop
c. field weakening due to armature reaction and armature
d. commut ation
Q. A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave
a. will be zero
b. will be of 5 Hz
c. willbeof5xiVHz
d. will be of v Hz 5
Q. A 220 V D.C. generator is run at full speed without any excitation. Theopen circuit voltage will be
a. zero
b. about 2 V
c. about 50 V
d. 220V