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Power Systems

Welcome to  Power Systems.

The quiz will randomly run 20 questions from Power Systems which you have to answer in 10 minutes.

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What is the maximum value of a load which consume 500 KWh per day at a load factor of 0.40, if the consumer increases the load factor of 0.50 without increasing the maximum demand?

The conductor of a 10 km long, single phase, two wire line are separated by a distance of 1.5 m. The diameter of each conductor is 1 cm, If the conductors are of copper, the inductance of the circuit is

A three phase 50 Hz line consists of three conductors each of diameter 21 mm, The spacing between the conductors all follows: A – B = 3m, B – C = 5m, C – A = 3.6m If the line operates at 132 k V, the reactive voltampere generatd by the line per km is

The main reason for using high voltage for long distance power transmission is

For certain geometry and operating voltage of the uncompensated transmission line, the ratio of power transfer capability to the surge inpedance loading with increase in length

A 3-phase, 11 kv, 50 Hz, 200 kW load has a power factor of 0.8 lag. A delta connected 3-phase capacitor is used to improve the power factor to unity. The capacitance per phase of the capacitor in micro-farads is

Improving power factor

For high-voltage transmission lines, conductors are suspended from towers so as to

ACSR is used in place of copper in overhead lines because of

Hollow conductors are used in transmission lines to

The voltage across the various discs of a string of suspension insulators having identical discs is different due to

The main criterion for selection of the size of a distribution for a radial distribution system is

The rated voltage of a 3-ph power system is given as

Which one of the following statement. is not correct for the use of bundled conductors in transmission lines?

Series capacitor is used in a transmission line to

A 3-ph, 4-wire system is commonly used for

In a transmission system the feeder supplies power to

Conductors used in HT transmission lines are stranded because of

Distributers are designed from the point of view of

The material used for the manufacture of ground wire is


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