# Hydroelectric Power Plant MCQ

Electrical Engineering MCQ Questions on Hydro Power Plant. Solved MCQ on Hydro Power Plant with brief answers.

Hydroelectric power plant uses the potential energy of water for electric power generation. Water is stored at a certain height from where it is brought down hitting the turbines at the bottom. The turbines are synchronized with a generator and produce electricity at the output.

## Surge tank in Hydropower plant

Surge tank in Hydropower plant:

1. Is the main reservoir
2. Absorbs pressure swing
3. Reduce surge frequency of electricity
4. Is used with Kaplan turbines

Correct answer: 2. Absorbs pressure swing

## What is the Role of penstock in Hydropower plant

Role of penstock:

1. Carries water to the turbine
2. Absorbs pressure swing
3. Is used with Kaplan turbines

Correct answer: 1. Carries water to the turbine

## Reaction turbines are used for

Reaction turbines are employed for:

3. Both of these
4. None of these

Correct answer: 3. Both of these

## 150 m High Hydropower plant Numerical Problem

A hydro-electric power plant with 150-meter head and 8*10^9 kg of water will generate how much energy if overall efficiency is 82%

1. 3.82 * 10^13 kWh
2. 4.98 * 10^13 kWh
3. 9.65 * 10^13 kWh
4. 9.98 * 10^13 kWh

Correct answer: 3. 9.65 * 10^13 kWh

## Impulse turbines are used for

Impulse turbines are used for:

3. Both of these
4. None of these

Correct answer: 4. None of these

Find explanation here

## Method used to produce electricity in hydroelectric power plant

Of given methods, which method is used to produce electricity in a hydroelectric power plant:

1. Heat energy of water converted to mechanical energy
2. Potential energy of water converted to mechanical energy
3. Ionization of water to obtain chemical energy
4. All of these

Correct answer: 2. Potential energy of water converted to mechanical energy

## Which statement about hydroelectric power plant is wrong

Of given statements which statement about hydroelectric power plant is wrong:

1. Its capital cost is very high
2. A long duration of time is needed for building a hydroelectric power plant
3. A hydroelectric power plant can supply power to fluctuating loads
4. Per unit cost of hydro power plant is higher than diesel plant

Correct answer: 4. Per unit cost of hydro power plant is higher than diesel plant

## What type of hydropower plant does not use a dam

What type of hydropower plant does not use a dam:

1. Impoundment
2. Run of river
3. Pumped storage

Correct answer: 2. Run of river

Water from run-of-river facility channels a portion of a river through a canal or penstock. A run-of-river power plant may not require the use of a dam for storage purposes.

## Which of the following is not an advantage of hydroelectric power plant mcq#9

Of mentioned points which of the following is not an advantage of hydroelectric power:

1. It is a renewable source
2. No standby losses
3. Low running cost
4. Continuous power supply