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Fuels

Description: Free Online Exam Preparation and Practice Test Cover Fuel and Relevant Questions for JET Diploma and Other Entrance Exams
Number of Questions: 55
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Tags: Fuels JET Diploma Entrance Exams Coal and its Derivatives Fuel, Fuel Efficiency, Harmful Effects on Burning of Fuels. Natural Gas, a Natural Resource Fuel, Fuel Efficiency, Harmful Effects on Burning of Fuels Coal and Petroleum Coal - its Discovery and its Products Sets
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What percentage of moisture contents are found in lignite coal?

  1. 23%

  2. 33%

  3. 43%

  4. 53%


Correct Option: C
Explanation:

Lignite coal has a high moisture content in the range of 45% to 55%.

The chief constituent of biogas is ___________.

  1. methane

  2. hydrogen

  3. C2H5

  4. CO2


Correct Option: A

Biogas is prepared from

  1. petrol

  2. kerosene

  3. minerals

  4. biomass


Correct Option: D

Gas with the highest calorific value is __________.

  1. methane gas

  2. hydrogen gas

  3. ethane gas

  4. biogas


Correct Option: B

Unburned carbon particles are present in the ___________ zone of the flame.

  1. blue

  2. dark inner

  3. luminous

  4. non-luminous


Correct Option: C

Combustion is a process of __________.

  1. oxidation

  2. reduction

  3. neutralisation

  4. None of these


Correct Option: A

The gas obtained during destructive distillation of coal is _____________.

  1. water gas

  2. L..P.G

  3. producer gas

  4. coal gas


Correct Option: D
Explanation:

 The gas obtained during destructive distillation of coal is  coal gas .

Burning of kerosene oil is a type of combustion which is known as ____________.

  1. rapid combustion

  2. spontaneous combustion

  3. explosion

  4. None of these


Correct Option: A

Which of the following substances is the best fuel from the point of calorific value?

  1. Oxygen

  2. Hydrogen

  3. Nitrogen

  4. None of these


Correct Option: B
Explanation:

Calorific value of LPG = 55,000 kJ/kg   Calorific value of biogas = 35000-40000 kJ/kg Calorific value of hydrogen = 1,50,000 kJ/kg

Which of following characteristics does cooking gas have?

  1. High ignition temperature

  2. Excess oxygen

  3. High calorific value

  4. None of these


Correct Option: C
Explanation:

LPG (liquefied petroleum gas) used as a domestic fuel has a high calorific value. The ignition temperature of this fuel is reasonably low. It is a mixture of hydrocarbons.

The cooking gas used as a fuel for domestic purposes is

  1. water gas

  2. liquified petroleum gas (LPG)

  3. kerosene oil gas

  4. coal gas


Correct Option: B
Explanation:

The cooking gas used as a fuel for domestic purposes is liquified petroleum gas.

Which one of the following fuels is an example of primary fuel?

  1. Petroleum

  2. Coal gas

  3. Water gas

  4. Producer gas


Correct Option: A
Explanation:

Primary fuels or primary energy sources are dense sources of primary energy found as natural resources. Primary fuels are fuels that are found in nature and can be extracted, captured, cleaned or graded without any sort of energy conversion or transformation process.

What is the calorific value of wood?

  1. 33 kJ/g

  2. 17 kJ/g

  3. 3.7 kJ/g

  4. 1.7 kJ/g


Correct Option: B

Most common naturally occurring solid fuel used in villages is __________.

  1. coal

  2. wood

  3. paraffin

  4. coke


Correct Option: B

Which of the following varieties of coal has the highest carbon content?

  1. Peat

  2. Anthracite

  3. Lignite

  4. Bituminous


Correct Option: B
Explanation:

Anthracite is a hard, compact variety of coal that has a sub-metallic lustre. It has the highest carbon content, the fewest impurities and the highest calorific content of all types of coal. The carbon content is between 92.1% - 98% . In lignite, the carbon content is 25-35%. Bituminous contains 60-80% carbon. In peat, the carbon content is less than 60%.

Coal gas is used in _________.

  1. illumination

  2. disinfection

  3. deep freezing

  4. chemical preservation


Correct Option: A

Petroleum is a mixture of ___________.

  1. hydrocarbons

  2. oils

  3. coal and kerosene oil

  4. none of these


Correct Option: A
Explanation:

Petroleum is a mixture of hydrocarbons.

Petroleum is separated into different parts by the process of __________.

  1. nuclear fission

  2. nuclear fusion

  3. fractional distillation

  4. none of these


Correct Option: C
Explanation:

Petroleum is separated into different parts by the process of fractional distillation.

In homes, wood should be burnt for cooking food in special chulhas known as __________.

  1. smokeless chulha

  2. hearths

  3. ordinary chulhas

  4. none of these


Correct Option: A

What type of fuel is Liquefied Petroleum Gas (LPG)?

  1. Solid fuel

  2. Liquid fuel

  3. Gaseous fuel

  4. Not a fuel


Correct Option: C

How many parts does a candle flame have?

  1. one

  2. two

  3. three

  4. four


Correct Option: D

Bio-gas is prepared from ________.

  1. animal dung cakes

  2. wood wastes

  3. biogases

  4. animal dung


Correct Option: A

Coal gas is mixture of _________.

  1. H2 and CO

  2. H2,CH4 and CO

  3. CO2 and H2

  4. CH4 and H2


Correct Option: B

The gas obtained during destructive distillation of coal is __________.

