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WorksheetsElectrical Engineering Test
Total questions: 50
Worksheet time: 44mins
The emf of the dry cell is about
0 V
0.5 V
1 V
1.5 V
Secondary’s cells are
lead acid cell
alkaline cell
both (a) and (b)
none of these
When two batteries are connected in parallel, it should be ensured that
They have same emf
They have same make
They have same ampere hour capacity
They have identical internal resistance
The unit for inductance is ___________
Ohm
Henry
Farad
Ampere
The resistivity of the conductor depends on
area of the conductor.
length of the conductor.
type of material.
none of these.
Which of the following is not an expression power?
P=VI
P=I2R
P=V2/R
P=I/R
Conductance is expressed in terms of
ohm / m
m / ohm
mho / m
mho
The resistance of a 100 W, 200 V lamp is
100 ohm
200 ohm
400 ohm
1600 ohm
By using two wattmeter method, power can be measured in
3 - phase, 2 - wire system
3 - phase, 3 - wire system
3 - phase, 4 - wire system
All of these
Which among the following sentences is correct?
Lenz’s law is used to find the direction of induced current
Fleming’s right hand rule is used to find the direction of induced current
Fleming’s left hand rule is used to find the direction of force
All of these
According to Kirchoff’s voltage law,
The algebraic sum of all the e.m.f’s in the circuit is zero
Algebraic sum all the voltage drops in the circuit is zero
Algebraic sum of e.m.f’s plus algebraic sum of voltage drops is equal to zero
All of these
Alternating voltage can be generated by
By rotating a coil in a magnetic field
By rotating a magnetic field within a stationary coil
Either (a) or (b)
Neither (a) or (b)
Energymeter is a / an
Indicating instrument
Integrating instrument
Recording instrument
All of these
Reluctance in a magnetic material is a property by virtue of which it opposes the creation of
Electric flux
Magnetic flux
Electric field density
Electric lines of force
The S.I. unit of power is
Henry
Coulomb
Watt
Watt-hour
The property of the conductor due to which it passes current is called
Resistance
Reluctance
Conductance
Inductance
The insulation on a current carrying conductor is provided
To prevent leakage of current
To prevent a shock
Both of the above
None of the above
Active power and apparent power are respectively represented by?
kW and kVAR
kVAR and kVA
kVA and kVAR
kW and kVA
The difference between the speed of the stator and the actual speed is called
(a)
____ is used to provide electrical connectivity between the static and rotating parts of the DC motor
Commutator
Brush
Power factor of the following circuit will be unity
Capacitance
Resistance
Both a and b
Inductance
A d.c. generator whose field magnet winding is supplied from an independent external d.c. source:
Self Excited DC generator
Separately excited DC generator
For A DC series motor, the speed may become dangerously high if load reduces to a small value. So,
It must not be run on no load
It must not be run on less load at high currents
HOW MANY DIRECTIONS CAN ELECTRIC FIELD AT A POINT HAVE?
ZERO
ONE
TWO
MANY
SIZE OF EARTH WIRE IS BASED ON
MAX FAULT CURRENT CARRYING THROUGH GROUND WIRE
RATED CURRENT CARRYING CAPACITY OF THE SERVICE LINE
DEPENDS ON SOIL RESISTANCE
BOTH A & B
WHAT ARE THE COMBINATIONS OF RESISTANCES?
SERIES
PARALLEL
SERIES PARALLEL
ALL THE ABOVE
LAMINATIONS OF CORE ARE GENERALLY MADE UP OF
CASE IRON
CARBON
SILICON STEEL
STAINLESS STEEL
INPUT POWER = OUTPUT POWER IS CALLED AS_____TRANSFORMER
PRIMARY
SECONDARY
IDEAL
NONE
What is the Ripple factor of a fullwave rectifier ?
0.48
0.31
0.707
1.414
Arrange the bulbs in the order of increasing brightness.
If the peak voltage on a centre tapped full wave rectifier circuit is 5V and diode cut in voltage is 0.7. The peak inverse voltage on diode is_________
4.3V
9.3V
5.7V
10.7V
The process of converting the AC current into DC current is called...
Filtering
Rectification
Smoothing
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