Question

S
Which of the following materials is not combustible?
(a) Matchsticks (b) Paper
(C) Glass
(d) Wood
Which of the following is not a condition necessary for combustion?
(a) Ignition temperature
(b) Combustion material
(c) Air
(d) Sunlight
5
Which of the following is not a type of combustion?
(a) Rapid combustion
(b) Spontaneous combustion
(c) Explosion
(d) Bursting
16
16
D
Which of the following methods can be used to extinguish a fire?
(a) Increase the ignition temperature
(b) Reduce the ignition temperature
(C) Supply more air
(d) Sprinkle water
Carbon dioxide acts as a fire extinguisher by
(a) cutting the air supply
(b) lowering the ignition temperature
(C) removing the combustible substance (d) all the above
7
3
8
The least hot part of a candle flame is
(a) luminous zone (b) non-luminous zone (c) dark zone
(d) blue zone
C
(
9
Which of the following is not a characteristic of a good fuel?
(a) Low cost
(b) High ignition temperature
(c) Leaves no residue after burning
(d) Produces large quantity of heat​

Answer 1

Answer:

c

d

d

b

d

b

b

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