Power Plant Questions and Answers – Coal Firing Systems – II

This set of Power Plant Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Coal Firing Systems – II”.

1. Presence of free moisture in coal is most disadvantageous during __________
a) combustion of fire slacks on the grates
b) its pulverisation
c) handling (e.g. when emptying wagons)
d) none of the mentioned
View Answer

2. Abrasion index of blast furnace coke should be around __________ percent.
a) 20
b) 35
c) 80
d) 55
View Answer

3. Which of the following petrographic constituents of coal is non-coking?
a) Durain
b) Vitrain
c) Clarain
d) Fussain
View Answer

4. ‘Fat’ coal means a coal having __________
a) low ash content
b) non-smoking tendency
c) high volatile matter
d) low calorific value
View Answer

5. Initial pressure of oxygen introduced into the ‘bomb’ of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.
a) 20-30
b) 60-65
c) 95-100
d) 3-5
View Answer

6. Proximate analysis of coal determines its __________ content.
a) moisture, ash, sulphur & volatile matter
b) moisture, volatile matter, ash & fixed carbon
c) moisture, sulphur, nitrogen & fixed carbon
d) none of the mentioned
View Answer

7. If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be?
a) very high, if the fuel is of low calorific value
b) low
c) high
d) none of the mentioned
View Answer

8. “Overfire burning” in a furnace is a phenomenon characterised by the __________
a) burning of carbon monoxide and other incombustibles in upper zone of furnace by supplying more air
b) supply of excess fuel
c) supply of excess air
d) none of the mentioned
View Answer

9. Atomising steam to fuel oil ratio in a burner should be around __________
a) 0.5
b) 1.5
c) 2.5
d) 3.5
View Answer

10. Presence of free moisture in coal during its high temperature carbonisation __________
a) increases the loss of fine coal dust from the ovens when charging
b) protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls
c) reduces the coking time
d) none of the mentioned
View Answer

Sanfoundry Global Education & Learning Series – Power Plant Engineering.

To practice all areas of Power Plant Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]