030/2020

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During rheostat breaking of DC series motors
A) Motor is reversed in direction

B) Motor is run as a generator

C) Motor is run at high speed

D) Motor is run at reduced speed

ACSR conductors could be joined by using
A) Oval shaped sleeves

B) Straight sleeve and nut connector

C) Compression sleeves

D) Universal P.G. clamp

How is the slip ring induction motor connected to the main ?
A) Supply to stator winding, rotor winding shorted through resistance
B) Supply to rotor winding, stator winding shorted

)
C) Rated voltage to stator winding, reduced voltage to rotor
D) Supply to both windings while starting, rotor winding disconnected after starting
Which one is used to generate power in geothermal station ?
A) Heat in the atmosphere
B) Heat inside the earth
C) Heat in the ionosphere
D) Heat of the sun

The no-volt coil is used as a protective device in a motor starter. What is its main

function ?

A) Prevent opening the supply circuit when fluctuation occurs in the power system
B) Open the supply circuit on failure or reduction of voltage, and automatically

reclose it on return of normal voltage

C) Open supply circuit upon failure or reduction of voltage and keep open until

manually closed
D) Control motor voltage and keep it at a safe value

Non-conductor of an overhead line, including service lines erected across a street

shall at any part there of, be at a height less than meters for high
voltage lines.

A) 5.486 B) 6.096

C) 5.791 D) 5.75

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