Electrical Engineering practice bits -20

Electrical Engineering practice bits -20

The following practice bits are useful the Electrical Aspirants  who are preparing for the Different competitive exams like RRB JE ,SSC JE, ECET , GATE , PSU, PGECET,DRDO CEPTAM ,TSTRANSCO, TSGENCO, TSSSPDCL , TSNPDCL AE AND SE, APTRANSCO, APGENCO, ....ETC

MCQ Questions With Answers

1.     AT standstill condition the value of slip is

a.     0

b.    1

c.     infinity

d.    100

2.     The symbol used for inductance is

a.      

b.     

c.      

d.     

3.     The specific graviy of electrolyte is measured by

a.     Mano meter

b.    Mechanical gauge

c.     Hydro meter

d.    Psychrometer

4.     ____ of electrolyte indicates the state of charge of battery

a.     Color

b.    Mass

c.     Visiosity

d.    Specific gravity

5.     The charge required to calibrate one gram equivalent of any substance is known as____ constant

a.     time

b.    faradays

c.     boltsman

d.    date

6.     the open circuit voltage of any storage cell depnds wholly

a.     its chemical constituents

b.    on the strength of its electrolyte

c.     its temperature

d.    All above

7.     Unit of luminous efficiency is

a.     Lumen/watt

b.    Watt/lumen

c.     Lux

d.    lumens

8.     The resistance of an open circuit is equal to

a.     0

b.    Lesser than one ohm

c.     Infinite

d.    Less than before

9.     Power factor of an AC circuit is equal to

a.     Cosine of angle between voltage and current

b.    Tangent of angle between voltage and current

c.     Impedance

d.    Apparent power

10.  An ideal operational amplifier has

a.     Infinite o/p impedance

b.    Zero i/p impedance

c.     Infinite gain

d.    All of the above

11.  An oscillator converts___

a.     AC power into DC power

b.    DC power into AC power

c.     Mechanical power into ac power

d.    None of the above

12.  Which one of the following material is used for to doping to prepare N-type semiconductor

a.     Indium

b.    Gallium

c.     Arsenic

d.    Silver

13.  Which one of the following material is used for doping to prepare p-type semiconductor

a.     Arsenic

b.    Antimony

c.     Indium

d.    Phosphorus

14.  Lamination of core are made of

a.     Cast  iron

b.    Carbon

c.     Silicon steel

d.    Stainless steel

15.  The armature of DC generator is laminated to    

a.     Reduce the bulk

b.    Provide the bulk

c.     Insulate the core

d.    Reduce eddy  current loss

16.  Permeance is the reciprocal of

a.     Flux density

b.    Reluctance

c.     Ampere turns

d.    Resistance

17.  Which of the following doesn’t change in a transformer

a.     Current

b.    Voltage

c.     Frequency

d.    All of the above

18.  The emf generated in a dc generator is directly proportional to

a.     Flux/pole

b.    Speed of armature

c.     No. of poles

d.    All of the above

19.  A transformer core is laminated to

a.     Reduce hysteresis loss

b.    Reduce eddy current losses

c.     Reduce copper loss

d.    Reduce all above loss

20.  In a transformer the energy is conveyed from primary to secondary

a.     Through cooling coil

b.    Through air

c.     By the flux

d.    None

ANSWERS

1.B	2.C	3.C	4.D	5.B	6.D	7.A	8.C	9.A	10.C
11.B	12.C	13.C	14.C	15.D	16.B	17.C	18.D	19.B	20.C

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