Official previous years' question bank with solutions for DC Generators & Motors, AC 3-Phase Induction Motors, Transformers, Armature Winding, Industrial Wiring, Battery Maintenance, and Earthing Practices.
Marking pattern: +1.00 positive, -0.25 negative (Official BHEL Artisan Pattern).
Steel is obtained by adding __________ to iron.
The value of sin 60° / cos 30° is
A porcelain plate with a groove houses the Nichrome wire in a coil form. Which type of heater is this?
What is the primary purpose of a layout diagram in electrical installation?
An acceleration of 1 m/s² is equal to __________ (in ft/s²).
During earthing, earth electrodes shall be provided at:
Find the HCF of numbers 24, 72 and 100.
Which block in the function generator converts a triangular waveform into a sine waveform?
Which of the following is used as an electrical insulator?
In a circuit, what is the function of an MCB (Miniature Circuit Breaker)?
Divide ₹720 in the ratio 3 : 5.
In an Automatic Power Factor Correction (APFC) panel, the primary function of a relay card is to:
60° is equal to __________ radians.
__________ is a non-ferrous metal.
Which of the following is a ferrous metal?
In electrical drawings, the symbol of a single cell (battery) is represented by:
The symbol with a circle and M inside, with + and signs, represents a/an:
The electrical symbol with a circle and G inside, with + and signs, indicates a/an:
Which of the following is an alloy steel?
What happens if the current exceeds 6A in any phase?
Which of the following is the electrical layout shown below related to?
Pipe electrodes used in earthing shall be made of:
What is the main purpose of an inverter in an electrical circuit?
Which of the following is a physical property of metals?
In a balanced three-phase lamp load, what will the neutral current be?