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WorksheetsElectrical Engg 1
Total questions: 64
Worksheet time: 21mins
Name
Class
Date
1.
Unit of charge is ------------.
a)
Coulombs
b)
Voltage
c)
watt
d)
amps
2.
Current is the flow of-------------.
a)
proton
b)
electron
c)
neutron
d)
atom
3.
Potential Difference is also called -----------.
a)
current
b)
voltage
c)
power
d)
energy
4.
----------------is the amount of energy supply to one coulomb of charge
a)
mmf
b)
emf
c)
power grnerator
d)
wattage
5.
------------------ is the capacity to do work.
a)
wattage
b)
power
c)
energy
d)
current
6.
----------------- is the rate of doing work.
a)
power
b)
energy
c)
current
d)
voltage
7.
A current source is the duel of a------------- source.
a)
voltage
b)
power
c)
energy
d)
current
8.
Ideal voltage source is called an
a)
dependent voltage source.
b)
independent voltage source.
c)
Dependent current source.
d)
Independent current source.
9.
Electrical Device works in------------ voltage
a)
low
b)
high
c)
medium
d)
both a & b
10.
Example of DC source.
a)
generator
b)
transfomer
c)
battery
d)
inverter
11.
The basic formula for capacity is--------------------.
a)
charge* Time
b)
Current Drain * Time
c)
current*voltage
d)
Current Drain * frequency
12.
1Ah = 1A current flowing for 1 hour.
a)
1 minute
b)
1 sec
c)
1 hour
d)
none
13.
The charging/discharging rates affect the rated battery -----------------.
a)
charge
b)
capacity
c)
power
d)
dicharging rate
14.
The age of the battery affects the -----------------------of a battery.
a)
charge
b)
capacity
c)
power
d)
dicharging rate
15.
The power sources are to be parallel connected must be of --------------------Voltage rating.
a)
same
b)
Higher
c)
lower
d)
double
16.
Using old and new batteries together is----------
a)
not good
b)
good
c)
not effects to battery
d)
will not work
17.
The terminals of two or more circuit elements meet is called -------------
a)
branch
b)
node
c)
loop
d)
tree
18.
A ------------- is any closed path in a circuit.
a)
branch
b)
node
c)
loop
d)
tree
19.
Ohms law
a)
V=IR
b)
I=VR
c)
P=VI
d)
R=VI
20.
Electrical Cell is converts the ------------------ energy into electrical energy.
a)
light
b)
chemical
c)
physical
d)
power
21.
In KVL the algebraic sum of all voltages within the loop must be equal to ----------------
a)
V=IR
b)
twice
c)
unity
d)
zero.
22.
AC changing the direction with respect to change in --------------
a)
current
b)
time
c)
voltage
d)
Refrequency
23.
motors convert-------------------- energy into mechanical energy.
a)
displacement
b)
pressure
c)
electrical
d)
light
24.
A sine wave is a ---------------.
a)
continuous wave.
b)
discrete
c)
complex
d)
clipping wave
25.
-------------------wave the same duration at minimum and maximum.
a)
sine
b)
square
c)
pulse
d)
triangular
26.
------------------------- wave form using in digital switching circuits
a)
sine
b)
square
c)
pulse
d)
triangular
27.
The value of an alternating quantity at a particular instant of time in a cycle is called -----------
a)
instantaneous value
b)
discrete vale
c)
peak topeak
d)
rms
28.
The frequency of direct current is___________.
a)
0Hz
b)
50Hz
c)
60Hz
d)
100Hz
29.
In india the frequency of alternating current is
a)
0Hz
b)
50Hz
c)
60Hz
d)
100Hz
30.
Power Factor of DC
a)
1
b)
Between 0 & 1
c)
more than 1
d)
less than 0
31.
Power Factor of AC
a)
1
b)
Between 0 & 1
c)
more than 1
d)
less than 0
32.
One complete wave form is called --------------------
a)
1kHz frequency
b)
time period
c)
cycle.
d)
duration of wave
33.
The time taken by the waveform to complete one full cycle is called the ----------------- of the waveform
a)
1kHz frequency
b)
time period
c)
cycle.
d)
duration of wave
34.