  1. water gas

  2. coal gas

  3. natural gas

  4. petroleum gas


Correct Option: B
Explanation:

The gas obtained during destructive distillation of coal is coal gas. 

The refining of petroleum is called ____________.

  1. fractional distillation

  2. carbonisation

  3. destructive distillation

  4. none of these


Correct Option: A

Which of the following gas is produced on passing steam over red hot coke?

  1. producer gas

  2. coal gas

  3. L.P.G

  4. water gas


Correct Option: C

Bio-gas is better than the animal dungcakes as a fuel because _____________.

  1. it has higher calorific value

  2. it is easily available

  3. it burns easily

  4. it does not burn completely


Correct Option: A

Which fo the following types of coal is used in thermal plants?

  1. lignite

  2. anthracite

  3. bituminous

  4. peat


Correct Option: B

Which of the following fuels is a charasteristic of a good fuel?

  1. high calorific value

  2. low ignition temperature

  3. high oxygen content

  4. none of these


Correct Option: A

To check the leakage of L.P.G in cylinders, it is mixed with __________.

  1. CO

  2. CO2

  3. C2H5

  4. None of these


Correct Option: C

The main constituent of L.P.G. is __________.

  1. methane

  2. pentane

  3. propane

  4. butane


Correct Option: D

The most poisonous gas in absence of oxygen is ____________.

  1. CO2 + H2O

  2. CO

  3. N2

  4. CO2


Correct Option: B

Which of the following fuels has higher calorific value?

  1. dung

  2. methane

  3. coal

  4. wood


Correct Option: B

Percentage of methane in biogas is _________.

  1. 50%

  2. 65%

  3. 68%

  4. 70%


Correct Option: B

The gas obtained during destructive distillation of coal is ___________.

  1. water gas

  2. coal gas

  3. natural gas

  4. petroleum


Correct Option: B

Percentage of carbon in anthracite coal is ___________.

  1. 65%

  2. 75%

  3. 85%

  4. 96%


Correct Option: D
Explanation:

Percentage of carbon in anthracite coal is in between 92.1% and 98%.

A hydrocarbon is a compound of __________.

  1. carbon and oxygen

  2. carbon and nitrogen

  3. hydrogen and carbon

  4. none of these


Correct Option: B

The calorific value of hydrogen is __________.

  1. 32 kJ/g

  2. 77 kJ/g

  3. 150 kJ/g

  4. none of these


Correct Option: C

The temperature up to which crude oil is heated before feeding to fractionating column near the base is ____________.

  1. 250°C

  2. 300°C

  3. 400°C

  4. 600°C


Correct Option: D

Fuels are compounds of mostly __________.

  1. carbon and sulphur

  2. carbon and nitrogen

  3. carbon and hydrogen

  4. oxygen and hydrogen


Correct Option: C

The fuel used in the Rocket is called ___________.

  1. diesel

  2. propellant

  3. petroleum

  4. natural gas


Correct Option: B

Fractional distillation is used for refining petroleum because of hydrogen fractions which have ____________.

  1. different densities

  2. different boiling temperature

  3. different weights

  4. none of these


Correct Option: B
Explanation:

Fractional distillation is used for refining petroleum because of hydrogen fractions which have different boiling temperatures.

The first oil-well was drilled in the year __________.

  1. 1857

  2. 1859

  3. 1860

  4. 1869


Correct Option: D

Which of the following instruments is used to extinguish fire produced by oil?

  1. Water pipe

  2. CCI4

  3. Soda acid pipe

  4. Foam type


Correct Option: B

Energy stored in fossil fuels is obtained from __________.

  1. sun

  2. moon

  3. earth

  4. atmosphere


Correct Option: D

The main constituent of natural gas is _____________.

  1. C2H6 (ethane)

  2. C3H8 (butane)

  3. C4H10 (propane)

  4. CH4 (methane)


Correct Option: B

The process by which one type of petroleum oil is converted into another type is called ____________.

  1. sublimation

  2. cracking

  3. boiling

  4. synthesization


Correct Option: B
Explanation:

The process by which one type of petroleum oil is converted into another type is called cracking.

Burning of fossil fuels leads to ____________.

  1. water pollution

  2. air pollution

  3. soil pollution

  4. sound pollution


Correct Option: B

Green plants combine carbon dioxide and water in the presence of sun light to form food. This process is known as _________.

  1. photosynthesis

  2. respiration

  3. oxidation

  4. reduction


Correct Option: A

What typoe of substance coal-tar is?

  1. a compound

  2. an element

  3. a mixture of a number of carbon compounds

  4. none of these


Correct Option: C

The temperature at which a substance catches fire is called __________.

  1. boiling point

  2. oxidation

  3. ignition temperature

  4. none of these


Correct Option: A

Which of the following substances is a fossil fuel?

  1. Wood

  2. Coal

  3. Biogas

  4. Water gas


Correct Option: B
Explanation:

Coal was formed from the trees (fossils) that got buried under the layers of the earth during natural calamities like earthquake etc. Under geothermal conditions of high temperature and pressure, wood is converted into coal. 

Candle contains _________ zones in its flame.

  1. 3

  2. 4

  3. 5

  4. 6


Correct Option: A

Which of the following options is not a conventional source of energy?

  1. Cow-dung

  2. Wind

  3. Wood

  4. Agriculture wastes


Correct Option: B

Calorific value of L.P.G. is about __________.

  1. 17 megajoules per cubic metre

  2. 55 megajoules per cubic metre

  3. 94 megajoules per cubic metre

  4. None of these


Correct Option: C
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