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).
As per the synchroscope method of 3-phase alternators, the correct instant of synchronising is when the busbar and the incoming machine voltages
What is the minimum distance between the bottom of a ceiling fan and the floor as per IE rules?
In a parallel circuit, a 5Ω resistor is connected in parallel with a 10Ω resistor across a 20 V voltage source. What is the current flowing through the 10Ω resistor?
Three ammeters X, Y, Z and two identical light points are connected across a battery as shown in the given figure. Which of the following options is true about the ammeter reading?
What is the main use of a hacksaw in fitting work?
Which of the following is used in a control panel to protect against short circuits and overloads?
What is the purpose of conducting an earth resistance test periodically after Installation?
What is the preferred size of an earth wire for domestic installations, as per Indian standard?
Which type of PLC is best suited for small, standalone applications with a limited number of I/O points, such as controlling a single machine?
What is the primary active material of the positive plate (cathode) in a fully charged lead-acid battery?
Which type of wire joint is commonly used to connect two wires of the same diameter in a straight line?
Which is the last step in a 5S concept used for improvement in an organisation?
What happens to the power consumed if the voltage applied across a fixed resistor is doubled?
Find the current (I) flowing through the circuit shown in the figure given below.
Which of the following is a feature of modular PLCs?
What is the relationship between RMS voltage and average voltage for a square waveform?
Which hand tool is used for nailing, straightening and bending work?
__________ is a manually operated, heavy-duty main switch used to control and isolate three-phase power in an electrical circuit.
What is the primary purpose of biasing a transistor?
In a layout diagram, which of the following is usually NOT displayed?
What is the fundamental principle behind the operation of a three-phase induction motor?
A plan note on an electrical drawing that says 'Install 6x6x4 Junction Box' refers to which aspect of the installation?
In the two-wattmeter method of three-phase power measurement, if the readings of the two wattmeters are equal, then what is the power factor of the load?
In V/f control of a three-phase induction motor, what happens if frequency is reduced but the voltage remains unchanged?
Which insulation material is commonly used in high-voltage power cables above 33 kV?