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- 1. Multiple Choice
Which substance give heat and light after combustion
flame
fuel
combustion
none of these
- 2. Multiple Choice
Like fuel the sun also provides heat and light. The process taking place in the sun is called
combustion
nuclear process
burning
all of these
- 3. Multiple Choice
The substances which have very low ignition temperature will
catch fire easily
will not catch fire
catch fire after some time
none of these
- 4. Multiple Choice
CNG and LPG are the examples of
solid fuels
liquid fuels
gaseous fuels
they aren't fuels
- 5. Multiple Choice
what is combustion
chemical process
physical process
none of these
both a & b
- 6. Multiple Choice
Combustion is a reaction in which a substance reacts with
hydrogen
Nitrogen
Oxygen
Chlorine
- 7. Multiple Choice
An ideal fuel is cheap, readily available, easily combustible and easy to transport. It has high calorific value. It does not produce gases or residues that pollute the environment. Based on the above statements which of the following is closest to being an ideal fuel?
Compressed Natural Gas (CNG)
Kerosene
Petrol
Coal
- 8. Multiple Choice
Which is the hottest part in the flame of the candle
Yellow
Wax part
Black
Blue
- 9. Multiple Choice
Good fuel is
Readily available
Cheap
Burn easily in air
All of these
- 10. Multiple ChoiceWhich type of fire extinguisher should be used on a fire involving flammable liquids such as grease or oil?WaterCarbon DioxideDry ChemicalFoam
- 11. Multiple Choice
Moderately hot zone in a candle flame
outer zone
middle zone
innermost zone
wax candle
- 12. Multiple Choicewhat is the type of combustion
which occurs rapidly and produce heat and light?rapid combustionspontaneous combustionfast combustionexplosion - 13. Multiple Choice
Fire is extinguished by
removing all combustible substance
cutting off supply of air
cooling the burning substance
all the these
- 14. Multiple Choice
What do not produce flames but generate heat
Oil
Coal
Petroleum
Wood
- 15. Multiple Choice
Which one of the following is combustible?
Iron nail
Glass
Stone pieces
Paper
- 16. Multiple Choice
Fuel may be
Solid
Liquid
Gas
All of the three
- 17. Multiple Choice
When a cracker is ignited, a sudden reaction takes place with the evolution of heat, light and sound. Identify the type of combustion?
Explosion
Random combustion
Rapid combustion
Spontaneous combustion
- 18. Multiple Choice
coal burns with _________
flame
only glow
both a & b
none of these
- 19. Multiple ChoiceWater is not used to control fires involving electrical appliances.FalseTrue
- 20. Multiple ChoiceThe three sides to the fire triangle are;Petrol, Spark, OxygenHeat, Fuel, OxygenHeat, Paper, AirMatch, Paper, Air
- 21. Multiple Choice
8.7: Combustion is when a __________ reacts with oxygen
petrol
fuel
fire triangle
carbon dioxide
- 22. Multiple Choice
he picture below shows two cases in which a person is trying to burn the paper cup. In case 1, the cup has water in it and in case 2, it is empty and dry. Identify in which of the cases the paper will burn.
Case 1
case 2
Both case 1 and case 2
D. The paper doesn’t burn in both the cases.
- 23. Multiple Choice
Which one of the following is fuel of our body?
Petrol
Diesel
Water
Food
- Answer choicesTagsAnswer choicesTags