Description : 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
Last Answer : (C) Contains mainly vitrain & clarain and is generally coking
Description : Which of the following petrographic constituents of coal is non-coking? (A) Vitrain (B) Clarain (C) Durain (D) Fussain
Last Answer : (D) Fussain
Description : A coal containing very high percentage of durain is called __________ coal. (A) Bright (B) Splint (C) Non-banded (D) Boghead
Last Answer : (B) Splint
Description : Which of the following is not a micro component present in coal? (A) Micrinite (B) Clarain (C) Fusinite (D) Liptinite
Last Answer : (B) Clarain
Description : Pick up the correct statement from the following: (A) According to the petrological characteristics, concrete aggregates are classified as heavy weight, normal weight and light weight (B) According to ... glassy, smooth, granular, rough, crystalline, honey combed and porous (D) All the above
Last Answer : Answer: Option D
Description : Which of the following is coking? (A) Vitrain (B) Fussain (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (A) Vitrain
Description : A material is called 'ductile', if it can be (A) Drawn into wires (B) Hammered to a thin sheet (C) Fractured without deformation (D) Made lustrous by heating it
Last Answer : (A) Drawn into wires
Description : Which of the following must be stored in silos and not in open yard? (A) Coke breeze (B) High V.M. bituminous coal (C) Sand (D) None of these
Last Answer : (B) High V.M. bituminous coal
Description : Which of the following is the most reactive (as regards the formation of CO + H2 from C + H2O)? (A) Blast furnace coke (B) Low temperature coke (C) Anthracite coal (D) Sub-bituminous coa
Last Answer : (B) Low temperature coke
Description : Calorific value of bituminous coal may be around __________ Kcal/kg. (A) 500 (B) 1500 (C) 6500 (D) 20000
Last Answer : (C) 6500
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
Description : Which of the following can be made into briquettes without the use of a binder? (A) Lignite (B) Bituminous coal (C) Anthracite coal (D) None of these
Last Answer : (A) Lignite
Description : Safe condition for storage of high V.M. bituminous coal is that (A) Height of the coal heap should be < 3 metres (B) Maximum 200 tons should be stored in a heap (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) and (B)
Description : 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%)
Last Answer : (D) High temperature coke (V.M < 0.5%)
Description : Which of the following has the highest calorific value? (A) Lignite (B) Sub-bituminous coal (C) Anthracite (D) Peat
Last Answer : (C) Anthracite
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
Description : Hard coke is manufactured from (A) Lignite (B) Bituminous coal (C) Semi-anthracite (D) Anthracite
Last Answer : (B) Bituminous coal
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
Description : Pick out the correct statement. (A) Oxygen content decreases from lignite to bituminous coal as the coalification increases (B) The less the oxygen content, better is the coal, as it reduces the calorific value (C ... capacity of coal increases and the caking power decreases (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Out of the following fuels, the difference between the net and gross calorific value is maximum in case of (A) Pitch (B) Fuel oil (C) Blast furnace gas (D) Bituminous coal
Last Answer : (B) Fuel oil
Description : Which is the most matured coal? (A) Lignite (B) Bituminous (C) Semi-anthracite (D) Anthracite
Last Answer : (D) Anthracite
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)
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
Description : Name the following: (a) A metal, which is preserved in kerosene. (b) A lustrous coloured non-metal. (c) A metal, which can melt while kept on palm. (d) A metal, which is a poor conductor of heat. -Chemistry
Last Answer : a) Sodium is preserved in kerosene. (b) Iodine is lustrous coloured non-metal. (c) Gallium. ‘ (d) Lead.
Description : Will the Lustrous Henna All Natural Hair Dye wash out?
Last Answer : The Lustrous Henna hair dye will wash out, but it will take several rinses for it to wash away completely.
Description : How long does the Lustrous Henna All Natural Hair Dye last?
Last Answer : The Lustrous Henna hair dye will last for probably five or six rinses before it washes away, so it depends on how often you shower.
Description : Which one of the following lists four type of coal, arranged in the increasing order of their carbon content? (a) Peat, Lignite, Bituminous, Anthracite (b) Peat, Bituminous, Lignite, Anthracite (c) Lignite, Peat, Bituminous, Anthracite (d) Peat, Anthracite, Lignite, Bituminous
Last Answer : Ans: (a)
Description : Which one among the following statements regarding India's coal is not correct? [CDS 2012] (a) 98 percent of reserves of coal in India belongs to Gondwana period (b) Unknown amount of coal ... Tertiary rocks (d) Gondwana coal is mainly found in the river valleys of Damodar, Mahanadi and Godavari
Last Answer : Ans: (c)
Description : Consider the following statements: 1. Gondwana coal is a laminated, bituminous coal. . 2. Gondwana coal is completely free from moisture, sulphur and phosphorus. Which of the statements given above is/are correct? [IAS 2008] (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2
Description : Which of the following is considered as superior quality of coal ? (A) Bituminous coal (B) Peat (C) Lignite (D) Coke.
