WorksheetsBasic Electrical Engineering _B div 2022
Total questions: 20
Worksheet time: 3hrs 20mins
if 110V is applied across a 220V, 100W bulb the power consumed by it will be
100W
50W
25W
12.5W
Voltage drop across 14.5 Ω resistor in figure
29 V
30.5 V
14 V
18 V
The phase angle difference between current and voltage is 90o, the power will be ________
minimum
maximum
zero
VI
The form factor is the ratio of
peak value to r.m.s. value
r.m.s. value to average value
average value to r.m.s. value
none of the above
The power factor of a purely resistive circuit is
zero
unity
lagging
leading
how many electrical degrees are phases displaced
30
60
90
120
This picture is an example of a ________________.
Motor
Generator
Step-up transformer
Step-down transformer
The efficiency of a transformer will be maximum when ?
copper losses = hysteresis losses
hysteresis losses = eddy current losses
eddy current losses = copper losses
copper losses = iron losses
It is used to change the AC voltage induced in the armature windings to DC voltage at the generator output terminals.
armature
rotor
poles
commutator
Name the device
DC motor
DC generator
AC generator
None of the above
What happens when Induction motor runs at synchronous speed, motor will
Burn
Stop
Delivers Real Power
Delivers reactive power
If an electrical appliance uses current of 11 A, which is the suitable value of fuse to be used.
15 A
5 A
10 A
13 A
What are the steps in the electrical power system?
Generation, transmission and distribution.
generation, transmission and transformer
generation, impedance and distribution.
Motor, transmission and distribution.
The earth electrode is made up of
steel
galvanized iron
bronze
lead
If any two phases for an induction motor are interchanged
The motor will run in the reverse direction
The motor will continue to run in the same direction
The motor will stop
The motor will Burn
