Electrical Engineering Mcqs Practice Test

Question 1

At low value of power factor, the cost of generation of a power station will be____________?

Accepted Answer

A. high

Question 2

Compounding of steam turbine is done for_______________?

Accepted Answer

C. reducing the rotor speed

Question 3

The value of the reheat factor is of the order of_____________?

Accepted Answer

C. 1.1 to 1.5

Question 4

Reheat factor is the ratio of_____________?

Accepted Answer

C. cumulative actual enthalpy drop for the stages to total is isentropic enthalpy heat drop

Question 5

Deaerative heating is done to_____________?

Accepted Answer

C. remove dissolved gases in the water

Question 6

Blowing down of boiler water is the process_____________?

Accepted Answer

C. to control the solid concentration in the boiler water by removing some of the concentrated saline water

Question 7

TravelUng grate stoker can burn coals at the rates of____________?

Accepted Answer

D. 150—200 kg/m2 per hour

Question 8

Where unpulverised coal has to be used and boiler capacity is large, the stoker which is used is______________?

Accepted Answer

B. overfeed stoker

Question 9

Example of overfeed type stoker is___________?

Accepted Answer

D. all of the above

Question 10

Under-feed stokers work best for _________ coals high in volatile matter and with caking tendency?

Accepted Answer

C. semibituminous and bituminous

Question 11

In _________ system fuel from a central pulverizing unit is delivered to a bunker and then to the various burners?

Accepted Answer

B. central

Question 12

The amount of air which is supplied for complete combustion is called___________?

Accepted Answer

B. secondary air

Question 13

Bucket elevators are used for___________?

Accepted Answer

B. carrying coal in vertical direction

Question 14

Method which is commonly applied for unloading the coal for small power plant is___________?

Accepted Answer

B. coal accelerators

Question 15

Load carrying capacity of belt conveyor is about___________?

Accepted Answer

B. 50 to 100 tonnes/hr

Question 16

In coal preparation plant, magnetic separators are used to remove___________?

Accepted Answer

C. iron particles

Question 17

Secondary air is the air used to______________?

Accepted Answer

D. provide air round the burners for getting optimum combustion

Question 18

Primary air is that air which is used to_____________?

Accepted Answer

C. transport and dry the coal

Question 19

Caking coals are those which__________?

Accepted Answer

D. form lumps or masses of coke

Question 20

The capacity of large turbo-generators varies from___________?

Accepted Answer

B. 50 to 300 MW