Material Science And Metallurgy (3131904) MCQs

MCQs of Allotropy of Iron, Iron-Iron-Carbide equilibrium system

Showing 11 to 20 out of 79 Questions
1 2 3 4 5 6
11.

Cast iron is a

(a)

ductile material
(b)

malleable material
(c)

brittle material
(d)

tough material
Answer:

Option (c)

12.

The cupola is used to manufacture

(a)

pig iron
(b)

cast iron
(c)

wrought iron
(d)

steel
Answer:

Option (b)

13.

The carbon in the pig iron varies from

(a)

0.1 to 0.5%
(b)

0.5 to 1%
(c)

1 to 5%
(d)

5 to 10%
Answer:

Option (c)

14.

The percentage carbon content in wrought iron is about

(a)

0.02
(b)

0.1
(c)

2
(d)

0.4
Answer:

Option (a)

15.

Wrought iron

(a)

is a ductile material
(b)

can be easily forged or welded
(c)

cannot stand sudden and excessive shocks
(d)

all of these
Answer:

Option (d)

16.

Chilled cast iron is produced

(a)

by adding magnesium to molten cast iron
(b)

by quick cooling of molten cast iron
(c)

from white cast iron by annealing process
(d)

none of these
Answer:

Option (b)

17.

Iron ore is, usually, found in the form of

(a)

oxides
(b)

carbonates
(c)

sulphides
(d)

all of these
Answer:

Option (d)

18.

Free carbon in iron makes the metal

(a)

soft and gives a coarse grained crystalline structure
(b)

soft and gives a fine grained crystalline structure
(c)

hard and gives a coarse grained crystalline structure
(d)

hard and gives a fine grained crystalline structure
Answer:

Option (a)

19.

Haematite iron ore contains iron about

(a)

30%
(b)

45%
(c)

55%
(d)

70%
Answer:

Option (d)

20.

The percentage of carbon in cast iron varies from

(a)

0.1 to 0.5
(b)

0.5 to 1
(c)

1 to 1.7
(d)

1.7 to 4.5
Answer:

Option (d)

Showing 11 to 20 out of 79 Questions
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