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- 1. Multiple Choice
Coal burns with__________
Flame
Only Glow
Both flame & glow
None of these
- 2. Multiple Choice
Combustion is a ____________
Physical process
Chemical process
Both of these processes
None of these
- 3. Multiple Choice
CNG & LPG are examples of
Solid fuels
Liquid fuels
Gaseous fuels
They are not fuels
- 4. Multiple Choice
There are following zones of flame
Two
Four
Three
No zone
- 5. Multiple Choice
The substance which have very low ignition temperature will
Catch fire easily
Will not catch fire
Catch fire after sometime
None of these
- 6. Multiple Choice
Burning of charcoal in room will produce
Carbon dioxide
Nitrogen dioxide
Carbon monoxide
All of these
- 7. Multiple Choice
Substance which catch fire are called
Acids
Bases
Burners
Combustible
- 8. Multiple Choice
The amount of heat energy produced on complete combustion of 1 kg of fuel is called
Calorific value
Significant value
Heat value
Internal value
- 9. Multiple Choice
Which is non combustible substance?
Wood
Paper
Straw
Iron nails
- 10. Multiple Choice
Essential requirements for producing fire are
Fuel
Air
Heat
All of these
- 11. Multiple Choice
Which is the hottest part in flame of candle ?
Blue (outer)
Yellow (middle)
Black (inner)
Wax part
- 12. Multiple Choice
Rapid combustion is
When gas burns, it produces heat & light
When material suddenly burst into flames
When there is evolution of heat
None of these
- 13. Multiple Choice
Calorific value is measured in
Kilo joules
Kilo grams
Kilo joules per kg
Kilo metre
- 14. Multiple Choice
Unburnt carbon particles causes
Stomach infection
Respiratory problems
Brain infections
Throat problems
- 15. Multiple Choice
Global warming is caused due to ___________ concentration of CO2 in air
Decreased
Increased
Both a & b
None of these
- 16. Multiple Choice
Substance that does not burn in air is
Sand
Kerosene
Wood
Diesel
- 17. Multiple Choice
Which zone represent the partial (half) combustion in candle flame
Outer zone
Middle zone
Inner zone
Lower zone
- 18. Multiple Choice
Cutting off trees at large scale leads to
Deforestation
Afforestation
Reforestation
Both deforestation & afforestation
- 19. Multiple Choice
Bursting of crackers is an example of
Rapid combustion
spontaneous combustion
Explosion
All of these
- 20. Multiple Choice
The acronym for putting out a fire using a fire extinguisher is PASS . What does PASS stands for
Pull, aim, squeeze, spread
Pul, accuracy, squeeze, spread
Pin, aim, squeeze, sweep
Pull, aim, squeeze, sweep
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