# Power Generation MCQs Part 14

Power Generation MCQs Part 14

## Overall efficiency of a steam power station is given by

Overall efficiency of a steam power station is given by:

1. Overall efficiency = Thermal Efficiency * Electrical efficiency
2. Overall efficiency = Thermal Efficiency * Mechanical efficiency
3. Overall efficiency = Thermal Efficiency * Prime mover efficiency
4. None of these

Correct answer: 1. Overall efficiency = Thermal Efficiency * Electrical efficiency

## The penstock, turbine and generator efficiencies of a hydroelectric power plant are 95, 90, and 85 respectively. The overall efficiency of plant is:

The penstock, turbine and generator efficiencies of a hydroelectric power plant are 95, 90, and 85 respectively. The overall efficiency of plant is:

1. 62.7%
2. 72.7%
3. 82.7%
4. 92.7%

Solution:

Overall η = η (penstock) * η (turbine) * η (generator)

Overall η = 0.95 * 0.9 * 0.85 = 0.72675 = 72.7%

## The ideal load factor should be

The ideal load factor should be:

1. 0.3
2. 0.5
3. 0.8
4. 1

## One atomic mass unit is equivalent to:

One atomic mass unit is equivalent to:

1. 210.3 MeV
2. 455.6 MeV
3. 822.4 MeV
4. 931.4 MeV