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Fuel

41 MCQ questions with answers and explanations · page 2 of 2

Test yourself▶ 25 question test

Q26. The combustion process that takes place without any external heat is called

  1. Arapid combustion
  2. Bslow combustion
  3. Cspontaneous combustion
  4. Dexplosion
Show answer & explanation

Answer: C) spontaneous combustion

Q27. This process of combustion in which heat and light are produced in a short time is called

  1. Arapid combustion
  2. Bslow combustion
  3. Cspontaneous combustion
  4. Dexplosion
Show answer & explanation

Answer: A) rapid combustion

Q28. The explosion of a firecracker is an example of

  1. Aevaporation
  2. Bcombustion
  3. Cprecipitation
  4. Ddecomposition
Show answer & explanation

Answer: B) combustion

Q29. With what does the sodium bicarbonate solution filled in fire extinguishers react to form carbon dioxide?

  1. Acarbolic acid
  2. BGandhakaamd
  3. Cacetic acid
  4. Dnitric acid
Show answer & explanation

Answer: B) Gandhakaamd

Q30. Why is sodium bicarbonate used as a fire extinguisher?

  1. ABy receiving heat from the fire, it produces CO² gas.
  2. BIt produces CO gas by absorbing heat from the fire.
  3. CBy receiving heat from the fire, it produces O2 gas.
  4. DIt produces water by receiving heat from the fire.
Show answer & explanation

Answer: A) By receiving heat from the fire, it produces CO² gas.

Q31. Which one of the following gases is a combustion promoter?

  1. Ahydrogen
  2. Bnitrogen
  3. CCO²
  4. Doxygen
Show answer & explanation

Answer: D) oxygen

Q32. concentrated solution of which of the following is kept in a fire extinguisher along with concentrated sulphuric acid kept in a bottle?

  1. Acalcium carbonate
  2. Bsodium chloride
  3. Csodium bicarbonate
  4. Dsodium sulphate
Show answer & explanation

Answer: C) sodium bicarbonate

Q33. In a simple fire extinguisher, CO is produced by the reaction of:

  1. ALimestone and dilute sulphuric acid
  2. BMarble and dilute salt acid
  3. Csodium bicarbonate and dilute coagulation
  4. DRatio of sodium carbonate and dilute salt
Show answer & explanation

Answer: C) sodium bicarbonate and dilute coagulation

Q34. Which gas is used in fire fighting?

  1. Ahelium
  2. BCO²
  3. CCO
  4. DO²
Show answer & explanation

Answer: B) CO²

Q35. Water cannot extinguish burning petrol because

  1. AA flammable chemical is produced when petrol and water are mixed.
  2. BBurning petrol instantly turns water into steam.
  3. CPetrol floats on water due to its relatively low density.
  4. DOn contact with burning petrol, water releases oxygen, which helps in burning.
Show answer & explanation

Answer: C) Petrol floats on water due to its relatively low density.

Q36. Which of the following is not a fuel element?

  1. AUranium
  2. BThorium
  3. CRadium
  4. Dhelium
Show answer & explanation

Answer: D) helium

Q37. Which of the following is not a fossil fuel?

  1. ACoal
  2. Bpetroleum
  3. Cnitrogen
  4. Dwater gas
Show answer & explanation

Answer: C) nitrogen

Q38. Which of the following is the best fuel in terms of energy released per gram of fuel?

  1. Ahydrogen
  2. Bmethane
  3. CEthanol
  4. Dbutane
Show answer & explanation

Answer: A) hydrogen

Q39. Producer gas is a mixture of—

  1. ACO+N²
  2. BCO² + N²
  3. CCO² + H²+ N²
  4. DCO²+ H²
Show answer & explanation

Answer: A) CO+N²

Q40. Which of the following can be used as propellant or fuel in rockets?

  1. ALiquid Hydrogen + Liquid Nitrogen
  2. BLiquid Oxygen + Liquid Argan
  3. Cliquid nitrogen + liquid oxygen
  4. Dliquid hydrogen + liquid oxygen
Show answer & explanation

Answer: D) liquid hydrogen + liquid oxygen

Q41. Which of the following fossil fuels is the cleanest fuel?

  1. ACoal
  2. Bpetrol
  3. Cnatural gas
  4. Ddiesel
Show answer & explanation

Answer: C) natural gas

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