MCQ’s on Basic Electrical
Which lamp has the best Colour Rendering Index (CRI)?
(a) LED
(b) Fluorescent
(c) Incandescent
(d) High pressure sodium vapour
The correct answer is (c) Incandescent
Current transformers usually have a secondary winding rating of
(a) 5 A
(b) 20 A
(c) 50 A
(d) 100 A
The correct answer is (a) 5 A
The reactance of the transformer depends on
(a) Size of the core
(b) Size of the tank
(c) Leakage Flux
(d) All of the above
The correct answer is (c) Leakage Flux
Under No-Load condition, the transmission line carries current because of
(a) Heating Effect
(b) Transmission Effect
(c) Chemical Effect
(d) Capacitance Effect
The correct answer is (d) Capacitance Effect
If the supply frequency to the transformer is increased the iron loss will
(a) Decrease
(b) Increase
(c) No Change
(d) Any of the above
The correct answer is (b) Increase
Which of the following does not change in the transformer?
(a) Frequency
(b) Current
(c) Voltage
(d) All of the above
The correct answer is (a) Frequency
(a) 50
(b) 100
(c) 150
(d) 200
The correct answer is (d) 200
(a) Algebric sum of currents in closed-loop
(b) Algebric sum of voltages in closed-loop
(c) Algebric sum of powers in closed-loop
(d) Algebric sum of losses in closed-loop
The correct answer is (b) Algebric sum of voltages in closed-loop
(b) Short Circuit
(c) Rectifier
(d) Amplifier
The correct answer is (b) Short Circuit
(b) Two dielectrics
(c) Two insulators
(d) Two conductors
The correct answer is (d) Two Conductors
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