TOPIC- FIRE
1. What Is Fire or Fire
Tri-angle?
Ans: -Fire is
combustion reaction between oxygen in the atmosphere. Fuel and in presence of
Heat at requisite Temperature. The Fire
Triangle illustrates the basic strategy for starting, preventing &
extinguishing fire.
OR
Fire
is a Chemical Reaction between Three Elements Heat, Fuel & Oxygen.
2. What Is Heat?
Ans: The energy required to ignite fuels varies. E.g.
hydrogen is radically ignited, where as dust require more heat energy for
combustion to take place.
3. Explain Different Types Of
Fuels?
Ans:
1) Solid:-
Solid is carbonyls’ materials which have definite shape and
size.
When solid is heated expands in all three dimensions like
length, thickness and Breadth.
2) Liquid:-
Liquid have no shape and size and therefore no fix
dimension other than volume, co-efficient of cubical expansion of liquid is
much greater than solid.
3) Gas:-
Gas expands
to feel all available free space the volume of gas may be changed by
alternating volume of its containers if volume decrease pressure will be
increase and vice-versa composite.
4. What Is Fire Tetrahedron?
Ans: The fire tetrahedron is an addition to the fire
triangle. It adds the requirement for the presence of chemical reaction, which
is the process of fire
5. What’s The Range of Heat
Required For Occur The Fire?
Ans: -Combustible
Materials :- (More than 37.5° to 100 F).
Flammable Materials :- (Less than 37.5°
to 100F)
6. What Is Flash Point?
Ans:It is lowest temperature at which there is sufficient
vaporization of this substance to produce vapor, will flash momentarily when
foam applied
7. What Is Fire Point?
Ans: -Lowest temperature at which Heat from combustion of
burning vapor is capable to producing sufficient vapor to enable combustion to
continue.
8. Explain Different Types Of
Extinguishing Media Of Fire?
Ans:-
1) Starvation: - To Remove
fuel from the scene of fire.
2) Smothering: - To remove
Oxygen from the scene of fire.
3) Cooling: - To remove Heat
from the scene of fire.
4) Inhibiting: - To break Exothermic
Reaction.
9. Explain Different Types Of
Extinguishing Agents Of Fire?
Ans: -1)
Dry chemical powder / Dry powder.
2) Sand (Buckets).
3) Carbon dioxide (CO2).
4) Fire Blankets.
5) Foam (AFFF).
6) Water
10.
Explain Different Types Of Heat Transfer Method?
Ans: -
1) Direct Contact:-
In their early stages most
fires spread almost entirely direct by burning between a flame and a
combustible material. Which heats up and eventually ignite? As the get what are
the material liberate flammable vapor and this also ignite.
2) Conduction:-
Conduction describes the transfer of heat within a solid
material from whatever to cooler parts. Different material conducts heat at
different rates.
Metal conduct heat well e.g. once heat reaches a still
structural members it will be conducted a Longley rapidly and bricks and
concrete will conduct heat at much lower rate.
3) Radiation
Heat can be radiated through the air causing heating materials
at a distance from the fire. One of the reason why fire develop so quickly in
an enclosed space is that radiated heat courses other parts of room to heat
rapidly. Material that is not in contact with will reach their flash point.
4) Convection
Hot air rises in
current causing the build up the hot gases under the selling it also passes
easily through small gaps. The air in a burning room can exceed 1000C. Air at
this temperature will quickly allow a fire will spread one room to another.
11.
What Is The Method Of Fire Prevention?
Ans:-
1) No
combustible material is to be present in the area.
2) Al
least charged portable extinguisher available at workplace.
3)
Temporary power supply must be within approved (source) generator was fitted
with (GFCI) or (ELCB).
4) All
Drainage / sewer are kept cursed with fire blankets.
5) No
Smoking shall be allowed in the work area.
6) All
portable power tools are to be inspected on daily basis / and before use to
ensure no expose wire.
12.
Explain Different Class’s Of Fire with Examples & Uses
of Extinguisher of Fire in Table?
Ans:-
|
Sr.No.
|
Class
|
Type of Fuel
|
Example of
Fuel
|
Extinguishing
Agent
|
|
1
|
A
|
Combustible solid/ ordinary
|
Card Board, Paper, wood, cloth, coal etc.
|
Water type extinguisher
|
|
2
|
B
|
Flammable liquids Or Gases Fire
|
Petrol, diesel, kerosene, wax grease, LNG, CNG,
Propane, Butane
|
Foam type Extinguisher
|
|
3
|
C
|
Energized Electrical Fire
|
Electrical Equipment like , Electrical Motors &
Electrical Equipments
|
CO2 Type Extinguisher (Carbon Dioxide)
|
|
4
|
D
|
Metal Fire
|
Aluminum magnesium, usenium, copper etc
|
Wet chemical or dry chemical powder
|
|
5
|
K
|
Combustible cooking media
|
Vegetable or animal Oil or fat
|
K type Extinguisher
|
13.
What is RACE?
Ans: - R: Rescue
A:
Alarm
C:
Confined
E:
Extinguished
14.
What is PASS?
Ans: - P: Pull the pin
A: Aim at the base of
the fire
S:
Squeeze the trigger or handle.
S:
Sweep from side by side.
15. What are the sources of Heat?
Ans.
A) Atmospheric Oxygen
B) Stored Oxygen Cylinders
C) Chemical Reaction Releasing Oxygen
D) Certain Plants Releasing Oxygen.
16. What are the common
causes of workplace fire?
Ans:
ü Chemical reaction
ü Friction
ü Arson
ü Metal impact
ü Radiation
ü Overheating and overloading of electrical equipment
ü Static electricity
ü Lighting
ü Hot work (welding, grinding & gas cutting)
ü Sunlight
17. What are the stages involved in fire?
Ans:
There are six stages of fire are as follows:
1) Induction Stage
2) Ignition stage
3) Growth stage
4) Steady Stage
5) Decaying stage
6) Extinguishing stage.
