1154 + Mcqs in Fuels And Combustion McqOptions

1.	/_Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm¬¨‚â• gas ??
A.	Blast furnace gas
B.	Natural gas
C.	Producer gas
D.	Water gas
Answer» C. Producer gas

Discussion

2.	/_The cuprous chloride used in orsat apparatus can absorb?
A.	Only CO
B.	Both CO and CO‚Äö√á√á
C.	Both CO and O‚Äö√á√á
D.	All of the above
Answer» E.

Discussion

3.	/_A good coking coal should have high __________ content.?
A.	Ash
B.	Sulphur & phosphorus
C.	Moisture
D.	None of these
Answer» E.

Discussion

4.	/_Gray King Assay and Swelling Index of a coal is a measure of its?
A.	Swelling characteristics
B.	Abradability
C.	Agglutinating properties
D.	Resistance to impact breakage
Answer» B. Abradability

Discussion

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.	3-5
B.	25-30
C.	60-65
D.	95-100
Answer» C. 60-65

Discussion

6.	/_The calorific value of 'LPG' (50% propane + 50% butane) is about __________ kcal/Nm¬¨‚â•.?
A.	5000
B.	25, 000
C.	10, 000
D.	15, 000
Answer» C. 10, 000

Discussion

7.	/_'Wobbe index' is a characteristic of?
A.	Solid fuels
B.	Gaseous fuels
C.	Liquid fuels
D.	Fat coals
Answer» C. Liquid fuels

Discussion

8.	/_Washing of coal is done to reduce the?
A.	Inherent impurities
B.	Adhering impurities
C.	Mineral matter
D.	Both B and C
Answer» E.

Discussion

9.	/_Blast furnace gas is a very poisonous gas because of its predominantly high __________ content.?
A.	H‚Äö√á√áO
B.	CO‚Äö√á√á
C.	CO
D.	CH‚Äö√á√ë
Answer» D. CH‚Äö√á√ë

Discussion

10.	/_The shift conversion reaction taking place during water gas manufacture is given by?
A.	C + H‚Äö√á√áO ‚Äö√º‚àë CO + H‚Äö√á√á
B.	C + 2H‚Äö√á√áO ‚Äö√º‚àë CO‚Äö√á√á + 2H‚Äö√á√á
C.	CO + H‚Äö√á√áO ‚Äö√º‚àë CO‚Äö√á√á + H‚Äö√á√á
D.	None of these
Answer» D. None of these

Discussion

11.	/_Coal tar fuel - 200 (CTF 200) is a mixture of?
A.	Pitch and creosote oil
B.	Light oil and pitch
C.	Anthracene and crecosote oil
D.	Solar oil and pitch
Answer» B. Light oil and pitch

Discussion

12.	/_Which of the following is not a product of tar distillation??
A.	Phenol & naphthalene
B.	Benzol & pitch
C.	Anthracene & creosote
D.	None of these
Answer» E.

Discussion

13.	/_Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.?
A.	Sulphur
B.	Oxygen
C.	Hydrogen
D.	Carbon
Answer» C. Hydrogen

Discussion

14.	/_Volatile matter content in coking coal may be about __________ percent.?
A.	1
B.	7
C.	22
D.	46
Answer» D. 46

Discussion

15.	/_During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.?
A.	Density
B.	Porosity
C.	Electrical resistivity
D.	None of these
Answer» B. Porosity

Discussion

16.	/_Which of the following is the most poisonous gas??
A.	Coke oven gas
B.	Producer gas
C.	Blast furnace gas
D.	L.D. converter gas
Answer» E.

Discussion

17.	/_Width of the coke oven towards coke side is slightly more than that on pusher side to?
A.	Facilitate easy discharging of coke as it swells during carbonisation
B.	Facilitate uniform heating of the oven
C.	Increase the output of the coke
D.	None of these
Answer» B. Facilitate uniform heating of the oven

Discussion

18.	/_Which of the following will be unsuitable for dust cleaning from flue gas at 400¬¨‚àûC from a pulverised coal fired boiler ??
A.	Multicyclones
B.	Bag filter
C.	Wet scrubber
D.	Hydrocyclones
Answer» C. Wet scrubber

