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).
A resistor has red, violet, orange, and gold color bands. What are its resistance value and tolerance?
Why is it important to set the charging current to the recommended value while charging a battery?
Which of the following diode parameters indicates the maximum reverse voltage that it can withstand?
In electrical engineering, a layout diagram mainly:
To produce a magnetic field, the _____ winding configuration is typically found on the rotor of an alternator.
In the context of electrical circuits, what does Kirchhoff's Current Law (KCL) state?
On which principle does the operation of a 3-phase induction motor rely?
_____ is a dedicated instrument specifically designed to measure the resistance of an earthing system.
What is the function of a filter in a rectifier circuit?
What does the multimeter circuitry shown in the diagram indicate?
If a 1-phase half-wave rectifier is supplied with an AC voltage of V volts (RMS), what will be the Peak Inverse Voltage (PIV) across the diode?
If power is measured in watts and time in hours, what is the unit of electrical energy?
Which of the following is NOT a method of speed control from the rotor side?
Calculate the inductive reactance ($X_L$) for an inductor of 0.1 H at 50 Hz.
Which wiring method provides the highest degree of protection against fire hazards?
Which of the following is NOT a benefit of shop floor maintenance?
Rusting occurs when iron reacts with _____.
What is the main objective of composting?
Inductive reactance $X_L$ is given by the formula _____.
What will happen if HCl is used in a nickel-iron cell?
What acts as the negative electrode in a carbon-zinc dry cell?
Identify whether the following statements regarding the starting of a single-phase induction motor are true or false.
1. This is done by placing a capacitor in parallel with the main winding.
2. This is done by connecting an auxiliary winding in series with a capacitor.
Which of the following is NOT a function of earthing?
Why are salt and charcoal used around the earth electrode in plate earthing?
If the sum of voltages around a loop is not equal to zero (zero), which principle is being violated?