Electrical Engineering Practice Bits -2

Electrical Engineering Practice Bits

1.     Pin type insulators are used in

a.     Underground cables

b.    Sub marine cables

c.     Over head lines

d.    House wiring

2.     The measuring instrument which works on heating effect is

a.     Frequency meter

b.    Wein’s bridge

c.     Megger

d.    Hot wire instrument

3.     Megger is used for measuring

a.     Resistance

b.    Insulation resistance

c.     High resistance

d.    Earth resistance

4.     In electrical measuring instruments electrical energy is converted into

a.     Light energy

b.    Heat energy

c.     Mechanical energy

d.    None

5.     Electrical degrees to make one cycle is

a.     180⁰

b.    270⁰

c.     90⁰

d.    360⁰

6.     Heat produced in a current carrying conductor is proportional to

a.     I

b.    I²

c.     I²Rt

d.    I²R

7.     Law of conservation of charge is extended in

a.     KCL

b.    KVL

c.     Len’z law

d.    Faraday’s law

8.     The curve representing ohm’s law is

a.     Sine

b.    Cosine

c.     Parabola

d.    Linear

9.     In electrical machines one pole pitch is

a.     180⁰ electrical degrees

b.    360⁰ electrical degrees

c.     90⁰ electrical degrees

d.    120⁰ electrical degrees

10.  The permissible voltage fluctuation limit in supply

a.     10%

b.    5%

c.     1%

d.    20%

11.  Purpose of tap changer in transformer

a.     Regulate the voltage at input

b.    Regulate voltage at output

c.     Regulate the power

d.    None

12.  Switching transistor are operated in

a.     Cut off region

b.    Active region

c.     Saturation region

d.    Either cutoff or saturation

13.  Which of the following plants is suitable for peak load

a.     Diesel engine plant

b.    Steam power plant

c.     Nuclear power plant

d.    Hydro electric plant

14.  Solar cell are made of

a.     Aluminium

b.    Germanium

c.     Silicon

d.    Cadmium

15.  The resistance in electric circuit is analogous to __ in magnetic circuit

a.     Flux

b.    MMF

c.     Permeance

d.    Reluctance

16.  Real part of admittance is

a.     Impedance

b.    Resistance

c.     Susceptance

d.    Conductance

17.  Lap winding is most suitable for

a.     Low voltage

b.    High voltage

c.     Both

d.    None

18.  The voltage gain of an emitter follower is always

a.     zero

b.    More than 1

c.     Less than 1

d.    Greater than or equal to 1

19.  The practical value of co efficient of coupling is always

a.     Equal to 1

b.    Greater than 1

c.     Less than 1

d.    None

20.  An instantaneous change in voltage is not possible in

a.     Resistor

b.    An inductor

c.     A capacitor

d.    A current source