# Power Generation MCQs Part 19

Power Generation MCQs Part 19

## A base load power plant has capacity of 18 MW. The annual output of power plant is 101.35 * 10^6 kWh. The annual load factor of station is

A base load power plant has capacity of 18 MW. The annual output of power plant is 101.35 * 10^6 kWh. The annual load factor of station is:

1. 40.3kW
2. 52.3kW
3. 64.3 kW
4. 76.3 kW

Correct answer: 3. 64.3 kW

Solution:

Annual load factor = 101.35 * 10^6/(18 * 10^3 * 8760) = 0.642  = 64.3kW

## A factory is located near waterfall where the usable head for power generation is 30 m. The river flow is 10 m³/sec. If plant efficiency is 80%, the power developed is

A factory is located near waterfall where the usable head for power generation is 30 m. The river flow is 10 m³/sec. If plant efficiency is 80%, the power developed is:

1. 2154.4 kW
2. 2254.4 kW
3. 2354.4 kW
4. 2364.4 kW

Correct answer: 3. 2354.4 kW

Solution:

Discharge (Q) = 10m³/sec

Water head (H) = 30 m

η(overall) = 0.8

——————

Wt of water available/sec (W) = 10 * 1000 * 9.81 = 98100 N

——————

Power developed = W * H * η (overall) = 2354.4 * 10³ = 2354.4 kW

## Usually the load factor is:

Usually the load factor is:

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

Correct answer: 1. Less than 1

Explanation: Load factor is mathematically defined as:
Load factor = Average load / Maximum demand

The average load is always smaller than maximum demand, so, load factor is always smaller than 1.

## The base load power station supplies load for a day

The base load power station supplies load for a day:

1. 5 hours
2. 12 hours
3. 18 hours
4. 24 hours

Correct answer: 4. 24 hours

## In interconnected grid system, the diversity factor of whole system

In interconnected grid system, the diversity factor of whole system:

1. Increases
2. Decreases
3. Remains constant
4. None of these

Correct answer: 1. Increases

Explanation: The interconnected grid system is defined as the system having several generation stations or units connected in parallel. Load curves of different interconnected stations are generally different. As a result of this maximum demand on system is much reduced as compared to sum of individual maximum demands on different power stations. Simply, saying the diversity factor of system increases.