Explore topic-wise MCQs in Electrical Engineering Questions.

What is the use of bundled conductors?

What is the critical disruptive voltage of a three phase line which has a conductor of 2 cm in diameter which are spaced equilaterally 1m apart, if the dielectric strength of air is about 30 kV/cm, and air density about 0.952 and irregularity factor 0.9?

Assertion (A): Capacitance grading improves the string efficiency not more than 220 kV. Reason (R): In capacitance grading the units used are of different capacitance and so are not interchangeable.

Which gas is formed near to the conductors by producing a hissing noise?

Which shielding is called the static shielding of the string?

Which of the following statements are true related to corona? 1. It causes radio interference. 2. It attenuates lightning surges. 3. It causes power loss. 4. It amplifies switching surges. The codes are:

A three wire dc distribution makes available how many voltages?

What are ground detectors?

Assertion (A): The string efficiency can be improved by using long cross arms. Reason (R): Use of long cross arms reduces the ratio of capacity to earth to capacity per insulator thereby increasing the string efficiency.

Corona is observed on

If the voltage of the system is about 230 V, then what would be the highest and the lowest permissible voltage?

What is the purpose of guard ring?

Each disc in a suspension type of insulators is designed for what voltage?

For purely domestic loads which type of distribution is employed?

Where is the suspension type of insulators mainly used?

Why is the floating neutral in a three phase supply considered as undesirable?

In a balanced 3 phase, 4 wire ac system the phase sequence is RYB. If the voltage of R phase = 230 ∠ 0° volts, then what will be the B phase?

Where are the strain type of insulators used?

An industrial consumer has a load pattern of 2000 kW, 0.8 lag for 12 hours and 1000 kW UPF for 12 hours. What is its load factor?

Strain and Shackle type insulators are provided on which type of plane?

Which type of loads use 3 phase 4 wire ac system of distribution?

What are boosters?

Which insulator is also called as spool type of insulators?

Which distribution system is energised by two or more generating stations or substations?

A uniformly loaded dc distributor is fed at both ends with equal voltages. In comparison to a similar distributor fed at one end only, what will be the drop at the midpoint be?

Installation of capacitors at suitable locations and of optimum size in a distribution system results in i. Improved voltage regulation. ii. Reduction in distribution power losses. iii. Reduction of kVA rating of distribution transformers. Which among the above statements are correct?

A uniformly loaded dc distributor is fed at both ends with equal voltages. In comparison to a similar distributor fed at one end only, what will be the maximum voltage drop?

Which material is suitable for the manufacture of armour in a single core cable?

The null point of a uniformly loaded distributor feed at equal voltage at both ends lies at

In a distribution system, which of the following items shares the major cost?

What will be the most economical value of diameter of a single core cable to be used on 50 kV, single phase system, when the maximum permissible stress is not exceeding 50 kV / cm?

When steel is reinforced what happens to the composite conductor?

In a 3 core cable, the capacitance between two conductors is 3 μF. What will be the capacitance per phase?

What does capacitance grading of cables mean?

To prevent rotting oil the wooden poles which oil is impregnated to it?