Magnesite bricks are used in those parts of furnaces, which are

Magnesite refractories are used for the construction of those furnaces, which are

A

Not required to resist the corrosive action of basic slag

B

Not subjected to fluctuation in temperature

C

Used for raising & maintaining high temperature

D

Both (B) and (C)

A red house is built from red bricks . A blue house is built from blue bricks. A white house is built from white bricks. Then what is a greenhouse made from ?

A

green bricks

B

wood

C

glass

D

steel

The solid brick shown is made of small square shaped bricks of side 1. when the large brick is disassembled into its component small bricks. the total surface area of all the small bricks is how much greater than the surface area of the large brick?

A

32

B

40

C

60

D

72

Magnesite chrome bricks are used in the

A

Roof lining of basic open hearth & other basic furnaces

B

Reheating furnaces

C

Soaking pits

D

All of the above

Chrome magnesite bricks are used in the

A

Side walls of soaking pits and arc furnaces

B

Copper melting furnaces & converters

C

Burner block of glass tanks

D

All of the above

Which of the following impurities reduces the refractoriness of magnesite bricks?

A

Al₂O₃

B

CaO

C

SiO₂

D

All of the above

Magnesite bricks have poor resistance to attack by __________ slag.

A

Lime

B

Basic

C

Acid

D

None of these

Firing temperature of magnesite bricks is about __________ °C.

A

800-1000

B

1000-1200

C

1600-1800

D

2400-2600

Chrome magnesite bricks are

A

Acidic in nature

B

Neutral in nature

C

Having higher RUL than silica bricks

D

Made by mixing 30% chromite and 70% periclase

Maximum apparent porosity of magnesite bricks is about __________ percent.

A

8

B

24

C

44

D

58

Magnesite bricks are used in those parts of furnaces, which are

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