Chemical Engineering - Materials and Construction

16. 

Constituents of stellite are

A. zinc, copper and nickel.
B. cobalt, chromium and tungsten.
C. zinc, aluminium and nickel.
D. nickel, cobalt and vanadium.

Answer: Option B

Explanation:

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17. 

Residual magnetism in steel for magnets is increased by the addition of

A. nickel
B. cobalt
C. tungsten
D. chromium

Answer: Option B

Explanation:

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18. 

Presence of nickel in steel improves its

A. corrosion resistance.
B. cutting ability.
C. wear resistance.
D. all (a), (b) and (c).

Answer: Option A

Explanation:

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19. 

Cementite is

A. Fe3C chemically.
B. a compound of carbon and iron.
C. characterised by an orthorhombic crystal structure.
D. all (a), (b) and (c).

Answer: Option D

Explanation:

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20. 

Acetylene gas holder is made of

A. copper
B. cast iron
C. steel
D. monel metal

Answer: Option C

Explanation:

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