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 : 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 : 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 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.
Last Answer : Anthracite
Description : Which one of the following is known as the ‘brown coal’ ? (1) Anthracite (2) Bituminous (3) Coke (4) Lignite
Last Answer : Lignite
Description : Which of the following type of coal has the lowest proportion of volatile matter ? (1) Lignite (2) Peat (3) Bituminous (4) Anthracite
Description : Which of the following coals has the highest calorific value? (A) Lignite (B) Sub-bituminous (C) Anthracite (D) Peat
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 : 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 : 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 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 : 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 : Hard coke is manufactured from (A) Lignite (B) Bituminous coal (C) Semi-anthracite (D) Anthracite
Last Answer : (B) Bituminous coal
Description : Which is the most matured coal? (A) Lignite (B) Bituminous (C) Semi-anthracite (D) Anthracite
Last Answer : (D) Anthracite
Description : The highest grade and best quality coal is (1) Lignite (2) Peat (3) Bituminous (4) Anthracite
Description : Which among the following coal contains 90 per cent of carbon? (1) Anthracite (2) Bitumen (3) Lignite (4) Peat
Last Answer : (1) Anthracite Explanation: Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, ... elements, chiefly hydrogen, sulfur, oxygen, and nitrogen. Anthracite contains 90 per cent of carbon.
Description : Which among the following types of coal produces most heat per unit? (1) Coal (2) Lignite (3) Anthracite (4) Pit
Last Answer : (3) Anthracite Explanation: The heat content of anthracite ranges from 22 to 28 million Btu per short ton (26 to 33 MJ/kg) on a moist, mineral-matter-free basis. Anthracite ("coal-like" ... , and the highest calorific content of all types of coals, which also include bituminous coal and lignite.
Description : Which among the following types of coal produces most heat per unit ? (1) Coal (2) Lignite (3) Anthracite (4) Pit
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 : 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 : Which variety of coal contains recognizable traces of the original plant material? (1) Anthracite (2) Lignite (3) Peat (4) Bitumen
Last Answer : (3) Peat Explanation: Peat contains recognizable traces of the original plant material. Initially the peat is converted into lignite or 'brown coal' - these are coal-types with low organic maturity. In ... , lignite is quite soft and its colour can range from dark black to various shades of brown.
Description : Which variety of coal contains recognisable traces of the original plant material ? (1) Anthracite (2) Lignite (3) Peat (4) Bitumen
Last Answer : Peat
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.
Last Answer : Dolomite
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 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 : 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 : 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 variety of coal in which the deposit contains recognizable traces of the original plant material is------? A. bitumen B. anthracite C. lignite D. peat (Answer)
Last Answer : D. peat (Answer)
Description : 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 coa
Last Answer : (A) Process of conversion of lignite into anthracite
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 : 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 : Ignition temperature decreases progressively from anthracite to lignite, because (A) Volatile matter content increases (B) Carbon content decreases (C) Moisture content increases (D) Ash content increases
Last Answer : (A) Volatile matter content increases
Description : Which of the following is considered a renewable resource? w) Coal fired power plant x) Hydroelectric dam y) Combustion turbine facility z) Nuclear fission power plant
Last Answer : ANSWER: X -- HYDROELECTRIC DAM
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 : The fossil archaeopteryx is the earliest known example of: w) mammal x) fish y) bird z) snake
Last Answer : ANSWER: Y -- BIRD
Description : The earliest experiments on chromosome theory and inheritance were developed by? w) Gregor Mendel x) Jonas Salk y) Charles Sternak z) Robert Oppenheimer
Last Answer : ANSWER: W -- GREGOR MENDEL
Description : Among sources of power India has largest of (a) coal (b) oil (c) natural gas (d) lignite
Description : High grade coal is mainly which of the following? w) methane x) propane y) a mixture of hydrocarbons z) anthracene
Last Answer : ANSWER: Y -- A MIXTURE OF HYDROCARBONS