Electrical Engineering MCQs for competitive tests, job tests, university exams are provided on various Electrical and Electronics topics.
Electrical Engineering XYZ MCQ on SI Unit of Heat with answer and brief explanatory exxplanation. Unit of heat is: Correct answer: 1. Calorie Explanation: The unit of heat is the joule (J). Heat is a form of energy, and the joule is the standard unit for measuring energy in the International System of Units (SI). … Read more
In large size transformers, the oil serves to: Correct answer: 3. Both of these Explanation: Large power transformers have their core and windings submerged in an oil bath to transfer heat and muffle noise, and also to displace moisture which would otherwise compromise the integrity of the winding insulation. Heat-dissipating “radiator” tubes on the outside … Read more
Electrical Engineering XYZ MCQ on kilowatt hour is unit of kilowatt hour is unit of: Correct answer: The correct answer is: 2. Energy Explanation: In summary, a kilowatt-hour is a unit of energy, representing the total amount of energy consumed or produced over a period of one hour at a rate of one kilowatt.
Electrical Engineering XYZ MCQ on Power Plant with Highest Initial Cost Power Plant with Highest Initial Cost is: Correct answer: 3. Nuclear power plant Explanation: In summary, among the given options, nuclear power plants generally have the highest initial cost due to the sophisticated technology, safety considerations, and specialized materials involved in their construction.
Electrical Engineering XYZ MCQ on Magnetic Flux Density is Scalar or Vector Quantity Magnetic Flux Density is Scalar or Vector Quantity: Correct answer: 2. Vector quantity The correct answer to this Electrical Engineering XYZ MCQ is Vector. Let’s explain how Explanation: In summary, magnetic flux density is a vector quantity, making option 2 the correct … Read more
Electrical Engineering XYZ MCQ on BJT. Number of PN Junctions on BJT are: Correct answer: 2. Two Also see: BJT Handbook Explanation of MCQ The BJT is constructed with three doped semiconductor regions separated by two pn junctions. The three regions are called emitter, base, and collector. The figure below depicts npn type of BJT … Read more
Electrical Engineering MCQ on Power Generation and Power Plant Engineering. The value of plant capacity factor is Correct answer: 3. Less than 1 Explanation: Plant capacity factor is defined as the ratio of average power to the plant capacity. Pcf = Average power/Plant capacity The average power output of a plant is less than the … Read more
Electrical Engineering XYZ MCQ on Power Transmission lines Which of the following factor decides the insulation level of 400 kV, EHV line: Correct answer: 4. Switching over voltage Explanation: In case of transmission line voltages up to 230 kV the insulation level is decided by the requirement of protection against lightning. In case of EHV, … Read more
Electrical Engineering XYZ MCQ on Power Transmission lines Effect of capacitance is negligible in case of: Correct answer: 1. Short transmission lines Also see: The lines below what length are considered short transmission lines Explanation: Capacitance becomes negligible in the case of short transmission lines. In a transmission line, capacitance is one of the three … Read more
Electrical Engineering MCQ on Power Transmission The total diameter of a three-layer ACSR conductor is 5 cm. The diameter of each strand will be Correct answer: 1. 1 cm Explanation: Mathematical formula for total diameter of an ACSR conductor D = (2x-1)*d Where in above equation Therefore, 5 = (2*3-1)*d d = 1 cm