Module 3: Variable Loads of a Power Plant

Question 1

The load on a power station varies from time to
time due to uncertain demands of the consumers and is known as ______.

Answer 1

variable loads on the power station.

Question 2

The curve showing the variation of load on the power station with respect to (w.r.t) time is known as a ______.

Answer 2

load curve

Question 3

shows the variations of load w.r.t. time during the day.

Answer 3

daily load curve

Question 4

Can be obtained
from the daily load curves of that month. Generally used to
fix the rates of energy.

Answer 4

monthly load curve

Question 5

Is obtained by considering the monthly load curves of that particular year. Generally used to determine the annual load factor.

Answer 5

yearly load curve

Question 6

It is the sum of continuous ratings of all the equipments connected to supply system.

Answer 6

Connected Load

Question 7

The sum of the continuous ratings of all the equipments in the consumer’s premises is the “_________” of the consumer.

Answer 7

connected load

Question 8

It is the greatest demand of load on the power station during a given period.

Answer 8

maximum demand

Question 9

The load on the power station varies from time to time. The maximum of all the demands that have occurred during a given period (say a day) is the _______.

Answer 9

maximum demand

Question 10

It is the ratio of maximum demand on the power station to its connected load.

Answer 10

Demand Factor

Question 11

The knowledge of _______ is vital in determining the capacity of the plant equipment.

Answer 11

demand factor

Question 12

The average of loads occurring on the power station in a given period (day or month or year).

Answer 12

Average load

Question 13

The ratio of average load to the maximum demand during a given period is known as load factor.

Answer 13

Load Factor

Question 14

The ratio of the sum of individual maximum demands to the maximum demand on power station.

Answer 14

Diversity Factor

Question 15

It is the ratio of actual energy produced to the maximum possible energy that could have been produced during a given period.

Answer 15

Plant Capacity Factor

Question 16

is an indication of the reserve capacity of the plant.

Answer 16

Plant Capacity Factor

Question 17

It is that reserve generating capacity which is not in operation but can be made available for service.

Answer 17

Cold Reserve

Question 18

It is that reserve generating capacity which is in operation but not in service.

Answer 18

Hot Reserve

Question 19

It is that reserve generating capacity which is connected to
the bus and is ready to take the load.

Answer 19

Spinning Reserve

Question 20

It is ratio of kWh generated to the product of plant capacity and the number of hours for which the plant was in operation.

Answer 20

Plant Use Factor

Question 21

When the load elements of a load curve are arranged in the order of descending magnitudes, the curve thus obtained is called a ______.

Answer 21

load duration curve

Question 22

A device which taps electrical energy from the electric power system is called a ____ on the system.

Answer 22

load

Question 23

consists of lights, fans, refrigerators, heaters, television, small motors for pumping water etc.

Answer 23

Domestic load

Question 24

consists of lighting for shops, fans and electric appliances used in restaurants etc.

Answer 24

Commercial load

Question 25

consists of load demand by industries.

Answer 25

Industrial load

Question 26

consists of street lighting, power required for water supply and drainage purposes.

Answer 26

Municipal load

Question 27

This type of load is the electric power needed for pumps driven by motors to supply water to fields. Generally this type of load is supplied for 12 hours during night.

Answer 27

Irrigation load

Question 28

This type of load includes tram cars, trolley buses, railways etc.

Answer 28

Traction load

Question 30

Start-up time of Spinning Reserve?

Answer 30

1-2 hrs

Question 31

Start-up time of Hot Reserve?

Answer 31

1-2 hrs

Question 32

Start-up time of Cold Reserve

Answer 32

2 hrs - 24 hrs