Coking coals are invariably (A) Lignites (B) Bituminous coals (C) Semi-anthracites (D) Anthracites

Coking coals are invariably
(A) Lignites
(B) Bituminous coals
(C) Semi-anthracites
(D) Anthracites
by

1 Answer

Answer :

(B) Bituminous coals
by

Related questions

In Lurgi coal gasifier, (A) Coking coals cannot be used (B) Low carbon conversion efficiency is achieved (C) Entrainment of solids is higher (D) Larger quantity of coal can be processed

Description : In Lurgi coal gasifier, (A) Coking coals cannot be used (B) Low carbon conversion efficiency is achieved (C) Entrainment of solids is higher (D) Larger quantity of coal can be processed

Last Answer : (D) Larger quantity of coal can be processed

Pick out the wrong statement. (A) Indian coals on an average contain 25-30% ash as against 10-12% ash in imported coking coal (B) Ammonia is recovered in the form of ammonium sulphate in direct process of by-product recovery (C) A high swelling index number of coking coal indicates poor caking properties of coal (D) Wash oil is used for scrubbing Benzol from coke oven gas

Description : Pick out the wrong statement. (A) Indian coals on an average contain 25-30% ash as against 10-12% ash in imported coking coal (B) Ammonia is recovered in the form of ammonium sulphate in direct ... indicates poor caking properties of coal (D) Wash oil is used for scrubbing Benzol from coke oven gas

Last Answer : (C) A high swelling index number of coking coal indicates poor caking properties of coal

Pick out the wrong statement. (A) Cokes of high reactivity are obtained from weakly coking coals (B) Cokes of high reactivity are obtained from strongly coking coals (C) Reactivity of coke is inversely proportional to its absolute density (D) Abrasion index of the coke is a measure of its hardness

Description : Pick out the wrong statement. (A) Cokes of high reactivity are obtained from weakly coking coals (B) Cokes of high reactivity are obtained from strongly coking coals (C) Reactivity of coke is inversely proportional to its absolute density (D) Abrasion index of the coke is a measure of its hardness

Last Answer : (B) Cokes of high reactivity are obtained from strongly coking coals

Very __________ coals are completely devoid of cokability i.e., it is non-coking. (A) Young (B) Mature (C) Both 'a' & 'b' (D) Neither 'a' nor 'b

Description : Very __________ coals are completely devoid of cokability i.e., it is non-coking. (A) Young (B) Mature (C) Both 'a' & 'b' (D) Neither 'a' nor 'b

Last Answer : (C) Both 'a' & 'b'

In the Lurgi coal gasifier (A) Coking coals cannot be used (B) Low carbon conversion efficiency is achieved (C) Entrainment of solids is higher (D) Large quantity of coal can be processed

Description : In the Lurgi coal gasifier (A) Coking coals cannot be used (B) Low carbon conversion efficiency is achieved (C) Entrainment of solids is higher (D) Large quantity of coal can be processed

Last Answer : (D) Large quantity of coal can be processed

Which of the following coals has the highest calorific value? (A) Lignite (B) Sub-bituminous (C) Anthracite (D) Peat

Description : Which of the following coals has the highest calorific value? (A) Lignite (B) Sub-bituminous (C) Anthracite (D) Peat

Last Answer : (C) Anthracite

Anthracite coal (A) Contains more volatile matter than bituminous coal (B) Ignites more easily than bituminous coal (C) Is essentially a coking coal (D) Burns with short, bluish, yellow-tipped flame producing very little smoke

Description : Anthracite coal (A) Contains more volatile matter than bituminous coal (B) Ignites more easily than bituminous coal (C) Is essentially a coking coal (D) Burns with short, bluish, yellow-tipped flame producing very little smoke

Last Answer : (D) Burns with short, bluish, yellow-tipped flame producing very little smoke

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

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

Last Answer : (D) Both (B) and (C)

The fuel mostly used in steam boilers is  A. brown coal  B. peat  C. coking bituminous coal  D. non-coking bituminous coal

Description : The fuel mostly used in steam boilers is  A. brown coal  B. peat  C. coking bituminous coal  D. non-coking bituminous coal

Last Answer : Answer: D

The most matured coal out of the following is(A) Lignite (B) Semi-anthracite (C) Sub-bituminous (D) Bituminous

Description : The most matured coal out of the following is (A) Lignite (B) Semi-anthracite (C) Sub-bituminous (D) Bituminous

Last Answer : (B) Semi-anthracite

Hard coke is manufactured from (A) Lignite (B) Bituminous coal (C) Semi-anthracite (D) Anthracite

Description : Hard coke is manufactured from (A) Lignite (B) Bituminous coal (C) Semi-anthracite (D) Anthracite

Last Answer : (B) Bituminous coal

Which will have the least volatile matter and hence will be the most difficult to ignite? (A) Bituminous coal (B) Coke (C) Semi-bituminous coal (D) Anthracite

