Electrical Engineering MCQs

3699 MCQs  — Computer Programming MCQs  (Page 363 of 370)

Attempt Electrical Engineering Mcqs Quiz
The voltage regulation in magnetic amplifier type voltage regulator is effected by__________?
A. electromagnetic induction
B. varying the resistance
C. varying the reactance
D. variable transformer
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The frequency of voltage generated, in case of generators, can be increased by___________?
A. using reactors
B. increasing the load
C. adjusting the governor
D. reducing the terminal voltage
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When an alternator connected to the bus-bar is shut down the bus-bar voltage will___________?
A. fall
B. rise
C. remain unchanged
D. none of the above
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The angular displacement between two interconnected stations is mainly due to___________?
A. armature reactance of both alternators
B. reactance of the interconnector
C. synchronous reactance of both the alternators
D. all of the above
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For transmission of power over a distance of 500 km, the transmission voltage should be in the range?
A. 150 to 220 kv
B. 100 to 120 kv
C. 60 to 100 kv
D. 20 to 50 kv
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In the analysis of which of the following lines shunt capacitance is neglected?
A. short transmission lines
B. medium transmission lines
C. long transmission lines
D. medium as well as long transmission lines
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When the interconnector between two stations has large reactance?
A. the transfer of power will take place with voltage fluctuation and nosie
B. the transfer of power will take place with least loss
C. the stations will fall out of step be¬cause of large angular displacement between the stations
D. none of the above
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Constant voltage transmission entails the following disadvantage?
A. large conductor area is required for same power transmission
B. short-circuit current of the system is increased
C. either of the above
D. none of the above
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On which of the following factors skin effect depends?
A. frequency of the current
B. size of the conductor
C. resistivity of the conductor material
D. all of the above
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The effect of corona can be detected by___________?
A. presence of ozone detected by odour
B. hissing sound
C. faint luminous glow of bluish colour
D. all of the above
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Word of the Day
12 Jul
Obdurate
stubbornly refusing to change one’s opinion or course of action.
ضدی، بدکار، سنگدلی

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