Engineering Materials

Question: A steel containing 12 to 14% chromium and 0.12 to 0.35% carbon is called martensitic stainless steel.
[A].

True

[B].

False

Answer: Option A

Explanation:

No answer description available for this question.

Question: In high speed steels, vanadium adds to the property of red hardness and tungsten and chromium add to high wear resistance.
[A].

True

[B].

False

Answer: Option A

Explanation:

No answer description available for this question.

Question: The blade of a power saw is made of
[A].

boron steel

[B].

high speed steel

[C].

stainless steel

[D].

malleable cast iron

Answer: Option B

Explanation:

No answer description available for this question.

Question: The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is
[A].

chromium

[B].

nickel

[C].

vanadium

[D].

cobalt

Answer: Option D

Explanation:

No answer description available for this question.

Question: The alloying element which reduces the formation of iron sulphide in steel is
[A].

chromium

[B].

nickel

[C].

vanadium

[D].

manganese

Answer: Option D

Explanation:

No answer description available for this question.

Question: The alloy, mainly used for corrosion resistance in stainless steels is
[A].

silicon

[B].

manganese

[C].

carbon

[D].

chromium

Answer: Option D

Explanation:

No answer description available for this question.

Question: Ball bearings are, usually, made from
[A].

low carbon steel

[B].

high carbon steel

[C].

medium carbon steel

[D].

chrome steel

Answer: Option D

Explanation:

No answer description available for this question.

Question: Free cutting steels
[A].

contain carbon in free from

[B].

require minimum cutting force

[C].

is used where rapid machining is the prime requirement

[D].

can be cut freely

Answer: Option C

Explanation:

No answer description available for this question.

Question: The alloying element which can replace tungsten in high speed steels is
[A].

nickel

[B].

vanadium

[C].

cobalt

[D].

molybdenum

Answer: Option D

Explanation:

No answer description available for this question.

Question: Connecting rod is, usually, made from
[A].

low carbon steel

[B].

high carbon steel

[C].

medium carbon steel

[D].

high speed steel

Answer: Option C

Explanation:

No answer description available for this question.