Electrical Engineering Mcqs

Given below is the list of top 20 MCQs on Basic Electrical laws and theorems. Test your basic knowledge of Ohm’s, Kirchhoff’s, Norton, Thevenin, Millman’s theorem, current divider, voltage divider, delta, wye, series, and parallel networks. The correct statement of Ohm’s law 1. The correct statement of Ohm’s law: Voltage is inversely proportional to the power … Read more

1. The advantage of DC system over AC systems: Skin effect is absent Smaller corona Inductive and capacitive losses are absent All of these None of these Correct answer: 4. All of these 2. During insulator grading for improving string efficiency: Top unit has minimum capacitance Bottom unit has minimum capacitance Central unit has minimum capacitance … Read more

1. The point which should be considered while designing transmission systems: Selection of transmission route Expansion planning Network analysis Observation of Reliability All of these Correct answer: 5. All of these 2. Short transmission lines are modeled by: Series resistance and series inductance Series resistance and series capacitance Series resistance and shunt capacitance Series resistance, … Read more

1. Voltage regulation of a practical transmission line should be: Low Higher Zero Infinity Correct answer: 1. Low 2. As the spacing between conductor increases the inductance: Increases Decreases Remains constant Correct answer: 1. Increases 3. The economic factor associated with HV transmission: Small generating stations can be designed Smaller cross-sectional area of conductors Sagging … Read more

Electrical Power Transmission Multiple Choice Questions Part 7 Which one the following is not a standard voltage in European grids 1. Which one the following is not a standard voltage in European grids: 130 kV 275 kV 322 kV 400 kV Correct answer: 3. 322 kV The most obvious and foremost requirement for connected lines … Read more

1. Cross arms are installed over the transmission lines to: Improve visual look Support insulators Reduce radio interference Increase shunt capacitance Correct answer: 2. Support insulators 2. In case of a strike, it is desirable that insulator should fail by: Puncture Flash-over Both of above Correct answer: 2. Flash-over 3. The effect which is ignored in … Read more

1. Which one of the following is not standard voltage in USA: 230 kV 345 kV 400 kV 500 kV 765 kV Correct answer: 3. 400 kV 2. The phenomenon of corona occurs on: HVDC transmission lines HVAC transmission lines Both of these None of these Correct answer: 3. Both of these 3. Skin effect: … Read more

1. The correct model of AC power generation and transmission flow from left to right: Alternator, Step up, Step down, Step down Alternator, Step down, Step down, Step up Alternator, Step up, Step up, Step down Alternator, Step up, Step down, Step up Correct answer: 1. Alternator, Step up, Step down, Step down 2. The correct model of … Read more

1. DC transmission is _____ less expensive than a transmission for the same power ratings: 20% 33% 66% 80% Correct answer: 2. 33% 2. Overhead transmission lines have a break-even distance of: 200 mile 500 mile 1000 mile 5000 mile Correct answer: 2. 500 mile 3. With a decrease in the size of the conductor … Read more

1. A counterpoise is buried under a transmission line: To increase the ground resistance To decrease the ground resistance To increase design strength To increase inductance Correct answer: 2. To decrease the ground resistance 2. The disadvantage of Low power factor: Raises rating of transmission equipment Increased voltage drops Poor voltage regulation All of these None … Read more