The number of complete cycle’s waves that are produced within one second is ----------------------
a)
frequency
b)
time period
c)
cycle.
d)
duration of wave
35.
Amplitude is defined as the __________________ value.
a)
+ve peak
b)
- ve peak
c)
peak to peak
d)
time petriod
36.
Form factor of pure sine wave is --------.
a)
1 minus
b)
1.1
c)
1.5
d)
2
37.
The power which is actually consumed or utilized in an AC Circuit is called -------------------
a)
True power
b)
Reactive Power
c)
Apparent Power
d)
power
38.
The product of applied voltage and active component of the current.
a)
True power
b)
Reactive Power
c)
Apparent Power
d)
power
39.
The applied voltage and the reactive component of the current.
a)
True power
b)
Reactive Power
c)
Apparent Power
d)
power
40.
The product of R.M.S value of voltage (V) and current (I).
a)
True power
b)
Reactive Power
c)
Apparent Power
d)
power
41.
The resistive load obstructs the flow of electrical energy in the circuit and converts it into ------------ energy.
a)
light
b)
thermal
c)
inductive
d)
chemical
42.
The lamp and the heater are the examples of the -------------------load.
a)
resistive
b)
inductive
c)
cacacitive
d)
none of these
43.
The power factor of the resistive load is -------------
a)
0
b)
1
c)
5
d)
10
44.
Generators are the examples of the --------------- load.
a)
resistive
b)
inductive
c)
cacacitive
d)
none of these
45.
The power factor of the inductive load is ___________
a)
lagging
b)
leading
c)
unity
d)
no change
46.
The power factor of the capacitive load is _____________.
a)
lagging
b)
leading
c)
unity
d)
no change
47.
The three phase system consist _______wires
a)
2
b)
3
c)
4
d)
5
48.
The ------------------connection is used for long distance transmission
a)
star
b)
delta
c)
DC
d)
single phase
49.
The phase difference of three phase system is -----------.
a)
0
b)
90
c)
120
d)
180
50.
The three phase system carries -----------.
a)
230V
b)
415 V
c)
110V
d)
1000V
51.
The voltages in three phases reach their maximum positive values is called
a)
Phase Difference
b)
Phase Sequence.
c)
Phase shift
d)
Phase Angle
52.
The short circuit causes the ---------------------
a)
heavy current
b)
heavy voltage
c)
low current
d)
lowvoltage
53.
-------------------is more than the desires load imposed on the power system network.
a)
lowerload
b)
overload
c)
excess current
d)
short circuit
54.
The fuse wires are bare wires and are made of ------------
a)
lead and tin.
b)
leading
c)
iron
d)
Copper – tin
55.
Fuse is connects -------------------with live wire
a)
series
b)
parallel
c)
a or b
d)
none
56.
Bimetallic strip is present in ------------
a)
fuse
b)
circuit breaker
c)
realay
d)
energy meter
57.
MCCB is a ----------------------sensitive device
a)
temperature
b)
humidity
c)
pressure
d)
pH
58.
-------------------------IS USED FOR EARTHING.
a)
GALVANISED PIPE
b)
URON PIPE
c)
COPPER PIPE
d)
ALUMINIUM PIPE
59.
Color of earthing-------
a)
green
b)
red
c)
black
d)
yellow
60.
Color of grounding-------
a)
green
b)
red
c)
black
d)
yellow
61.
The alternator is used in power plants which converts
a)
Electrical Energy into Mechanical Energy
b)
Electrical energy into Solar Energy
c)
Mechanical Energy into Electrical Energy
d)
Mechanical Energy into Nuclear Energy
62.
The efficiency of a thermal power plant improves with
a)
increased quantity of coal burnt
b)
larger quantity of water used
c)
lower load in the plant
d)
use of high steam pressures
63.
Coal used in power plant is also known as
a)
steam coal
b)
charcoal
c)
coke
d)
soft coal.
64.
Minimum quantity of fuel is required........
a)
Thermal power plant
b)
Nuclear power plant
c)
Hydro electric power plant
d)
Diesel power plant
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