Last Answer : Ans: A
Description : The highest grade and best quality coal is – (1) Lignite (2) Peat (3) Bituminous (4) Anthracite
Last Answer : (4) Anthracite Explanation: Anthracite is usually considered to be the highest grade of coal and is actually considered to be metamorphic. Compared to other coals it is much harder, has a glassy ... with few impurities. It is largely used for heating domestically as it burns with little smoke.
Description : Which one of the following is known as the 'brown coal'? (1) Anthracite (2) Bituminous (3) Coke (4) Lignite
Last Answer : (4) Lignite Explanation: Lignite, often referred to as brown coal, is a soft brown fuel with characteristics that put it somewhere between coal and peat. It is considered the lowest rank of coal. It has ... 66%, and an ash content ranging from 6% to 19% compared with 6% to 12% for bituminous coal.
Description : Which one of the following is known as the ‘brown coal’? (1) Anthracite (2) Bituminous (3) Coke (4) Lignite
Last Answer : (4) Lignite Explanation: Lignite, often referred to as brown coal, is a soft brown fuel with characteristics that put it somewhere between coal and peat. It is considered the lowest rank of coal. It has a carbon content of around 2530%.
Description : Which is the highest quality of hard coal? (1) Anthracite (2) Bituminous (3) Lignite (4) Peat
Last Answer : (1) Anthracite Explanation: Anthracite is the highest rank of coal. It is the most metamorphosed type of coal, in which the carbon content is between 92.1% and 98%. Anthracite coal generally has ... heating value per ton on a mineralmatter-free basis. Anthracite is often referred to as hard coal.
Description : Highest percentage of carbon is found in which form of coal? (1) Anthracite (2) Bituminous (3) Peat (4) Lignite
Last Answer : (1) Anthracite Explanation: Anthracite is the highest rank of coal since it has a carbon content of over 87% on a dry ash-free basis. Anthracite coal generally has the highest heating value per ton on a mineral-matter-free basis. It has a bright luster and breaks with a semi-conchoidal. fracture.
Description : Which one of the following is not coal variety? (1) Lignite (2) Bituminous (3) Dolomite (4) Peat
Last Answer : (3) Dolomite Explanation: Dolomite is a common rockforming mineral. It is a calcium magnesium carbonate with a chemical composition of CaMg(CO3)2. It is the primary component of the sedimentary ... known as dolomitic marble. Dolomite is used in the Pidgeon process for the production of magnesium.
Description : Which of the following type of coal has the lowest proportion of volatile matter? (1) Lignite (2) Peat (3) Bituminous (4) Anthracite
Last Answer : (4) Anthracite Explanation: Anthracite has the lowest proportion of volatile matter. Volatile matter in coal refers to the components of coal, except for moisture, which are liberated at ... hydrocarbons and some sulfur. The volatile matter of coal is determined under rigidly controlled standards.
Description : Which one of the following types of coal contains a higher percentage of carbon than the rest? (1) Bituminous coal (2) Lignite (3) Peat (4) Anthracite
Last Answer : (4) Anthracite Explanation: Anthracite is thecoal that gives the most energy and the least pollution (it produces lots of CO2). It is the ideal fuel for power station.
Description : Which of the following is considered as superior quality of coal? (A) Bituminous coal (B) Peat (C) Lignite (D) Coke.
Last Answer : Bituminous coal
Description : Producer gas is obtained by A. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast B. carbonisation of bituminous coal C. passing steam over incandescent coke D. passing air and a large amount of steam over waste coal at about 650°C
Last Answer : Answer: A
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
Description : Of the following states, the principal bituminous coal producing state in the United States is: w) Tennessee x) Illinois y) Pennsylvania z) West Virginia
Last Answer : ANSWER: Z -- WEST VIRGINIA
Description : Which coal is considered a metamorphic rock? w) anthracite coal x) bituminous coal y) lignite coal z) all of these
Last Answer : ANSWER: W -- ANTHRACITE
Description : In terms of quality, what is the highest ranked coal? w) peat x) bituminous y) anthracite z) lignite
Last Answer : ANSWER: Y -- ANTHRACITE
Description : Among the following, the substance that is considered to be the earliest stage in coal formation is: w) sub-bituminous x) bituminous y) anthracite z) lignite
Last Answer : ANSWER: Z -- LIGNITE
Last Answer : Anthracite
Last Answer : Dolomite
Description : Which one of the following is known as the ‘brown coal’ ? (1) Anthracite (2) Bituminous (3) Coke (4) Lignite
Last Answer : Lignite