Description : Which will have the least volatile matter and hence will be the most difficult to ignite? (A) Bituminous coal (B) Coke (C) Semi-bituminous coal (D) Anthracite

Last Answer : (B) Coke

Which is the most matured coal? (A) Lignite (B) Bituminous (C) Semi-anthracite (D) Anthracite

Description : Which is the most matured coal? (A) Lignite (B) Bituminous (C) Semi-anthracite (D) Anthracite

Last Answer : (D) Anthracite

Which of the following would require least amount of secondary air for combustion? (A) Coke breeze containing 25% ash and 2% volatile matter (B) Anthracite containing 10% volatile matter and 8% ash(C) Bituminous coal containing 20% ash and 25% volatile matter(D) Semi-bituminous coal containing 25% ash and 20% volatile matter

Description : Which of the following would require least amount of secondary air for combustion? (A) Coke breeze containing 25% ash and 2% volatile matter (B) Anthracite containing 10% volatile matter and 8% ash ... ash and 25% volatile matter (D) Semi-bituminous coal containing 25% ash and 20% volatile matter

Last Answer : (A) Coke breeze containing 25% ash and 2% volatile matter

Assam (India) coals suffers mainly from the disadvantage of high __________ content. (A) Ash (B) Volatile matter (C) Sulphur (4-6%)

Description : Assam (India) coals suffers mainly from the disadvantage of high __________ content. (A) Ash (B) Volatile matter (C) Sulphur (4-6%)

Last Answer : (C) Sulphur (4-6%)

Ratio of primary air to secondary air increases with increase in the rank of coal, because the (A) High rank coals have higher amount of volatile matter (B) Ratio of fixed carbon to volatile matter increases (C) Oxygen content progressively decreases (D) Calorific value of the coal increases

Description : Ratio of primary air to secondary air increases with increase in the rank of coal, because the (A) High rank coals have higher amount of volatile matter (B) Ratio of fixed carbon to volatile matter increases (C) Oxygen content progressively decreases (D) Calorific value of the coal increases

Last Answer : (B) Ratio of fixed carbon to volatile matter increases

High ash coals (A) Are soft & friable (poor strength and size stability) (B) Require longer time of carbonisation as ash offers resistance to heat transfer (C) Produce larger quantity of coke oven gas (D) None of these

Description : High ash coals (A) Are soft & friable (poor strength and size stability) (B) Require longer time of carbonisation as ash offers resistance to heat transfer (C) Produce larger quantity of coke oven gas (D) None of these

Last Answer : (A) Are soft & friable (poor strength and size stability)

Coals used for the generation of producer gas should have (A) High caking index (B) Low fusion point of ash (C) High volatile matter content (D) Very low ash content (8-10%)

Description : Coals used for the generation of producer gas should have (A) High caking index (B) Low fusion point of ash (C) High volatile matter content (D) Very low ash content (8-10%)

Last Answer : (C) High volatile matter content

Pick out the wrong statement: (A) Carburetted water gas is also called blue gas (B) Coals are divided in four species according to their carbon content in Seylor's classification (C) Carbonisation time in a by-product coke oven is about 16 hours (D) Gross and net calorific value of a fuel is the same, if it does not contain hydrogen or hydrocarbons

Description : Pick out the wrong statement: (A) Carburetted water gas is also called blue gas (B) Coals are divided in four species according to their carbon content in Seylor's classification (C) Carbonisation time ... and net calorific value of a fuel is the same, if it does not contain hydrogen or hydrocarbons

Last Answer : (A) Carburetted water gas is also called blue gas

Fat coals' are those coals which have very high (A) Caking capacity (B) Volatile matter content (C) Fusion point of its ash (D) Inherent moisture conten

Description : Fat coals' are those coals which have very high (A) Caking capacity (B) Volatile matter content (C) Fusion point of its ash (D) Inherent moisture conten

Last Answer : (A) Caking capacity

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Description : Pick out the wrong statement. (A) Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal (B) Low grade coal can be used, but generally high volatile ... and atmosphere (oxidising or reducing) is easily possible with pulverised fuel firing (D) None of these

Last Answer : (D) None of these

. Highly caking coals (A) Produce weak coke (B) Produce strong coke (C) May damage the coke oven walls during carbonisation (D) Both (B) and (C)

Description : . Highly caking coals (A) Produce weak coke (B) Produce strong coke (C) May damage the coke oven walls during carbonisation (D) Both (B) and (C)

Last Answer : (D) Both (B) and (C)

Cannel coal and boghead coal are the examples of (A) Humic coals (B) Liptobiolites (C) Sapropelic coals (D) None of these

Description : Cannel coal and boghead coal are the examples of (A) Humic coals (B) Liptobiolites (C) Sapropelic coals (D) None of these

Last Answer : (C) Sapropelic coals

Wobbe index' is a characteristic of (A) Solid fuels (B) Gaseous fuels (C) Liquid fuels (D) Fat coals

Description : Wobbe index' is a characteristic of (A) Solid fuels (B) Gaseous fuels (C) Liquid fuels (D) Fat coals

Last Answer : (B) Gaseous fuels

What Is The Difference Between Organic Material From Which Coals Forms And The Organic Material From Which Petroleum And Natural Gas Forms?