Discussion

19.	/_'Wind loss' resulting from unscientific storage of coal may be the order of about __________ percent.?
A.	2.5
B.	7.5
C.	10.5
D.	14.5
Answer» B. 7.5

Discussion

20.	/_Coke oven gas constitutes mainly of?
A.	H‚Äö√á√á & CO
B.	H‚Äö√á√á & CH‚Äö√á√ë
C.	CH‚Äö√á√ë & CO
D.	H‚Äö√á√á & CO‚Äö√á√á
Answer» C. CH‚Äö√á√ë & CO

Discussion

21.	/_Pick the odd man out.?
A.	Briquettes
B.	Wood
C.	Oil gas
D.	Pitch creosote mixture
Answer» C. Oil gas

Discussion

22.	/_In high temperature carbonisation of coal compared to low temperature carbonisation?
A.	Yield of ammonia is less
B.	Aromatic content of tar is low
C.	H‚Äö√á√á content in the coke oven gas is more
D.	Calorific value of the coke oven gas is lower
Answer» D. Calorific value of the coke oven gas is lower

Discussion

23.	/_With increase in moisture content of coal, its?
A.	Calorific value increases sometimes
B.	Bulk density always decreases
C.	Clinkering tendency during combustion increases
D.	None of these
Answer» E.

Discussion

24.	/_C.V. (kcal/Nm¬¨‚â•) of gaseous fuels __________ with increase in molecular weight.?
A.	Decreases
B.	Increases
C.	Remains constant
D.	May increase or decrease, depends on combustibles
Answer» E.

Discussion

25.	/_Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm¬¨‚â•.?
A.	4000
B.	2500
C.	6500
D.	10000
Answer» D. 10000

Discussion

26.	/_Low temperature oxidation of coal is accelerated by the?
A.	Storage in large heaps
B.	Storage in compressed piles
C.	Absence of porous or friable particles
D.	All of the above
Answer» B. Storage in compressed piles

Discussion

27.	%_Fossil fuels mean_%
A.	Solid fuels
B.	Liquid fuels
C.	Those fuels which are found in the crust of earth
D.	Premature fuels with low calorific value
Answer» D. Premature fuels with low calorific value

Discussion

28.	%_Blast furnace gas burns with a bluish flame, because of the presence of_%
A.	CO
B.	CH‚Äö√á√ë
C.	CO‚Äö√á√á
D.	S
Answer» B. CH‚Äö√á√ë

Discussion

29.	%_High pressure coal gasification is employed in __________ process._%
A.	Lurgi
B.	Kopper-Totzek
C.	Winkler
D.	None of these
Answer» B. Kopper-Totzek

Discussion

30.	%_High temperature in gasification of coal favours_%
A.	High production of CO‚Äö√á√á
B.	Low production of CO‚Äö√á√á
C.	High production of CO
D.	Both B and C
Answer» E.

Discussion

31.	%_Blast furnace coke is made from coal by_%
A.	Low temperature carbonisation
B.	High temperature carbonisation
C.	Medium temperature carbonisation
D.	Heating the coal in an oven in presence of air
Answer» C. Medium temperature carbonisation

Discussion

32.	%_Coal is heated in absence of air for 7 minutes at a temperature of about __________ ¬¨‚àûC, during its volatile matter determination for proximate analysis._%
A.	550
B.	750
C.	950
D.	1150
Answer» D. 1150

Discussion

33.	%_Width of the coke oven towards coke side is slightly more than that on pusher side to_%
A.	Facilitate easy discharging of coke as it swells during carbonisation
B.	Facilitate uniform heating of the oven
C.	Increase the output of the coke
D.	None of these
Answer» B. Facilitate uniform heating of the oven

Discussion

34.	%_'Wind loss' resulting from unscientific storage of coal may be the order of about __________ percent._%
A.	2.5
B.	7.5
C.	10.5
D.	14.5
Answer» B. 7.5

Discussion

35.	%_Coke oven gas constitutes mainly of_%
A.	H‚Äö√á√á & CO
B.	H‚Äö√á√á & CH‚Äö√á√ë
C.	CH‚Äö√á√ë & CO
D.	H‚Äö√á√á & CO‚Äö√á√á
Answer» C. CH‚Äö√á√ë & CO

