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BASIC ELECTRICAL QUIZ

Total questions: 70

Worksheet time: 49mins

Name
Class
Date
1.

The unit for inductance is ___________

a)

Ohm

b)

Henry

c)

Farad

d)

Ampere

2.

The resistivity of the conductor depends on

a)

area of the conductor.

b)

length of the conductor.

c)

type of material.

d)

none of these.

3.

Which of the following is not an expression power?

a)

P=VI

b)

P=I2R

c)

P=V2/R

d)

P=I/R

4.

Conductance is expressed in terms of

a)

ohm / m

b)

m / ohm

c)

mho / m

d)

mho

5.

The resistance of a 100 W, 200 V lamp is

a)

100 ohm

b)

200 ohm

c)

400 ohm

d)

1600 ohm

6.

By using two wattmeter method, power can be measured in

a)

3 - phase, 2 - wire system

b)

3 - phase, 3 - wire system

c)

3 - phase, 4 - wire system

d)

All of these

7.

According to Kirchoff’s voltage law,

a)

The algebraic sum of all the e.m.f’s in the circuit is zero

b)

Algebraic sum all the voltage drops in the circuit is zero

c)

Algebraic sum of e.m.f’s plus algebraic sum of voltage drops is equal to zero

d)

All of these

8.

Alternating voltage can be generated by

a)

By rotating a coil in a magnetic field

b)

By rotating a magnetic field within a stationary coil

c)

Either (a) or (b)

d)

Neither (a) or (b)

9.

Energymeter is a / an

a)

Indicating instrument

b)

Integrating instrument

c)

Recording instrument

d)

All of these

10.

Reluctance in a magnetic material is a property by virtue of which it opposes the creation of

a)

Electric flux

b)

Magnetic flux

c)

Electric field density

d)

Electric lines of force

11.

The property of the conductor due to which it passes current is called

a)

Resistance

b)

Reluctance

c)

Conductance

d)

Inductance

12.

The insulation on a current carrying conductor is provided

a)

To prevent leakage of current

b)

To prevent a shock

c)

Both of the above

d)

None of the above

13.

Active power and apparent power are respectively represented by?

a)

kW and kVAR

b)

kVAR and kVA

c)

kVA and kVAR

d)

kW and kVA

14.
It is not any safer to use a grounded plug than an ungrounded one.  
a)
True
b)
False
15.
It is always advisable to ask questions about the things you do not fully understand before doing electrical wiring work.  
a)
True
b)
False
16.
It is alright to touch bare wires without testing it first with a voltage tester.  
a)
True
b)
False
17.
Never work on an electrical circuit until you have turned off the circuit breaker.  
a)
True
b)
False
18.

Electricity is the movement of ________.

a)

Atom

b)

Electrons

c)

Neutrons

d)

Nucleus

19.

Which among the following is an example of a conductor?

a)

rubber

b)

silver

c)

plastic

d)

asbestos

20.

_________________are small drawings or pictograms used to represent various electrical devices in a diagram or plan of electrical circuit

a)

ELECTRICAL WIRING

b)

ELECTRICAL SYMBOLS

c)

ELECTRICAL SIGNS

d)

SCHEMATIC DIAGRAM

21.

_________________a warning icon in a picture symbol intended to alert you and to instruct you on how to avoid a potentially hazardous condition

a)

ELECTRICAL WIRING

b)

ELECTRICAL SYMBOLS

c)

ELECTRICAL SIGNS

d)

SCHEMATIC DIAGRAM

22.

Which among the following is NOT an example of an OUTLET ELECTRICAL SYMBOL?

a)
b)
c)
d)
23.

Which is the symbol for SWITCH?

a)
b)
c)
d)
24.

The sum of all the voltages over any closed loop is equal to

a)

1V

b)

0V

c)

infinity

d)

Supply voltage

25.

What is the basic law used to analyze any circuit

a)

Kirchhoff's laws

b)

Amperes's law

c)

Faraday's law

d)

Newton's law

26.

In superposition theorem, when we consider the effect of one voltage source, all the other voltage sources are:

a)

Undisturbed

b)

Shorted

c)

Opened

d)

Altered

27.

In Norton's theorem, short circuit current Isc is found across the ______ terminals of the network.

a)

Input

b)

Output

c)

Neither input nor output

d)

Both input and output

28.

Maximum power drawn from the source depends on the:

a)

value of the source resistance

b)

Value of the load resistance

c)

Neither the source nor the load resistance

d)

Both source and load resistance

29.

Maximum power is transferred from the source to the load end when the _____ of the circuit matches with the load impedance

a)

Impedance

b)

capacitance

c)

admittance

d)

power

30.

Short circuit test in transformers are used to identify

a)

Copper losses

b)

Winding losses

c)

Current losses

d)

Voltage losses

31.

Iron loss, core loss or no load loss in transformers by conducting:

a)

Short circuit test

b)

Open circuit test

c)

Both short and open circuit tests

d)

None of the above

32.

Which is the parameter that CANNOT be measured using a multimeter

a)

Temperature

b)

Frequency

c)

Resistance

d)

Pressure

33.

To which winding of the transformer is the supply voltage applied to:

a)

Primary winding

b)

Secondary winding

c)

Both primary and secondary windings

d)

Neither primary nor secondary winding

34.

It is a path or line through which an electrical current flows.

a)

electrical circuit

b)

open circuit

c)

short circuit

d)

close circuit

35.

A sketch showing the components of the circuit

using standard electrical symbols. It shows the actual

number of components and how the wiring is routed but

not the actual location.

a)

Schematic Diagram

b)

Pictorial Diagram

36.

