Material Science And Metallurgy (3131904) MCQs

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

Showing 1 to 10 out of 79 Questions
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1.

The percentage of carbon in cast iron varies from

(a)

0.1 to 0.5
(b)

0.5 to 1
(c)

0.5 to 1
(d)

2 to 4.5
Answer:

Option (d)

2.

Nodular cast iron is produced by adding __________ to the molten cast iron.

(a)

nickel
(b)

chromium
(c)

Copper
(d)

Magnesium
Answer:

Option (d)

3.

Grey cast iron has

(a)

carbon in the form of free graphite
(b)

high tensile strength
(c)

low compressive strength
(d)

all of these
Answer:

Option (a)

4.

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)

5.

According to Indian standard specifications, SG 400/15 means

(a)

spheroidal graphite cast iron with B.H.N. 400 and minimum tensile strength 15 MPa
(b)

spheroidal graphite cast iron with minimum tensile strength 400 MPa and 15 percent elongation
(c)

spheroidal graphite cast iron with minimum compressive strength 400 MPa and 15 percent reduction in area
(d)

none of the above
Answer:

Option (b)

6.

White cast iron has

(a)

carbon in the form of carbide
(b)

low tensile strength
(c)

high compressive strength
(d)

all of these
Answer:

Option (d)

7.

The percentage carbon content in wrought iron is about

(a)

0.02
(b)

0.1
(c)

0.2
(d)

0.4
Answer:

Option (a)

8.

According to Indian standard specifications, a plain carbon steel designated by 40 C8 means that the carbon content is

(a)

0.04%
(b)

0.35 to 0.45%
(c)

0.4 to 0.6%
(d)

0.6 to 0.8%
Answer:

Option (b)

9.

The iron ore mostly used for the production of pig iron is

(a)

magnetite
(b)

haematite
(c)

limonite
(d)

siderite
Answer:

Option (b)

10.

For the pipe fitting like elbow, tee, union etc., which of the following is preferred?

(a)

Pig iron
(b)

Malleable iron
(c)

Spheroidal graphite cast iron
(d)

High carbon steel
Answer:

Option (b)

Showing 1 to 10 out of 79 Questions
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