Electrical Engineering practice bits -13

Electrical Engineering practice bits -13

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.     Which of the following motors used in mixies

a.     Repulsion motor

b.    Reluctance motor

c.     Hysteresis motor

d.    Universal motor

2.     Which of the following motors is inherently self starting

a.     Split motor

b.    Shaded pole motor

c.     Reluctance motor

d.    None

3.     Watt hour meter is classified as a

a.     Deflecting instrument

b.    Indicating instrument

c.     Recording instrument

d.    Integrating instrument

4.     There is a greater possibility of occurrence of corona during

a.     Dry weather

b.    Winter

c.     Summer heat

d.    Humid weather

5.     Which of the following relays used on long transmission line

a.     Impedance relay

b.    Mho’s relay

c.     Reactance relay

d.    None

6.     The property of a conductor due to which it passes current is called

a.     Resistance

b.    Reluctance

c.     Conductance

d.    Inductance

7.     Conductance is reciprocal of

a.     Resistance

b.    Inductance

c.     Reluctance

d.    Capacitance

8.     The resistance of a conductor varies inversely as

a.     Length

b.    Area of cross

c.     Temperature

d.    Resistivity

9.     With rise in temperature  the resistance of pure metals

a.     Increases

b.    Decrease

c.     First increase and them decrease

d.    Remains constant

10.  With rise in temperature the resistance of semiconductors

a.     Decreases

b.    Increase

c.     Increase and decrease

d.    Constant

11.  If the frequency of transformer is increases iron losses

a.     incresses

b.    decresses

c.     both

d.    none

12.  Which color wire is recommended for earth connection as per ISI code

a.     Red

b.    Green

c.     Black

d.    Blue

13.  The potential of earth is

a.     Low

b.    Zero

c.     Medium

d.    High

14.  The capacity of a battery is expressed in terms of

a.     Current rating

b.    Voltage rating

c.     Ampere-hour rating

d.    None

15.  Weston standard cell at 20⁰C has voltage of ___ volts

a.     0.8

b.    0.9

c.     1.0187

d.    1.5

16.  Extent of corrosion in the underground material work depends upon

a.     Amount of moisture

b.    Type of metals

c.     Type of soil chemic

d.    All of the above

17.  A substance that has 10 W retentiveness can be used for manufacturing of

a.     Electromagnets

b.    Permanent magnets

c.     Bar magnets

d.    Paramagnets

18.  The unit of reluctance is

a.     Ampere / cm²

b.    Weber/m²

c.     Ampere turns/weber

d.    Ampere/weber

19.  Brushes of DC machines are made of

a.     Carbon

b.    Soft copper

c.     Hard copper

d.    All of the above

20.  The main reason of teeth setting of a hack saw blade is

a.     To reduce friction during a cutting metal

b.    Nothing

c.     To give a beautiful shape to it

d.    To help in cutting the jobs having more width and depth

Answers :

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

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