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4. Combustion and Flame(8)

Test your knowledge of combustion and flame concepts including ignition temperatures, types of combustion, fire safety methods, and flame characteristics.

19 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Ignition temperature of which of the following will be highest ?

  1. dry paper cup
  2. petrol
  3. wet paper cup
  4. phosphorus
Question 2 Multiple Choice (Single Answer)

Combustion of coal releases particulate matter that may lead to :

  1. asthma
  2. goitre
  3. arthritis
  4. bone cancer
Question 3 Multiple Choice (Single Answer)

If we want to fight fire we should do :-

  1. We should cool down combustible substance below ignition temperature
  2. We should cut off the supply of oxygen
  3. We should remove combustible substance
  4. We should remove combustible substance
Question 4 Multiple Choice (Single Answer)

A substance that has relatively low ignition temperature exhibits

  1. Rapid combustion
  2. Spontaneous combustion
  3. Incomplete oxidation
  4. Slow combustion
Question 5 Multiple Choice (Single Answer)

A carbon dioxide fire extinguisher cylinder is filled with

  1. Liquid carbon dioxide
  2. Solid carbon dioxide
  3. Gel based carbon dioxide
  4. Gaseous carbon dioxide
Question 6 Multiple Choice (Single Answer)

Within a living cell, food is burned to produce energy through

  1. Combustion
  2. Respiration
  3. Gaseous exchange
  4. Addition of carbon dioxide and water
Question 7 Multiple Choice (Single Answer)

Sunil wet a paper cup with water and then heated it over the flame

  1. Does not burn
  2. Burns immediately
  3. Explosion occurs
  4. None of the above
Question 8 Multiple Choice (Single Answer)

A person after fire casualty is wrapped with blanket to

  1. To increase the ignition temperature of body
  2. To cut the supply of carbon dioxide
  3. To cut oxygen supply
  4. To cut the supply of combustible substance
Question 9 Multiple Choice (Single Answer)

It is due to complete combustion, that fuel burns with a

  1. Blue flame
  2. Yellow flame
  3. Black flame
  4. Red flame
Question 10 Multiple Choice (Single Answer)

Gas necessary for combustion is

  1. Oxygen
  2. Nitrogen
  3. Hydrogen
  4. Sulphur dioxide
Question 11 Multiple Choice (Single Answer)

Combustion is a _____ chemical reaction

  1. Volatile
  2. Endothermic
  3. Exothermic
  4. None
Question 12 Multiple Choice (Single Answer)

Substance that does not burn in air is

  1. Wood
  2. Diesel
  3. Kerosene
  4. Sand
Question 13 Multiple Choice (Single Answer)

Lowest temperature at which a substrate catches fire is called its

  1. Threshold temperature
  2. Vaporising temperature
  3. Blackening temperature
  4. Ignition temperature
Question 14 Multiple Choice (Single Answer)

A combustible substance is

  1. Water
  2. Wax
  3. Sand
  4. Glass
Question 15 Multiple Choice (Single Answer)

During incomplete combustion, fuel gives out

  1. Blue flame
  2. Oxygenated flame
  3. Yellow flame
  4. Black flame
Question 16 Multiple Choice (Single Answer)

No external heat is required to start

  1. Simultaneous combustion
  2. Spreading fire combustion
  3. Spontaneous combustion
  4. Splendid combustion
Question 17 Multiple Choice (Single Answer)

The color, of the hottest part of the flame is

  1. Blue
  2. Black
  3. Orange
  4. Yellow
Question 18 Multiple Choice (Single Answer)

Some substances burn on their own when kept exposed in air for some time for example

  1. Sulphur
  2. Oxygen
  3. Phosphorus
  4. Carbon
Question 19 Multiple Choice (Single Answer)

It is dangerous to extinguish fire caused by and electric short circuit with the use of

  1. Sand
  2. Water
  3. Carbon dioxide
  4. Carbon monoxide
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