Electrical machine MCQ #11
1) Distribution transformer have core losses is
(a) equal to
copper loss
(b) less than
copper loss
(c) greater than
copper loss
(d) half of the copper
loss
2) Which part of the transformer is subjected to maximum
heating?
(a) winding
(b) core
(c) frame
(d) oil
3) A buchholz relay is used for the protection of the
transformer against
(a) LG fault
(b) external
fault
(c) both
internal and external fault
(d) all
internal fault
4) The winding used in shell type three phase transformer
is _____
(a) cylindrical
(b) circular
(c) sandwich
(d) rectangular
ANSWER: | 1-b | 2-a | 3-d | 4-c |
5) A distribution transformer is selected on the basis of
(a) efficiency
(b) all day
efficiency
(c) voltage
regulation
(d) none of the
above
6) Two transformers operating in parallel will share the
load depending upon them
(a) per unit
impedance
(b) leakage
reactance
(c) efficiency
(d) rating
7) Auto transformer can do the following
(a) step down
voltage
(b) step up
voltage
(c) voltage step
up and step down both
(d) power step
up
8) The number of poles on turbo alternator is usually
(a) 2
(b) 4
(c) 6
(d) 8
ANSWER: | 5-b | 6-a | 7-c | 8-a |
9) Which one of the following methods gives more accurate
results for determination of voltage regulation of an alternator?
(a) MMF method
(b) ASA method
(c) potier
triangle method
(d) synchronous impedance
method
10) A three-phase synchronous motor has
(a) low starting
current
(b) no
starting torque
(c) high starting
torque
(d) low starting
torque
11) During short circuit test on a synchronous motor
_____ is/are short circuited.
(a) all stator
phase winding
(b) field
terminals
(c) armature terminals
(d) one of the
stator phase winding
12) In a three-phase slip ring induction motor, the
brushes are connected to
(a) external
supply
(b) DC supply
(c) three-phase AC
supply
(d) equalizing coil
ANSWER: | 9-c | 10-b | 11-c | 12-a |
Electrical machine #6
Electrical machine #5
Electrical machine #4
Electrical machine #3
Electrical machine #2
Electrical machine #1
To download this as PDF click here
ELECTRICAL MACHINE MCQ PDF #11
Leave a Comment