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Browse complete papersWhat is the RMS value of a sinusoidal current with a peak value of 10 A?
10 A
5 A
Correct answer
10 A
The RMS value of a triangular wave is what fraction of its peak value?
1
\(\frac{1}{\sqrt{2}}\)
\(\frac{1}{2}\)
\(\frac{1}{\sqrt{3}}\)
Correct answer
1
Which of the following is a major factor contributing to the ’Depreciation Factor’ (or Maintenance Factor) in lighting calculations?
The age and wear of the luminaire housing
The reduction in the lamp’s luminous output over its lifetime
The type of ballast used with the luminaire
The color temperature change of the lamp over time
Correct answer
The age and wear of the luminaire housing
What is the standard voltage supply for a single-phase residential electrical installation?
230 v
415 v
50 v
110 v
Correct answer
230 v
According to IE Rules, what is the standard frequency of alternating current (AC) supply in India?
60 Hz
50 Hz
25 Hz
100 Hz
Correct answer
60 Hz
An industrial plant with a total load of 750kW at a power factor of 0. 75 lagging is to have its power factor improved to 0. 95 lagging. Calculate the total kVAR of the capacitor bank needed.
510 kVAR
600 kVAR
350 kVAR
415 kVAR
Correct answer
510 kVAR
A high voltage (HV) overhead line with a declared voltage of 11 kV crosses a public road. According to IE Rule 77, what is the minimum vertical clearance required from the ground for a wire that is not earthed?
Correct answer
What does IE Rule 66 address in an electrical installation?
The size of the main switch.
The number of light bulbs in a room
The type of fuse to be used
Precaution against excess leakage
Correct answer
The size of the main switch.
The earthing grid in a substation is primarily designed to control which two types of dangerous potentials?
Voltage potential and Current potential
Touch potential and Step potential
Surge potential and Lightning potential
Phase potential and Neutral potential
Correct answer
Voltage potential and Current potential
How is the current coil of an energy meter connected in a circuit?
In parallel with the supply
In series with the load
In parallel with the load
In series with the voltage coil
Correct answer
In parallel with the supply