Combustion and Fuels
Questions about combustion, flames, fuels, calorific values, and fire extinguishing methods.
Questions
Question 1 Multiple Choice (Single Answer)
Which of the following supports combustion?
- Carbon dioxide
- Oxygen
- Water vapour
- Sand
Question 2 Multiple Choice (Single Answer)
Which of the following statements is true regarding CO2 acting as fire extinguisher?
- CO2 reacts with oxygen.
- CO2 is lighter than oxygen.
- CO2 is heavier than oxygen.
- CO2 raises the temperature of the fuel.
Question 3 Multiple Choice (Single Answer)
Which of the following is a non-inflammable substance?
- Petrol
- Wood
- Alcohol
- LPG
Question 4 Multiple Choice (Single Answer)
Which of the following substances does not produce flame on burning?
- Calcium
- Magnesium
- Camphor
- Charcoal
Question 5 Multiple Choice (Single Answer)
Which of the following represents calorific value of a fuel?
- Heat energy liberated by complete burning of 1 g of fuel.
- Heat energy liberated by complete burning of 1 kg of fuel.
- 1 kJ energy liberated by complete burning of any amount of fuel.
- None of the above
Question 6 Multiple Choice (Single Answer)
Which of the following is not a constituent of coal gas?
- Sulphur dioxide
- Hydrogen
- Methane
- Carbon monoxide
Question 7 Multiple Choice (Single Answer)
Which of the following is not a zone of flame?
- Dark zone
- Luminous zone
- Combustible zone
- Non-luminous zone
Question 8 Multiple Choice (Single Answer)
Which of the following is not a property of ideal fuel?
- It is cheap.
- It produces large amount of heat.
- It burns quickly in air.
- It does not leave behind any residue and any undesirable substance.
Question 9 Multiple Choice (Single Answer)
Which of the following has the maximum calorific value?
- C.N.G
- L.P.G
- Biogas
- Hydrogen
Question 10 Multiple Choice (Single Answer)
Which of the following gases is/are responsible for acid rain?
- Oxides of sulphur and nitrogen
- Oxides of carbon
- Oxides of hydrogen
- Oxides of phosphorus