Energy Engineering Mock Test 3

10%

Question 1 of 10

1. Why on some boilers the draft system controls have to be positioned abnormally in soot blowers?

To avoid the soot being blown back into boiler

To avoid the heat of boiler affecting the soot blowers

due to lack of space in the boiler

To get a good grip for blowing out the soot from the boiler

Question 1 of 10

Question 2 of 10

2. What is done when there is requirement for more coal in the ball and race mill?

The primary air flow is increased

The secondary air flow sucks out the light coal particles

The combustion intensity is reduced

The hopper is fully opened

Question 2 of 10

Question 3 of 10

3. Where should coal be dumped?

On solid ground

By mixing with other form of fuels

In the water

Near the plant

Question 3 of 10

Question 4 of 10

4. What is Baghouse?

Filters arranged throughout the system

Filters arranged in parallel form

Filters arranged randomly

Filters arranged alternatively

Question 4 of 10

Question 5 of 10

5. What type of feeder is used to supply the coal in ball and race mill?

Ring main feeder

Radial feeder

Parallel feeder

Rotating table feeder

Question 5 of 10

Question 6 of 10

6. Which type of draught system is used in the pulverized fuel firing system?

Natural draught

Induced draught

Forced draught

Balanced draught

Question 6 of 10

Question 7 of 10

7. What is the main disadvantage of the nuclear weigher?

Consumes large amount of electricity

Accuracy depends on speed of material

They are big in size, requires large amount of space

They are not mobile

Question 7 of 10

Question 8 of 10

8. What is done in the primary stage of the grinding in impact mill?

Coal is dried up to remove the moisture content

Coal is broken down in medium pieces

Coal is reduced to fine granular state

Coal is mixed up with the other state of fuel to improve the combustion efficiency

Question 8 of 10

Question 9 of 10

9. What is the purpose of fixed vanes in the ball and race mill?

For barring the exhaust air to enter back into mill

For easy movement of the coal

Forms a cyclonic flow

For directing the airflow

Question 9 of 10

Question 10 of 10

10. The method of removing soot from the power plant machineries is known as _________

Bioleaching

Soot cleansing

Soot blowing

Centrifugation

Question 10 of 10