Sketch of electrical circuit that shows the

external appearance of each component. It is much like a

photograph of the circuit and uses simple images of parts.

a)

schematic diagram

b)

pictorial diagram

37.

if 110V is applied across a 220V, 100W bulb the power consumed by it will be

a)

100W

b)

50W

c)

25W

d)

12.5W

38.

minimum number of resistor required to form series parallel combination is

a)

2

b)

3

c)

4

d)

1

39.

The no-load current drawn by transformer is usually what per cent of the full-load current ?

a)

0.2 to 0.5 per cent

b)

2 to 5 per cent

c)

12 to 15 per cent

d)

20 to 30 per cent

40.

The efficiency of a transformer will be maximum when ?

a)

copper losses = hysteresis losses

b)

hysteresis losses = eddy current losses

c)

eddy current losses = copper losses

d)

copper losses = iron losses

41.

In a given transformer for given applied voltage, losses which remain constant irrespective of load changes are :-

a)

friction and windage losses

b)

copper losses

c)

hysteresis and eddy current losses

d)

none of the above

42.

In the transformer the function of a conservator is to :-

a)

provide fresh air for cooling the transformer

b)

supply cooling oil to transformer in time of need

c)

protect the transformer from damage when oil expends due to heating

d)

none of the above

43.
This is an example of a ______ circuit
a)
Series
b)
Parallel
c)
Open
d)
Dihexihedral
44.
The total resistance in this circuit is 
a)
100 ohms
b)
450 ohms
c)
400 ohms
d)
30 ohms
45.
The voltage dropped across the 300 ohm resistor is 
a)
6 V
b)
9 V
c)
2 V
d)
30 V
46.

The emf of the dry cell is about

a)

0 V

b)

0.5 V

c)

1 V

d)

1.5 V

47.

Secondary’s cells are

a)

lead acid cell

b)

alkaline cell

c)

both (a) and (b)

d)

none of these

48.

When two batteries are connected in parallel, it should be ensured that

a)

They have same emf

b)

They have same make

c)

They have same ampere hour capacity

d)

They have identical internal resistance

49.
This circuit has more than one loop. When one light goes out, the others stay on. 
a)
closed circuit
b)
series circuit
c)
parallel circuit
d)
open circuit
50.
this is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
51.

Commutator in DC Motor is used for

a)

collecting of current

b)

reduce losses

c)

increase efficiency

d)

convert AC armature current in to DC

52.

Which of the following rule is used to determine the direction of rotation of D.C motor?

a)

Coloumb’s Law

b)

Lenz’s Law

c)

Fleming’s Right-hand Rule

d)

Fleming’s Left-hand Rule

53.

For 50 Hz and 2 pole, the maximum speed of an alternator is ---------------

(a)  

54.

The induced EMF in the armature conductors of a DC motor is

a)

Triangular

b)

Alternating

c)

Rectangular

d)

Trapezoidal

55.

A circuit breaker is

a)

power factor correcting device

b)

a device to neutralize the effect of transients

c)

a current interrupting device

d)

a waveform correcting device

56.

The most simplest type of resistor is ...

a)

Wire wound resistor

b)

Metal film resistor

c)

Surface mount resistor

d)

Network resistor

57.

Kirchoff's Current Law is ...

a)

Current does not exist.

b)

The algebraic sum of the currents meeting at a junction in an electrical circuit is zero.

c)

There is no such law.

d)

V = IR

58.

The internal impedance of an ideal current source is ...

a)

zero

b)

one

c)

infinite

d)

depends upon many factors

59.

The internal impedance of an ideal voltage source is ...

a)

zero

b)

one

c)

infinte

d)

depends upon many factors

60.

"Earthing" word was introduced by ...

a)

Indian culture

b)

British culture

c)

US culture

d)

French culture

61.

"Grounding" word was introduced by ...

a)

British culture

b)

US culture

c)

French vulture (not a typo)

d)

Italian culture

62.

A place where three or more branches meet in an electrical circuit is called as ...

a)

Nodal analysis

b)

Conjuction

c)

Joint

d)

Node

63.

In Thevenin's theorem, the voltage source (VTh) is connected in ... with RTh.

a)

Series

b)

Parallel

c)

Star Delta Configuration

d)

cars

64.

Maximum power is transferred in dc circuits when ... .

( RTh is thevenin's resistance OR internal resistance of source

RL is Load resistance)

a)

RTh >>> RL

b)

RTh <<< RL

c)

RTh = RL

d)

RTh = 0 and RL is infinite

65.

Efficiency is ...

(OP = Output power

IP = Input power)

a)

OP - IP

b)

IP - OP

c)

OP / IP

d)

IP / OP

66.

The circuit efficiency at maximum power transfer is ... %.

a)

0

b)

25

c)

50

d)

100

67.

When source and load have same resistance, they are said to be ...

a)

in resonance

b)

matched

c)

organised

d)

couple

68.

one coulomb of charge is equal to the charge on

a)

625×1016 electrons625\times10^{16}\ electrons

b)

6.25×1016 electrons6.25\times10^{16}\ electrons

c)

62.5×1016 electrons62.5\times10^{16}\ electrons

d)

0.625×1016 electrons0.625\times10^{16}\ electrons

69.
What is Electricity?
a)
Type of energy that can build up in one place
b)
Type of energy that can flow from one place to another.
c)
Type of energy that can build up in one place OR Type of energy that can flow from one place to another.
d)
None of the Possible Answers Shown
70.

KVL deals with the conservation of

a)

Mass

b)

Momentum

c)

Charge

d)

Energy

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