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Elements of Electrical Engineering
(2110005)
Summer 2015 Sem-2
MCQ(s) of
Elements of Electrical Engineering
(2110005)
- Summer 2015 Sem-2
Q.
1
The material used for fuse should have
(A) low melting point & high conductivity
(B) low melting point & low conductivity
(C) high melting point & high conductivity
(D) high melting point & low conductivity
Answer
(B)
low melting point & low conductivity
Q.
2
Earthing is necessary to
(A) avoid risk of fire due to earth leakage
(B) avoid electric shock to human body
(C) both [a] & [b]
(D) either [a] or [b]
Answer
(C)
both [a] & [b]
Q.
3
MCB provides protection against
(A) short ckt
(B) overload
(C) earth fault
(D) all of the above
Answer
(B)
overload
Q.
4
The choke in tube light wiring provides
(A) high current
(B) high resistance
(C) high impulse voltage
(D) low reactance
Answer
(C)
high impulse voltage
Q.
5
Which type of capacitor is used generally in fan?
(A) ceramic
(B) Electrolytic
(C) mica
(D) none of above
Answer
(D)
none of above
Q.
6
The meter used at our premises measure
(A) voltage
(B) current
(C) power
(D) energy
Answer
(D)
energy
Q.
7
The frequency of DC supply is
(A) 50 Hz
(B) 1 Hz
(C) 0 Hz
(D) none of above
Answer
(C)
0 Hz
Q.
8
Measuring range of ammeter can be extended by using
(A) high value of series resistance
(B) low value of shunt resistance
(C) low value of series resistance
(D) high value of shunt resistance
Answer
(C)
low value of series resistance
Q.
9
Full name of MCB is
(A) Miniature circuit breaker
(B) Minimum circuit breaker
(C) Maximum circuit breaker
(D) None of the above
Answer
(A)
Miniature circuit breaker
Q.
10
Voltmeter always connected is _________ in a circuit.
(A) Parallel
(B) series
(C) Both (a) & (b)
(D) None of the above
Answer
(A)
Parallel
Q.
11
Unit of magneto motive force (mmf) is
(A) Weber
(B) AT
(C) Voltage
(D) Tesla
Answer
(B)
AT
Q.
12
Average value of a.c. voltage = _________× Vm
(A) 1.414
(B) 0.707
(C) 0.637
(D) 1.5
Answer
(C)
0.637
Q.
13
Unit of potential difference is
(A) voltamp
(B) watt
(C) ampere
(D) voltage
Answer
(D)
voltage
Q.
14
Value of form factor(Kf) is
(A) 0.707
(B) 1.414
(C) 0.637
(D) 1.11
Answer
(D)
1.11
Q.
15
The unit of conductivity is
(A) Siemens / m
(B) Siemens-m
(C) mho
(D) mho-m
Answer
(A)
Siemens / m
Q.
16
If relative permittivity is 5 , then it’s absolute permittivity is
(A) 5 / €
0
(B) 5 €
0
(C) €
0
/ 5
(D) 8.854 x 10
-12
Answer
(B)
5 €
0
Q.
17
The unit of permeance is
(A) AT / Wb
(B) Wb / AT
(C) Henry
(D) either [b] or [c]
Answer
(B)
Wb / AT
Q.
18
Q-factor of a coil means
(A) Higher voltage magnification
(B) Higher selectivity of the tuning coil
(C) either [a] or [b]
(D) both [a] and [b]
Answer
(A)
Higher voltage magnification
Q.
19
For a series resonance condition of a AC circuit current is
(A) minimum
(B) maximum
(C) zero
(D) infinity
Answer
(B)
maximum
Q.
20
For zero power factor load of 3-phase ckt.,if we measure the power by 2-wattmeter method then readings of wattmeters are
(A) one wattmeter shows zero reading
(B) equal & +ve sign
(C) equal & opposite sign
(D) both shows zero reading
Answer
(C)
equal & opposite sign
Q.
21
The gas used in sodium vapour lamp is
(A) argon
(B) nitrogen
(C) neon
(D) methane
Answer
(C)
neon