ESTIMATING AND COSTING QUIZ

Which of the following is not a recuperative furnace?

Reheating furnace

Steamboiler

Soaking pit

Coke oven

TRUE ANSWER : ?
YOUR ANSWER : ?

Shaft furnaces are used for

All of these

Roasting

Smelting

Calcining

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following variables does not affect the furnace capacity?

Ratio of wall surface to surface of stock

Size of the furnace

None of these

Gas velocity in furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Which furnace employs an I.D. fan for the removal of flue gases from the furnace?

Beehive coke oven

Coke oven

High pressure boiler

Blast furnace stoves

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a heat treatment furnace?

Rotary kiln

Reheating furnace

Muffle furnace

Annealing furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Means for giving direction to the circulation of gases in furnaces are

All of these

Arrangement of heating stock in the furnaces

Location of outlet ports and heating & combustion devices

Fans

TRUE ANSWER : ?
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Ostwald charts are meant for

Computation of flue gas analysis

Computing the excess/deficiency of combustion air

Calculation of flue gas temperature

None of these

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YOUR ANSWER : ?

Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent.

25-30

65-70

45-50

44119

TRUE ANSWER : ?
YOUR ANSWER : ?

An example of a periodic furnace is the

Blast furnace

Coke oven heating chamber

Blast furnace stoves

Rotary kilns

TRUE ANSWER : ?
YOUR ANSWER : ?

Fuel economy in furnaces can be achieved by

Using oxygen enriched combustion air

Preheating the combustion air

All of these

Reducing the heat loss through furnace openings & doors

TRUE ANSWER : ?
YOUR ANSWER : ?

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