ELECTRICIAN (THEORY) SEMESTER - II JULY 2018 NSQF

ELECTRICIAN (THEORY) SEMESTER - II JULY 2018 NSQF

How the capacity of battery is specified?

a)Volt

b) Watt

c) Volt Ampere

d) Ampere hour

Answer : d) Ampere hour

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What is the name of defect that bending of plates in secondary cells?
a) Partial short

b) Local action

c) Buckling

d) Hard sulphation

Answer : c) Buckling

Which type of transformer is used for high frequency application?

a) Ring core transformer

b) Ferrite core transformer

c) Silicon steel core transformer

d) Grain oriented core transformer

Answer : b) Ferrite core transformer

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What is the function of conservator in transformer?

a) Allows expansion of oil level due to load variation

b) Transfers the heat to atmosphere

c) Allows to release internal pressure

d) Prevents the moisture entry

Answer : a) Allows expansion of oil level due to load variation

Which loss of transformer is determined by short circuit test?
a) Eddy current loss

b) Windage loss

c) Hysteresis loss

d) Copper loss

Answer : d) Copper loss

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Calculate the voltage regulation in percentage of the

transformer if the no load voltage is 240 volt and full load

voltage is 220 volt?

a) 7.2%

b) 9.09%

c) 8.71%

d) 8.3%

Answer :

What is the purpose of using laminated core in transformer?

a) Reduce eddy current loss

b) Reduce hysteresis loss

c) Reduce mechanical loss

d) Reduce copper loss

Answer : a) Reduce eddy current loss

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What is the S.I unit of luminous intensity?

a) Lux

b) Lumen

c) Candela

d) Steradian

Answer : c) Candela

Which force is required to move the pointer

from zero position in an indicating instrument?

a) Deflecting force

b) Controlling force

c) Air friction damping

d) Eddy current damping

Answer : a) Deflecting force

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Which is the position to use the instrument

provided with gravity control?
a) Any position

b) Vertical position

c) Inclined position

d) Horizontal position

Answer :  b) Vertical position

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Which error is caused by the incorrect position of

 instrument reading?
a) Device error

b) Human error

c) Influence error

d) Switching error

Answer :  a) Device error

Which instrument is used to measure one

ohm and below one ohm resistance value
accurately?

a) Megohm meter

b) Shunt type ohm meter

c) Multimeter (analog)

d) Series type ohm meter

Answer :  b) Shunt type ohm meter

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What is the purpose of the 3 terminal provided in a advanced megohm meter?

a) Get higher ohmic values

b) Get accurate readings without oscillation

c) Pass the excess current to ground

d) Pass the excess voltage to ground

Answer :  b) Get accurate readings without oscillation

Which material is used to make heating element?
a) Silver

b) Copper

c) Nichrome

d) Aluminium

Answer : c) Nichrome

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Which material is coated in tungsten electrode

of a fluorescent tube lamp?
a) Barium and stroatium oxide

b) Phosphor powder

c) Fluorescent powder

d) Silver oxide

Answer : a) Barium and stroatium oxide

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Which position MB type high pressure mercury

vapour lamps are operated?
a) Any position

b) Inclined

c) Horizontal

d) Vertical

Answer : a) Any position

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What is the function of leak transformer in

high pressure sodium vapour lamp circuit?
a) Ignite the high voltage initially       

b) Reduce the working voltage
c) Increase the working voltage

d) Reduce the starting current

Answer : a) Ignite the high voltage initially

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How stroboscope effect in industrial twin tube light

fitting is reduced?

a) Connecting capacitor parallel to supply

b) Connecting capacitor in series with one tube light

c) Connecting capacitor in series with supply

d) Connecting two capacitors in series to each tube light

 Answer :

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What is the function of stirrer motor in micro wave oven?

a) Draws cooling air inside

b) Revolves and reflects the electromagnetic energy

c) Exhausts the hot air outside

d) Spreads the heat uniformly

 Answer : b) Revolves and reflects the electromagnetic energy

Which type of A.C single phase motor is used in food mixer?
a) Universal motor

b) Repulsion motor

c) Spl it phase motor

d) Shaded pole motor

Answer :  a) Universal motor

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What is the minimum size of Aluminum earth

continuity conductor used in single phase domestic

wiring as per BIS?

a) 3Sq.mm

b) 3.5Sq.mm
c) 2.5Sq.mm

d) 1.5Sq.mm

Answer :  c) 2.5Sq.mm

How the conduit pipes are specified?

a) Length in metre

b) Outer diameter in mm
c) Inner diameter in mm

d) Wall thickness in mm

Answer :  b) Outer diameter in mm

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What is the fusing factor for rewireable fuse?
a) 1.1

b) 2.1
c) l.4

d) 2.5

Answer :  c) l.4

What is the purpose of underwriter's knot for

pendent holder connection?

a) Reduce the strain from the terminals of accessories

b) Increase mechanical strength

c) Prevent excessive cap cover pressure

d) Avoid loose connections

Answer :  a) Reduce the strain from the terminals

                     of accessories

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Which device converts sunlight into electrical energy?

a) Light emitting diode

b) Liquid crystal diode

c) Photo voltaic cell

d) Light dependent resistor

Answer :  c) Photo voltaic cell

Which type of load is protected by the L-series MCB?
a) Motors

b) Hand tools

c) Geyser

d) Air conditioner

Answer :  c) Geyser

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What is the effect of low current rated cable used

to connect higher current load?
a) Cable damage due to heat

b) Load current increases

c) Voltage drop decreases

d) Voltage drop increases

Answer :  a) Cable damage due to heat

How many two way switches with intermediate

switch are used to control one lamp from
three different places?

a) 1

b) 4

c) 3

d) 2

Answer :

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Which method is used to reduce earth resistance

value in a existing earth?

a) Increasing the length of electrode

b) Adding more sand and charcoal in earth pits

c) Keeping wet condition in earth pits always

d) Increasing the diameter of earth electrode

Answer :  c) Keeping wet condition in earth pits always

Why A.C is required to measure the earth resistance

by using earth resistance tester?
a) Regulate the current

b) Avoid electrolytic emf interference

c) Decrease the voltage drop

d) Increase the voltage drop

Answer :  b) Avoid electrolytic emf interference

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What is the advantage of concealed wiring?

a) Easy to maintain

b) Less voltage drop

c) High insulation resistance

d) Protection against moisture

Answer :  d) Protection against moisture

What is the maximum permissible load for

a power sub circuit as per I.E rules?
a) 800 Watt

b) 3000 Watt

c) 2000 Watt

d) 1500 Watt

Answer :   b) 3000 Watt

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Which location the service connection supply

leads to be connected at consumer main
boaid?

a) IC cut out

b) Main switch

c) Energy meter

d) Distribution board

Answer :  c) Energy meter

Which law secondary cell works?

a) Faradays laws of electromagnetic induction

b) Joule's law

c) Faradays laws of electrolysis

d) Lenz's law

Answer : 
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