Discussion

36.	%_Which of the following will be unsuitable for dust cleaning from flue gas at 400¬¨‚àûC from a pulverised coal fired boiler ?_%
A.	Multicyclones
B.	Bag filter
C.	Wet scrubber
D.	Hydrocyclones
Answer» C. Wet scrubber

Discussion

37.	%_Pick the odd man out._%
A.	Briquettes
B.	Wood
C.	Oil gas
D.	Pitch creosote mixture
Answer» C. Oil gas

Discussion

38.	%_Volatile matter content in coking coal may be about __________ percent._%
A.	1
B.	7
C.	22
D.	46
Answer» D. 46

Discussion

39.	%_Blast furnace gas is a very poisonous gas because of its predominantly high __________ content._%
A.	H‚Äö√á√áO
B.	CO‚Äö√á√á
C.	CO
D.	CH‚Äö√á√ë
Answer» D. CH‚Äö√á√ë

Discussion

40.	%_Which of the following is not a product of tar distillation?_%
A.	Phenol & naphthalene
B.	Benzol & pitch
C.	Anthracene & creosote
D.	None of these
Answer» E.

Discussion

41.	%_During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass._%
A.	Density
B.	Porosity
C.	Electrical resistivity
D.	None of these
Answer» B. Porosity

Discussion

42.	%_The shift conversion reaction taking place during water gas manufacture is given by_%
A.	C + H‚Äö√á√áO ‚Äö√º‚àë CO + H‚Äö√á√á
B.	C + 2H‚Äö√á√áO ‚Äö√º‚àë CO‚Äö√á√á + 2H‚Äö√á√á
C.	CO + H‚Äö√á√áO ‚Äö√º‚àë CO‚Äö√á√á + H‚Äö√á√á
D.	None of these
Answer» D. None of these

Discussion

43.	%_Presence of __________ in a dry gaseous fuel does not contribute to its calorific value._%
A.	Sulphur
B.	Oxygen
C.	Hydrogen
D.	Carbon
Answer» C. Hydrogen

Discussion

44.	%_Which of the following is the most poisonous gas?_%
A.	Coke oven gas
B.	Producer gas
C.	Blast furnace gas
D.	L.D. converter gas
Answer» E.

Discussion

45.	%_Which of the following has the highest calorific value (kcal/Nm¬¨‚â•) ?_%
A.	Carburetted water gas
B.	Gobar gas
C.	Natural gas
D.	LPG
Answer» E.

Discussion

46.	%_A coal containing high amount of volatile matter will have_%
A.	Low ignition temperature
B.	Very little ash content
C.	High fusion point of its ash
D.	Low adiabatic flame temperature
Answer» B. Very little ash content

Discussion

47.	%_The hottest part of the flame lies in its____zone._%
A.	Non-luminous
B.	Luminous
C.	Yellow
D.	Unburnt gases
Answer» B. Luminous

Discussion

48.	%_A coal having higher volatile matter content, has lower_%
A.	Smoking tendency on burning
B.	Coke oven gas yield on carbonisation
C.	Chance of catching fire during storage in open space
D.	Ignition temperature
Answer» E.

Discussion

49.	%_Which of the following is not a micro component present in coal?_%
A.	Micrinite
B.	Clarain
C.	Fusinite
D.	Liptinite
Answer» C. Fusinite

Discussion

50.	%_Which of the following has the highest flame velocity?_%
A.	H‚Äö√á√á
B.	CO
C.	CH‚Äö√á√ë
D.	C‚Äö√á√áH‚Äö√á√ú
Answer» B. CO

Discussion

Explore topic-wise MCQs in Testing Subject.

*/*_Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm¬¨‚â• gas ??

*/*_The cuprous chloride used in orsat apparatus can absorb?

*/*_A good coking coal should have high __________ content.?

*/*_Gray King Assay and Swelling Index of a coal is a measure of its?

*/*_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.?

*/*_The calorific value of 'LPG' (50% propane + 50% butane) is about __________ kcal/Nm¬¨‚â•.?

*/*_'Wobbe index' is a characteristic of?

*/*_Washing of coal is done to reduce the?

*/*_Blast furnace gas is a very poisonous gas because of its predominantly high __________ content.?

*/*_The shift conversion reaction taking place during water gas manufacture is given by?

