Multiple Choice Questions (MCQ) with Answers on Internal Combustion Engine Fuels and Combustion

Multiple Choice Questions (MCQ) with Answers on Internal Combustion Engine Fuels and Combustion

 

1-The following is the desirable property (ies) of good Internal Combustion engine fuel

  1. High energy content per unit quantity of fuel
  2. Free from fire hazards
  3. Low toxicity
  4. All of the above

(Ans: d)

 

2-The solid fuels can be used in Internal combustion engine only after their

  1. Solidification
  2. Liquefaction
  3. Gasification
  4. All of the above

(Ans: c)

 

3-The major constituent of natural gas is

  1. Methane
  2. Ethane
  3. Propane
  4. Butane

(Ans: a)

 

4-Which of the following gas (es) is used as fuel in internal combustion engine?

  1. Liquefied petroleum gas (LPG)
  2. Blast furnace gas
  3. Coke oven gas
  4. All of the above

(Ans: d)

 

5-The following is not normal paraffin.

  1. Methane
  2. n-butane
  3. n-octane
  4. Iso-octane

(Ans: d)

 

6-Decomposition of higher hydrocarbon molecules into lower hydrocarbons having lower boiling temperatures is known as

  1. Polymerization
  2. Hydrogeneration
  3. Isomerization
  4. Cracking

(Ans: d)

 

7-In order to have good engine performance

  1. The fuel should have low boiling temperature for lower warm up period
  2. The percentage of volume evaporated at low temperatures should be small
  3. A rich mixture of air-fuel ratio of 12 to 13:1 is considered to be suitable for easy starting of the engine
  4. All of the above

(And: d)

 

8-The antiknock property of the fuel depends on its

  1. Self-ignition temperature
  2. Molecular structure
  3. Chemical composition
  4. All of the above

(Ans: d)

 

9-Iso-octane and n-heptane has assigned a rating of

  1. 0, 100
  2. 50, 50
  3. 100, 0
  4. 20, 80

(Ans: c)

 

10-Compression ratio at which the fuel can be used in an engine without detonation on a specific test engine under standard operating conditions is known as

  1. Highest useful compression ratio
  2. Lowest useful compression ratio
  3. Optimal useful compression ratio
  4. Minimal useful compression ratio

(Ans: a)

 

11-The following is used for rating for Compression ignition engines.

  1. Octane number
  2. Cetane number
  3. Butane number
  4. All of the above

(Ans: b)

 

12-The ratio of mass per unit volume of oil to the mass of water to the same volume at standard temperature of 15 degree is known as

  1. Mass density of diesel oil
  2. Specific gravity of diesel oil
  3. Specific density of diesel oil
  4. None of the above

(Ans: b)

 

13-The following is (are) used as additives for Compressed Ignition engine fuels.

  1. Amyl Nitrate
  2. Ethyl Thionitite
  3. Amyl Nitrite
  4. All of the above

(Ans: d)

 

14-A mixture of theoretical air and fuel for complete combustion of fuel is called

  1. Rich mixture
  2. Lean mixture
  3. Air-fuel mixture
  4. Stoichiometric mixture

(Ans: d)

 

15-Mixture strength is defined as the ratio of

  1. Stoichiometric Air-fuel ratio / Actual Air-fuel ratio
  2. Stoichiometric Air-fuel ratio / Theoretical Air-fuel ratio
  3. Actual Air-fuel ratio / Stoichiometric Air-fuel ratio
  4. Theoretical Air-fuel ratio / Stoichiometric Air-fuel ratio

(Ans: a)

 

16-The difference of actual air supplied and the stoichiometric air required for complete combustion of fuel is called

  1. Excess air
  2. Theoretical air
  3. Combustion air
  4. Dry air

(Ans: a)

 

17-The following method is used for analysis of combustion products (flue gases)?

  1. Non Dispersive Infra-Red Analyzer
  2. Flame Ionization Detector
  3. Flue Gas Analyzer for Boiler Flue Gases
  4. All of the above

(Ans: d)

 

18-The heat energy released is measured with the help of

  1. Energy meter
  2. Thermometer
  3. Calorimeter
  4. Anemometer

(Ans: c)

 

19-To measure the energy released by fuels by cooling it, the standard temperature (in degree) and pressure (atm) are taken as

  1. 0 degree, 1 atm
  2. 25 degree, 1 atm
  3. 0 degree, 2 atm
  4. 25 degree, 2 atm

(Ans: b)

 

20-Bomb calorimeter is used to determine the calorific value of the following fuels

  1. Solid fuels
  2. Liquid fuels
  3. Both ‘a’ and ‘b’
  4. None of the above

(Ans: c)