FURNACE TECHNOLOGY QUIZ

A refractory wall separating the stock and the source of heat is provided in a

None of these

Muffle furnace

Updraft kiln

Continuous furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Cement Kiln is a

Tunnel Kiln

Natural draft furnace

Batch furnace

Rotary Kiln

TRUE ANSWER : ?
YOUR ANSWER : ?

Protective gas used in the annealing furnace for steel coil comprises of

95% N₂ + 5% H₂

100% CO

100 %H₂

5% H₂ + 9% N₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Calcination of limestone to produce lime is done in a __________ kiln.

Both B and C

Rotary

Tunnel

Vertical shaft

TRUE ANSWER : ?
YOUR ANSWER : ?

In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the

Nature of process ; whether batch, continuous or intermittant

Thermal conductivity of the charge & structural materials of furnace

All of these

Rate of firing and emissivity of flame

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following variables affects the furnace capacity?

Thickness of heating stock

Temperature of flue gas

All of these

Thermal conductivity of stock

TRUE ANSWER : ?
YOUR ANSWER : ?

In order to maintain an oxidising atmosphere in a furnace, it should have

More of CO₂ in flue gas

More of excess air

Less of excess air

More of CO in flue gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Scaling of furnace stock is reduced by __________ in flue gas.

All of these

CO

High CO/CO₂

H₂

TRUE ANSWER : ?
YOUR ANSWER : ?

hich is the most thermally efficient furnace?

Reheating furnace

Reverberatory furnace

Boiler furnace

Rotary kilns

TRUE ANSWER : ?
YOUR ANSWER : ?

Furnace pressure is normally controlled by regulating the

Speed of I.D. fan

Air pressure

Fuel gas pressure

Damper

TRUE ANSWER : ?
YOUR ANSWER : ?

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