Top 350+ Solved Electrical Machine 1 MCQ Questions Answer
Q. Armature coil is short circuited by brushes when it lies
a. along neutral axis
b. along field axis
c. in any of the above positions
d. in none of the above positions
Q. A cumulatively compounded long shunt generator when operating as a motor would be
a. cumulatively compounded long shunt
b. differentially compounded long shunt
c. cumulatively compounded short shunt
d. differentially compounded short shunt
Q. Number of tappings for each equilizer ring is equal to
a. number of pole pairs
b. number of poles
c. number of parallel paths
d. number of commutator segments
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. machine stray loss is the sum of
a. total copper loss and mechanical loss
b. armature copper loss and iron loss
c. shunt field copper loss and mechanical loss
d. iron loss and mechanical loss
Q. Lap 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. 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. An exciter for a turbo generator is a
a. separately excited generator
b. shunt generator
c. series generator
d. compound generator
Q. In case of a flat compounded generator
a. voltage generated is less than the rated voltage
b. generated voltage is proportional to the load on the generator
c. voltage remains constant irrespec¬tive of the load
d. speed varies in proportion to the load on the generator
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. In over compounded generator, full load terminal voltage is
a. almost zero
b. less than noload terminal voltage
c. more than noload terminal voltage
d. equal to no-load terminal voltage
Q. In a level compounded D.C. generator, full load terminal voltage is
a. negligibly low
b. equal to no-load terminal voltage
c. more than no-load terminal voltage
d. less than no-load terminal voltage
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