FURNACE TECHNOLOGY QUIZ

Artificial draught produced by a fan in the furnace can be controlled by the

Variation in the pitch of fan blades

All of these

Damper

Speed of the fan

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following advantages is not associated with the use of preheated air for combustion of a fuel in the furnace?

Increase in calorific value of the fuel

Saving in fuel consumption

Increase in flame temperature

Reduction in scale losses

TRUE ANSWER : ?
YOUR ANSWER : ?

Furnace aerodynamics is related to the __________ in the furnace.

Temperature control

Measurement of flue gas volume

Movement of gases

Pressure adjustment

TRUE ANSWER : ?
YOUR ANSWER : ?

Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600°C, the percentage stack loss will be maximum in case of complete combustion of

Blast furnace gas with oxygen

Furnace oil with air

Blast furnace gas with air

Furnace oil with oxygen

TRUE ANSWER : ?
YOUR ANSWER : ?

The main function of a muffle in the muffle furnace is to

Neither A nor B

Protect the charge from the effects of the products of combustion

Both A & B

Smooth out temperature inequalities on the combustion side of the muffle wall

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Shaft

Rotary hearth

Walking beam

Tunnel

TRUE ANSWER : ?
YOUR ANSWER : ?

Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent.

20

65

80

40

TRUE ANSWER : ?
YOUR ANSWER : ?

Dampers are located

Before the I.D fan

Anywhere after the I.D. fan

Near the top of the chimney

After the I.D. fan

TRUE ANSWER : ?
YOUR ANSWER : ?

Design of waste heat boiler for recovery of waste heat from furnace gases depends upon the

Corrosive nature of the waste gas

All of these

Dust concentration & nature of dust in waste gas

Quantity & temperature of waste gas

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

Thermal conductivity of the charge & structural materials of furnace

All of these

Nature of process ; whether batch, continuous or intermittant

Rate of firing and emissivity of flame

TRUE ANSWER : ?
YOUR ANSWER : ?