Bright coal (A) Contains more than 90% durain (B) Contains more than 90% fussain (C) Contains mainly vitrain & clarain and is generally coking (D) Is non-coking

Bright coal
(A) Contains more than 90% durain
(B) Contains more than 90% fussain
(C) Contains mainly vitrain & clarain and is generally coking
(D) Is non-coking
by

1 Answer

Answer :

(C) Contains mainly vitrain & clarain and is generally coking
by

Related questions

Which of the following petrographic constituents of coal is non-coking? (A) Vitrain (B) Clarain (C) Durain (D) Fussain

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Last Answer : (D) Fussain

Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal? (A) Vitrain (B) Clarain (C) Durain

Description : Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal? (A) Vitrain (B) Clarain (C) Durain

Last Answer : (A) Vitrain

Which of the following is coking? (A) Vitrain (B) Fussain (C) Both (A) & (B) (D) Neither (A) nor (B)

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Last Answer : (A) Vitrain

Fussain (A) Is friable, charcoal like substance(B) Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal (C) Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation (D) All (A), (B) and (C)

Description : Fussain (A) Is friable, charcoal like substance (B) Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal (C) Is non-coking, but when blended with highly coking ... its swelling and produces high strength coke on carbonisation (D) All (A), (B) and (C)

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A coal containing very high percentage of durain is called __________ coal. (A) Bright (B) Splint (C) Non-banded (D) Boghead

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Which of the following is not a micro component present in coal? (A) Micrinite (B) Clarain (C) Fusinite (D) Liptinite

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Bituminous coal (A) Ignites less easily than anthracite (B) Is generally coking (C) Burns with smoky yellow flame (D) Both (B) and (C)

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Which of the following fuels is the best for burning on chain grate stoker? (A) Non-caking coal (B) Caking coal (C) Coking coal (D) Pulverised coal

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Washing of coal (A) Reduces its ash & sulphur content (B) Improves its coking properties (C) Increase the fusion point of its ash by removing chlorine compounds (D) All (A), (B) and (C)

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Last Answer : (D) All (A), (B) and (C)

Softening temperature of coal ash is a measure of the __________ of coal. (A) Caking tendency (B) Coking tendency (C) Clinkering tendency (D) Size stability

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Presence of free moisture in coal during its high temperature carbonisation (A) Reduces the coking time (B) Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls (C) Increases the loss of fine coal dust from the ovens when charging (D) None of these

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