# Power Generation MCQs Part 22

Power Generation MCQs Part 22

Contents

## Demand factor is usually

Demand factor is usually:

1. More than 1
2. Equal to 1
3. Less than 1
4. None of these

Correct answer: 3. Less than 1

## Fuel transportation cost is minimum in

Fuel transportation cost is minimum in:

1. Steam power plant
2. Diesel power plant
3. Nuclear power plant
4. Hydroelectric power plant

Correct answer: 4. Hydroelectric power plant

## If Q = discharge in m³/s, η = Overall efficiency of plant, h = head in m and w = density of water in kg/m³ then power output in kW of hydro-power station is equal to

If Q = discharge in m³/s, η = Overall efficiency of plant, h = head in m and w = density of water in kg/m³ then power output in kW of hydro-power station is equal to:

1. 0.736/75 Qwh η
2. 0.92/75 Qwh η
3. 75/0.736 Qwh η
4. 75/0.92 Qwh η

Correct answer: 1. 0.736/75 Qwh η

Solution:

Power output = m g h η = (Qw) * g * h * η = (Qw) * 9.8 * h * η watts

= {(Qw) * g * h * η}/1000 kW = 0.0098 Qwh η kW = 0.736/75 Qwh η

## The power system experiences peak demand from

The power system experiences peak demand from:

1. Midnight to 8 AM
2. 6 PM to 10 PM
3. 2 PM to 5 PM
4. 8 AM to 2 PM

Correct answer: 2. 6 PM to 10 PM

## The majority of generators in thermal power plants run at

The majority of generators in thermal power plants run at:

1. 750 RPM
2. 1000 RPM
3. 1500 RPM
4. 3000 RPM