BASIC ELECTRICAL PART 10 ONLINE MCQ EE

BASIC ELECTRICAL PART 10

BASIC ELECTRICAL PART 10

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Attempt Free BASIC ELECTRICAL PART 10 Here. Read The Important Electrical MCQ From Below.

[1] In ac circuit, the ratio of kW/kVA is
A. Power factor
B. Form factor
C. Load factor
D. Diversity factor

Answer

[2] Suppose that two ac waves have the same frequency but differ in phase by exactly 1/20 of a cycle. What is the phase difference between these two waves?

A.  18°
B.  20°
C.  36°
D.  5.73°

Answer

BASIC ELECTRICAL PART 10

[3] The unit of inductance is

A. Mho
B. Hendry
C. Ohm
D. Farad

Answer

[4] What is the angular frequency of the ac signal having a frequency of 1770Hz

A.  1770 rad/s
B.  11,120 rad/s
C.  282 rad/s
D.  Data insufficient

Answer

BASIC ELECTRICAL PART 10

[5] Thevenin’s equivalent circuit consists of

A. Series combination of Rth, Eth, Rl
B. Series combination of Rth, Eth
C. Parallel combination of Rth, Eth, Rl
D. Parallel combination of Rth, Eth

Answer

[6] The frequency of DC supply is
A. 16 2/3 Hz
B. 60 Hz
C. 50 Hz
D. 0 Hz

Answer

[7] Load factor is defined as the ratio of
A. Max demand/ Average demand
B. Average demand/ Connected load
C. Average demand/ Max. demand
D. Connected load/ Max demand

Answer

BASIC ELECTRICAL PART 10

[8] Q factor of an inductive coil is given by

A.  2π fL/R
B.  2π fr/R
C.  R/Z
D. lr/l

Answer

[9] The rms value of sinusoidal 100V peak to peak is
A. 100 V
B. 50/√2 V
C. 50 V
D. 100/√2 V

Answer

BASIC ELECTRICAL PART 10

[10] Which of the following bulbs will have the least resistance?
A. 220V, 60W
B. 220V, 100W
C. 115V, 60W
D. 115V, 100W

Answer

Solution Hint:
[2] One cycle = 360°.
1/20 of cycle is 360/20 = 18°

[4] Angular frequency ω = 2πf (rad/s)

BASIC ELECTRICAL PART 10

[7] Some of the important terms in power system:
Demand factor = maximum demand / Connected load Diversity factor = Sum of individual max. demands / Max. demand on power station The ratio of average load to the maximum demand during a given period is known as load factor. Load Factor = Average Load / maximum demand

[8] Quality factor is the ratio of reactive power to average power (Q/P)
Qs = [I2XL]/[I2R]
Qs = XL/R
Qs = ωL/R
Qs =2π fL/R

[9] Vrms = Vm/√2

BASIC ELECTRICAL PART 10