Electrical Engineering practice bits -11

Electrical Engineering practice bits -11

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.     A transformer having a constant

a.     Voltage

b.    Current

c.     Power

d.    Power factor

2.     The rapid wears of brushes takes place due to

a.     Abrasion from dust

b.    Excessive spring pressure

c.     Rough commutator bars

d.    All of the above

3.     Step down transformer having

a.     N2>N1

b.    N2<N1

c.     N2=N1

d.    none

4.     Y- starting of motor is not possible in ase of

a.     1-phase motors

b.    Variable speed motors

c.     Low horse power motors

d.    High speed motors

5.     The term “cogging” is associated with

a.     3-phase  transformer

b.    Compound generators

c.     DC series motors

d.    Induction motors

6.     Synchronous motor runs at

a.     Synchronous speed

b.    < synchronous speed

c.     > synchronous speed

d.    None

7.     An over excited synchronous motor takes

a.     Leading current

b.    Lagging current

c.     Both a and b

d.    None

8.     Which is the absolute instrument

a.     Ammeter

b.    Watt meter

c.     Energy meter

d.    Tangent galvanometer

9.     For the induced draught the fan is located

a.     Near bottom of chimney

b.    Near bottom of furnace

c.     At the top of chimney

d.    Any where permissible

10.  Which of the following are theparameters of transmission lines lines

a.     Resistance

b.    Inductance

c.     Capacitance

d.    All of the above

11.  310 KM line is considered as

a.     Long line

b.    Medium line

c.     A short line

d.    Any of the above

12.  Which of the following material is used for overhead transmission lines

a.     ACSR

b.    AAC

c.     SOLID CONDUCTOR

d.    HOLLOW CONDUCTOR

13.  Which of the following is not a constituent for making porcelain insulator

a.     Quartz

b.    Kaolin

c.     Feldspar

d.    Silica

14.  Electric pressure is also called

a.     Resistance

b.    Power

c.     Voltage

d.    Energy

15.  The FERRITES are materials

a.     paramagnetic

b.    ferromagnetic

c.     diamagnetic

d.    none of the above

16.  Sound cannot travel through

a.     Solids

b.    Liquids

c.     Gases

d.    Vacuum

17.  A dc shunt motors are used for driving

a.     trains

b.    hoists

c.     cranes

d.    machine tools

18.  which of the magnetic materials are diamagnetic

a.     silver

b.    copper

c.     silver and copper

d.    iron

19.  short circuit test on transformer is conducted to determine

a.     iron losses

b.    copper losses

c.     hysteresis losses

d.    eddy current losses

20.  The earth potential is taken as __

a.     Infinite

b.    Supply voltage

c.     1 volt

d.    Zero

Answers :

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

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