JAVA CONSTRUCTORS AND METHODS QUIZ

High refractorinness of refractory bricks means, that it has a

Low porosity

High spalling resistance

High resistance to fusion

Low spalling resistance

TRUE ANSWER : ?
YOUR ANSWER : ?

Silica refractories

Crack when subjected to sudden change of temperature

Can not be used in the dome of hot blast stoves

Have lower thermal conductivity than fireclay bricks

All of these

TRUE ANSWER : ?
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__________ bricks should not be used in oxidising atmosphere.

Fireclay

Carbon

Tar dolomite

Silica

TRUE ANSWER : ?
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Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory

None of these

Cements

Castables

Mortars

TRUE ANSWER : ?
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Which is the stable form of silica below 870°C ?

Quartz

None of these

Cristobalite

Tridymite

TRUE ANSWER : ?
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Fireclay bricks are not used in the

Coke oven regenerators

Combustion chamber of B.F. stoves

Beehive coke oven

By-product coke oven walls

TRUE ANSWER : ?
YOUR ANSWER : ?

Which brick undergoes maximum shrinkage on drying?

Fireclay bricks

Tar bonded dolomite bricks

Magnesite bricks

Chromite bricks

TRUE ANSWER : ?
YOUR ANSWER : ?

Firing temperature of magnesite bricks is about __________ °C.

800-1000

1000-1200

1600-1800

2400-2600

TRUE ANSWER : ?
YOUR ANSWER : ?

Si percentage in silica refractories used in the walls of coke oven is about

95

80

60

45

TRUE ANSWER : ?
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Hollow refractory bricks are made by

Slip casting

Hand moulding

Extrusion

Pressing/machine moulding

TRUE ANSWER : ?
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