Practice Test: Question Set - 24
1. Calorific value as determined by bomb calorimeter is the
- (A) Higher
calorific value at constant volume
- (B) Gross
calorific value at constant pressure
- (C) Lower
calorific value at constant pressure
- (D) Net
calorific value at constant volume
2. High pressure coal gasification is employed in __________ process.
- (A) Lurgi
- (B) Kopper-Totzek
- (C) Winkler
- (D) None of these
3. Calorific value of gobar gas (containing CH4 = 60% , H2 = 10% ; CO2 = 30%) may be about __________ Kcal/Nm3.
- (A) 1,800
- (B) 3,200
- (C) 5,400
- (D) 10,200
4. Lignite is
- (A) A high rank coal
- (B) A coking coal
- (C) Can be used for
gasification and steam generation
- (D) A black banded coal
which burns with a non-smoky yellowish flame
5. Which of the following reactions occuring during coal gasification is called the Neumann reversal reaction?
- (A) 2CO ↔ C + CO2
- (B) CO + H2O ↔ CO2 + H2
- (C) C + H2O ↔ CO + H2
- (D) C + 2H2O ↔ CO2 + 2H2
6. The internal energy of the combustion products is __________ compared to that of reactants.
- (A) More
- (B) Less
- (C) Equal
- (D) More or less;
(depends on the state of fuel.)
7. Coke oven gas compared to blast furnace gas is
- (A) More explosive and
inflammable
- (B) Less poisonous
- (C) Lighter
- (D) All (a), (b) and (c)
8. Gross heating value of coal is __________ the net heating value.
- (A) Higher than
- (B) Lower than
- (C) Same as
- (D) None of these
9. Which of the following gaseous fuels is likely to have the highest gross calorific value?
- (A) Sewage gas
- (B) LPG
- (C) Producer gas
- (D) Natural gas
10. In high temperature carbonization (as compared to low temperature carbonization) of coal
- (A) Coke oven gas yield
is more
- (B) Tar yield is less but
free carbon in tar is more
- (C) Calorific value of
coke oven gas is less
- (D) All (a), (b) and (c)
11. Pick out the wrong statement.
- (A) LPG is also used as
fuel for automobiles & small furnaces and for cutting & welding of
metals
- (B) The minimum
temperature, at which a petroleum oil vapor catches fire and continues to burn,
is called its flash point
- (C) Each ton of petroleum
oil on distillation produces about 30-50 Nm3 of gas
- (D) Maximum yield of
naphthalene is obtained on distillation of crude oil
12. The difference between total carbon and fixed carbon of coal will be minimum in case of
- (A) Lignite
- (B) Bituminous coal
- (C) Anthracite
- (D) High temperature coke
(V.M < 0.5%)
13. Mineral matter content (M) and ash content (A) in coal are approximately related as
- (A) M = 1.1A
- (B) M = A
- (C) M = 1.5A
- (D) M = 2A
14. Increase in ash content of blast furnace coke
- (A) Reduces its
consumption in the furnace
- (B) Increases its
consumption in the furnace
- (C) Does not affect its
consumption in the furnace
- (D) Decreases its
hardness and abrasion resistance
15. Preheating of a gaseous fuel results in increased
- (A) Flame length
- (B) Flame temperature
- (C) Quantity of flue gas
- (D) Ignition temperature
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