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).
Which of the following is NOT a benefit of using the 5S concept in an organisation?
The open-circuit test on a large power transformer is most often performed by applying a rated voltage to the low-voltage (LV) side while keeping the high-voltage (HV) side open. The primary reason for this procedure is to:
If a person is bleeding severely from a cut on their arm, what is the most important immediate action to take?
When starting to measure current, what setting should one choose first on the multimeter?
What is a grounding system's primary purpose, especially with regard to current?
Which characteristic curve of a DC generator shows the relation between the terminal voltage and load current?
Which of the following is a commercially used bidirectional switching device?
The resistance of metals __________ with a rise in temperature because they have a __________
Why is a short-circuit test performed on a transformer?
Each cell is rated as 1.5 volts and 2 AH. How should the cells be connected to make a battery of 6 volts and 2 AH?
What does a red safety sign typically indicate in an electrical environment?
What is the preferred dimension of the copper plate used in plate earthing?
In a series RLC circuit, what condition must be met for the power factor to be leading?
A series RLC circuit has a resistance R = 3 Ω, an inductive reactance XL = 8 Ω and a capacitive reactance XC = 4 Ω What is the magnitude of the impedance?
What is the main purpose of earthing in an electrical system?
What is the most widely used wiring method in industrial electrical installations?
Which of the following is the initial cause of rotation of a three-phase induction motor?
Which of the following will increase the induced EMF in an alternator?
Why can a Moving Iron (MI) instrument be used for both, AC and DC?
Which factor should be considered first when selecting a site for installing an earth electrode to achieve low earth resistance?
What is the primary function of an electrolyte within any electrochemical cell or battery?
The outer layers of a PNP transistor are made of which type of semiconductor material?
What is the minimum depth recommended for earthing electrode installation as per standard norms?
What does the average forward current rating of a diode signify?
Which change is required for a DC series motor to rotate at a speed higher than its rated speed?