Correct Answer - Option 2 : Allow the air in the combustion zone of cupola
Explanation:
The forge supplies heat for raising the temperature of the metal to be forged.
Parts of a forge and their use:
-
Hearth:
- It is the main part where the heating of the metal takes place
- It is prepared with refractory (fire bricks) and clay
-
Tuyeres:
- The forced air is sent through the tuyeres to burn the fuel
- The tuyeres are covered with refractory material to avoid melting
- The air also passes through a cooling tank
-
Cooling tank:
- To keep the tuyere cool always, the cooling tank is filled with cold water
-
Air Valve:
- The air valve is used to regulate the supply of air to the hearth
-
Blower:
- The blower supplies air to the forge for burning the coal or coke
- The blowers are operated manually or by electric power
-
Hood and chimney:
- Smoke and dust are let out through the hood and the chimney
- The fumes given off by a coal forge are toxic; therefore, good ventilation is essential
-
Quenching tank:
- A quenching tank is provided along with the forge
- It is filled with water for cooling the hot tools and workpieces
- The tank Is also used for hardening and tempering
-
Coal tank:
- It is used for the storing of fuel for the forge
- Generally, solid fuels are used i.e. coal, coke and charcoal
