FURNACE TECHNOLOGY QUIZ

In low or standard frequency induction furnace, heat is produced by the

Current flow through a heating element

Combination of induced current and skin effect

Induction and resistance

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace.

Walking beam

Tunnel

Rotary hearth

Shaft

TRUE ANSWER : ?
YOUR ANSWER : ?

Regenerators are installed in

Open hearth furnace

Neither A nor B

Coke ovens

Both A & B

TRUE ANSWER : ?
YOUR ANSWER : ?

The reason for excessive clinker formation in gas producers is the

Development of hot spots in the fuel bed and an abnormally high rate of gasification

All of these

Use of fuel having too low an ash fusion temperature

Use of coal/coke containing a high % of fines and ash

TRUE ANSWER : ?
YOUR ANSWER : ?

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 : ?

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

All of these

Thermal conductivity of the charge & structural materials of furnace

Rate of firing and emissivity of flame

TRUE ANSWER : ?
YOUR ANSWER : ?

In a muffle furnace, the muffle

Permits the use of controlled atmosphere for the protection of stock

All of these

Retards the heat transfer

Assists in temperature equalisation in the charge

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a directly fired intermittant furnace?

Reverberatory furnace

Tunnel kiln

Walking beam reheating furnace

Tower furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

The heating capacity of continuous reheating furnace depends upon the

Hearth area and furnace temperature

Emissivity of the stock

All of these

Ratio of wall surface to stock surface

TRUE ANSWER : ?
YOUR ANSWER : ?

Power required in case of forced draught as compared to induced draught (for the same draught produced) is

More

Either more or less; depends on the flue gas density Answer: Option B

Less

Same

TRUE ANSWER : ?
YOUR ANSWER : ?