*/*_Coal tar fuel - 200 (CTF 200) is a mixture of?

*/*_Which of the following is not a product of tar distillation??

*/*_Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.?

*/*_Volatile matter content in coking coal may be about __________ percent.?

*/*_During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.?

*/*_Which of the following is the most poisonous gas??

*/*_Width of the coke oven towards coke side is slightly more than that on pusher side to?

*/*_Which of the following will be unsuitable for dust cleaning from flue gas at 400¬¨‚àûC from a pulverised coal fired boiler ??

*/*_'Wind loss' resulting from unscientific storage of coal may be the order of about __________ percent.?

*/*_Coke oven gas constitutes mainly of?

*/*_Pick the odd man out.?

*/*_In high temperature carbonisation of coal compared to low temperature carbonisation?

*/*_With increase in moisture content of coal, its?

*/*_C.V. (kcal/Nm¬¨‚â•) of gaseous fuels __________ with increase in molecular weight.?

*/*_Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm¬¨‚â•.?

*/*_Low temperature oxidation of coal is accelerated by the?

%_Fossil fuels mean_%

%_Blast furnace gas burns with a bluish flame, because of the presence of_%

%_High pressure coal gasification is employed in __________ process._%

%_High temperature in gasification of coal favours_%

%_Blast furnace coke is made from coal by_%

%_Coal is heated in absence of air for 7 minutes at a temperature of about __________ ¬¨‚àûC, during its volatile matter determination for proximate analysis._%

%_Width of the coke oven towards coke side is slightly more than that on pusher side to_%

%_'Wind loss' resulting from unscientific storage of coal may be the order of about __________ percent._%

%_Coke oven gas constitutes mainly of_%

%_Which of the following will be unsuitable for dust cleaning from flue gas at 400¬¨‚àûC from a pulverised coal fired boiler ?_%

%_Pick the odd man out._%

%_Volatile matter content in coking coal may be about __________ percent._%

%_Blast furnace gas is a very poisonous gas because of its predominantly high __________ content._%

%_Which of the following is not a product of tar distillation?_%

%_During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass._%

%_The shift conversion reaction taking place during water gas manufacture is given by_%

%_Presence of __________ in a dry gaseous fuel does not contribute to its calorific value._%

%_Which of the following is the most poisonous gas?_%

%_Which of the following has the highest calorific value (kcal/Nm¬¨‚â•) ?_%

%_A coal containing high amount of volatile matter will have_%

%_The hottest part of the flame lies in its____zone._%

%_A coal having higher volatile matter content, has lower_%

%_Which of the following is not a micro component present in coal?_%

%_Which of the following has the highest flame velocity?_%

/_Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm¬¨‚â• gas ??

/_The cuprous chloride used in orsat apparatus can absorb?

/_A good coking coal should have high __________ content.?

/_Gray King Assay and Swelling Index of a coal is a measure of its?

/_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.?

/_The calorific value of 'LPG' (50% propane + 50% butane) is about __________ kcal/Nm¬¨‚â•.?

/_'Wobbe index' is a characteristic of?

/_Washing of coal is done to reduce the?

/_Blast furnace gas is a very poisonous gas because of its predominantly high __________ content.?

/_The shift conversion reaction taking place during water gas manufacture is given by?

/_Coal tar fuel - 200 (CTF 200) is a mixture of?

/_Which of the following is not a product of tar distillation??

/_Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.?

/_Volatile matter content in coking coal may be about __________ percent.?

/_During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.?

/_Which of the following is the most poisonous gas??

/_Width of the coke oven towards coke side is slightly more than that on pusher side to?

/_Which of the following will be unsuitable for dust cleaning from flue gas at 400¬¨‚àûC from a pulverised coal fired boiler ??

/_'Wind loss' resulting from unscientific storage of coal may be the order of about __________ percent.?

/_Coke oven gas constitutes mainly of?

/_Pick the odd man out.?

/_In high temperature carbonisation of coal compared to low temperature carbonisation?

/_With increase in moisture content of coal, its?

/_C.V. (kcal/Nm¬¨‚â•) of gaseous fuels __________ with increase in molecular weight.?

/_Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm¬¨‚â•.?

/_Low temperature oxidation of coal is accelerated by the?