Description : What Is The Difference Between Organic Material From Which Coals Forms And The Organic Material From Which Petroleum And Natural Gas Forms?

Last Answer : There is no difference. They were all formed from plant and animal life laid down and covered and compressed over millions of years ago.

What kind of coals are best to use when grilling?

Description : What kind of coals are best to use when grilling?

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Proximity analysis of coal provides data for a first, general assessment of a coal’s quality and type. What elements it reports ?

Description : Proximity analysis of coal provides data for a first, general assessment of a coal’s quality and type. What elements it reports ?

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Aliens in alien invasion movies are invariably stupid, otherwise there is no way they would be defeated. Which alien race from these movies is, in your opinion, the LEAST stupid?

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When you start a project, does one thing invariably lead to another?

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Why is that my laptop (and my previous laptops) have always had power inputs on the left side and it seems that over the years invariably whatever outlet I need to plug into is on the right ?

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A recently purchased implement for brushing away floor dirt invariably effaces the dirt most efficiently. What is the proverb? -Riddles

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Bronze coins of Nataraja cast during the Chola period invariably show the deity with howmany hands? -Do You Know?

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A sample of `._(19)^(40)K` contains invariably `._(18)^(40)Ar`. This is because `._(19)^(40)K` has tendency to undergo:

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People with Down's syndrome invariably affected by: (1) Huntington's disease (2) Alzheimer's disease (3) Meningitis (4) Brain haemorrhage

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The chemical component that is invariably found in all viruses is (1) proteins (2) lipids (3) DNA (4) RNA

Description : The chemical component that is invariably found in all viruses is (1) proteins (2) lipids (3) DNA (4) RNA

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Bronze coins of Nataraja cast during the Chola period invariably show the deity with howmany hands?

Description : Bronze coins of Nataraja cast during the Chola period invariably show the deity with howmany hands?

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The following irregularities occur, they must invariably be noted in the Record officer’s daily report (a) Non-attendance or late attendance of a Sorting Assistant on the attendance day at the Record (b) Negligence on the part of a Sorting Assistant, as evidence by the number of complaints received against him, or by careless preparation of work-papers; (c) loss of Sorting Assistant’s metal token; or sorting list (d) loss of, or damage to any article supplied to the set; (e) All the above

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Last Answer : (e) All the above

The misconnection between air services should invariably be reported by Record Officer to a) DG of Posts b) The head of the division c) The Head of the circle by first post d) None of these

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Cables for 220 kV lines are invariably (a) mica insulated (b) paper insulated (c) compressed oil or compressed gas insulated (d) rubber insulated (e) none of the above

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Which of the following statement is FALSE regarding Krukenberg tumors Options: 1) They are primary ovarian carcinomas that always secondarily metastasize to Gastrointestinal organs 2) They are almost invariably bilateral 3) There is no infiltration through the capsule 4) They are freely movable in pelvis

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10. “Cleistogamous flowers are invariably autogamous because” (a) These flowers do not open at all. (b) There is no chance of cross – pollen landing on the stigma. (c) These flowers have exposed anthers and stigma. (d) These flowers are wind pollinated.

Description : 10. “Cleistogamous flowers are invariably autogamous because” (a) These flowers do not open at all. (b) There is no chance of cross – pollen landing on the stigma. (c) These flowers have exposed anthers and stigma. (d) These flowers are wind pollinated.

Last Answer : (a) These flowers do not open at all.

Which one of the following is not a software myth? (A) Once we write the program and get it to work, our job is done. (B) Project requirements continually change, but change can be easily accommodated because software is flexible. (C) If we get behind schedule, we can add more programmers and catch up. (D) If an organization does not understand how to control software projects internally, it will invariably struggle when it outsources software projects.

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The chemical component that is invariably found in all viruses is : (1) proteins (2) lipids (3) DNA (4) RNA

Description : The chemical component that is invariably found in all viruses is : (1) proteins (2) lipids (3) DNA (4) RNA

Last Answer : proteins

People with Down’s syndrome invariably affected by: (1) Huntington’s disease (2) Alzheimer’s disease (3) Meningitis (4) Brain haemorrhage

Description : People with Down’s syndrome invariably affected by: (1) Huntington’s disease (2) Alzheimer’s disease (3) Meningitis (4) Brain haemorrhage

Last Answer : Alzheimer’s disease 

In AC. circuits, laminated iron is invariably used in order to?

Description : In AC. circuits, laminated iron is invariably used in order to?

Last Answer : In AC. circuits, laminated iron is invariably used in order to reduce eddy current loss.

_______ is invariably used as base load plant.

Last Answer : Nuclear power plant is invariably used as base load plant.

Large capacity generators are invariably?

Last Answer : Large capacity generators are invariably hydrogen cooled.