Power Systems Objective Questions & Answers – Set 14

Which cooling is preferred for large turbine generator

A 25 MVA, 11 kV alternator is supplying full load at a point of 0.75 lagging. Determine the percentage increase in earning capacity when it is operated at improved power factor of 0.96 lagging.

Advantages of per unit system is/are

If the percentage reactance of an element is 20 % and the full load current is 50 Amp, the short circuit current will be

What will be the thermal efficiency of a 240 V, 1000 W electric kettle if it brings 2 liters of water at 15° C to boiling point 15 Minutes

Reactance relays are used for the protection of

If the breakdown voltage of the insulator is high, the thickness of the insulator is

The amount of ash content in Indian coal

Efficiency of thermal power plant can be taken as

Load frequency control is achieved by properly matching the individual machines

Most commonly used material for insulator is

A diesel power station has fuel consumption of 0.28 Kg per kWh. The calorific value of fuel is being 10000 KCal / kg. Determine the overall efficiency

If the percentage reactance of an element is 20 % and the full load current is 50 Amp, the short circuit current will be

In which power plant, the thermal efficiency is quite low

Operating time of pumped storage plant is

Where do compounding done in thermal power plants

To improve the efficiency of thermal power plant ________________ is placed between boiler and turbine.

Mechanical energy is supplied to a DC generator at the rate of 4200 J / S. The generator delivers 32.2 Amp at 120 V. How much energy is cost per minute of operation

In thermal power plants the size of coal after crushing

How to find the total number of strands (N) when number of layers (x) are given

Example of base load stations are

Which of the following methods is/are used for reactive or voltage compensation

Uses of diesel power stations

Sparse matrix is matrix which contain

The main objectives of power system is/are

Ferranti effect will not occur in which of the following transmission lines

Which of the following is not base load power plant

The time taken by the turbine to fall to 0 rpm speed from 3000 rpm is called

The only place where slip ring induction motors used in thermal power plants is

A steam power generation has an overall efficiency of 20 %. 0.6 Kg of coal is burnt per kWh of electrical energy generated. Calculated the calorific value of fuel