UPPCL JE ELECTRICAL ENGG . PREVIOUS YEAR 2016 QUESTIONS WITH EXPLANATIONS
Q NO 1. Ceramics do not possess :
a ) high melting point
b ) brittleness
c ) hardness
d ) electrical conduction
explanations :
answer ; d ) electrical conduction
Q NO 2 .Ohm's law is followed by :
a ) metal rectifer
b ) copper electrode
c ) crystal detector
d ) arc lamp
explanations :
answer : b ) copper electrode
Q NO 3 . solar energy cannot be used in which of the following ?
a ) energy production
b ) nuclear reactions
c ) purification of water
d ) coocking of food
explanations :
answer : b ) nuclear reactions
Q NO 4 . In induction wattmeters ,the instantaneous value of deflecting torque is................... voltage under measurement .
a ) directly proportional
b ) inversely proportional
c ) directly proportional to square of
d ) inversely proportional to square of
explanations :
answer : c ) directly proportional to square of
Q NO 5 . which of the following is an integrating instrument ?
a ) watt-hour meter
b ) ammeter
c ) voltmeter
d ) wattmeter
explanations :
answer : a ) watt-hour meter
Q NO 6 . Semiconductor strain gauges depend upon ...... ..... for their action .
a ) piezo electric effect
b ) piezo resistive effect
c ) hall' s effect
d ) superconductivity
explanations :
answer : b ) piezo resistive effect
Q NO 7 . ............. has the maximum tenure .
a ) wooden poles
b ) steel poles
c ) concrete poles
d ) steel towers
explanations :
answer : d ) steel towers
Q NO 8 . the frequency of an I.M having synchronous speed 600 rpm is 40 Hz find the no of poles
a ) 6
b ) 12
c ) 8
d ) 4
explanations :
answer : c ) 8
Q NO 9 . .............. works on the chemical effect of current .
a ) power factor meter
b ) voltmeter
c ) dc ampere hour meter
d ) wattmeter
explanations :
answer : c ) dc ampere hour meter
Q no 10. In earthed neutral system ,the magnitude of transient voltage is ;
a ) zero
b ) very small
c ) medium
d ) very high
explanations :
answer ; b ) very small
Q NO 11 . Insulation resistance of a cable can be measured by which of the following ?
i ) meggar ii ) galvanometer method
a ) only ii
b ) both i and ii
c ) neither i nor ii
explanations :
answer ; none of the above option correct
correct answer ; only meggar
correct answer ; only meggar
Q NO 12 . with increase in temp. ,the resistance of semiconductors ;
a ) increase
b ) decrease
c ) do not change
d ) may increase or decrease
explanations :
answer ; b ) decrease
Q NO 13 . In argon arc welding , argon acts as a
a ) shield to protect work from getting oxidised
b ) filler material
c ) energy source
d ) flux
explanations :
answer ; a ) shield to protect work from getting oxidised
Q NO 14 voltage limit for ac single phase I.M is ;
a ) 3 KV
b ) 1.5 KV
c ) 250 V
d ) 11 KV
explanations :
answer ; c ) 250 V
Q NO 15 . pin type insulators are employed upto
a ) 11 KV
b ) 33 KV
c ) 66 KV
d ) 132 KV
explanations :
answer b ) 33 KV
Q NO 16 . If 2.2 m long conductor has a cross sectional area of 0.025 ㎡ and resistance4 of 5 ohms ,find its resistivity ;
a ) 0.072 Ω-m
b ) 0.057 Ω-m
c ) 0.58 Ω-m
d ) 0.67 Ω-m
explanations :
answer b ) 0.057 Ω-m
Q no 17 . For overhead transmission line ,the magnitude of surge impedance is close to
a ) 4 - 6 ohms
b ) 50- 100 ohms
c ) 400 - 600 ohms
d ) 700 - 1000 ohms
explanations :
answer c ) 400 - 600 ohms
Q no 18 . Which of the following is not a requirement for a dc ammeter 's shunt ?
a ) high thermal automotive force
b ) time invariant
c ) low temp co-efficient
d ) carry current without excessive temp rise
explanations :
answer a ) high thermal automotive force
Q no 19 . Which type of hydel power plants can be used as both base and peak load plants ?
a ) run of river plants with pondage
b ) storage type plants
c ) run of river plants without pondage
d ) pumped storage plants
explanations :
answer b ) storage type plants
Q no 20 . Which of the following is not a type of resistance welding ?
a ) carbon arc welding
b ) projection welding
c ) seam welding
d ) flush welding
explanations :
answer a ) carbon arc welding
Q no 21 . corona discharge is generally ............... in colour .
a ) blackish
b ) bluish
c ) yellowish
d ) brownish
explanations :
answer : b ) bluish
Q no 22 . surge diverters and surge absorbers are the type of ;
a ) relays
b ) C.B
c ) over voltage protection device
d ) reactors
explanations :
answer : c ) over voltage protection device
Q no 23 . which of the following part of a x-mer consists of a small vessel which contains a drying agent ?
a ) conservator
b ) breather
c ) oil tank
d ) windings
explanations :
answer : b ) breather
Q no 24 . 0110 in binary form can be written as ..................in decimal form .
a ) 4
b ) 5
c ) 6
d ) 7
explanations :
answer : c ) 6
Q no 25 . Which of the following device is mainly used in dc drivers.
a ) transistor
b ) diode
c ) thyristor
d ) triac
explanations :
answer : c ) thyristor
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