Fuels And Combustion MCQ Questions & Answers | Chemical Engineering

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71.
As time passes, the calorific value of stored coal

A. Decreases

B. Increases

C. Remains unaltered

D. May increase or decrease (depends on the method of storage)

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72.
Cannel coal

A. Is non-coking

B. Has a high volatile matter content and burns with a luminous smoky flame

C. Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named

D. All of the above

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73.
In flue gas analysis by Orsat's apparatus, carbon monoxide is absorbed by

A. Cuprous chloride

B. Potassium hydroxide

C. Alkaline pyrogallol solution

D. None of these

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74.
Low temperature carbonisation of coal produces

A. Metallurgical coke

B. Soft coke

C. Very low calorific value coke oven gas

D. No by-products

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75.
High temperature carbonisation of coal produces

A. Inferior coke compared to low temperature carbonisation

B. Less of gases compared to liquid products

C. Large quantity of tar compared to low temperature carbonisation

D. None of these

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76.
Fuel combustion is never cent per cent efficient due to

A. Incomplete combustion

B. Dry gas/stack gas loss

C. Moisture loss

D. All of the above

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77.
Coal is pulverised before burning in large capacity boiler furnaces mainly to

A. Ensure its complete combustion

B. Facilitate easy ash removal

C. Enhance its calorific value

D. Provide trouble free operation

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78.
Spontaneous combustion of coal on storage results due to

A. Inadequate ventilation

B. Low temperature oxidation

C. Storage in large heaps with small surface to volume ratio

D. All of the above

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79.
Coalification means the

A. Process of conversion of lignite into anthracite

B. Underground gasification of coal

C. Complete combustion of coal

D. Direct hydrogenation of coal

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80.
Coking coals are invariably

A. Lignites

B. Bituminous coals

C. Semi-anthracites

D. Anthracites

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Fuels And Combustion MCQ Questions & Answers | Chemical Engineering

71. As time passes, the calorific value of stored coal

Answer & Solution

72. Cannel coal

Answer & Solution

73. In flue gas analysis by Orsat's apparatus, carbon monoxide is absorbed by

Answer & Solution

74. Low temperature carbonisation of coal produces

Answer & Solution

75. High temperature carbonisation of coal produces

Answer & Solution

76. Fuel combustion is never cent per cent efficient due to

Answer & Solution

77. Coal is pulverised before burning in large capacity boiler furnaces mainly to

Answer & Solution

78. Spontaneous combustion of coal on storage results due to

Answer & Solution

79. Coalification means the

Answer & Solution

80. Coking coals are invariably

Answer & Solution

Read More Section(Fuels and Combustion)

71.
As time passes, the calorific value of stored coal

72.
Cannel coal

73.
In flue gas analysis by Orsat's apparatus, carbon monoxide is absorbed by

74.
Low temperature carbonisation of coal produces

75.
High temperature carbonisation of coal produces

76.
Fuel combustion is never cent per cent efficient due to

77.
Coal is pulverised before burning in large capacity boiler furnaces mainly to

78.
Spontaneous combustion of coal on storage results due to

79.
Coalification means the

80.
Coking coals are invariably