Machine Design

Question: In order to remove internal stresses produced by hardening the steel, the process usually adopted is
[A].

tempering

[B].

annealing

[C].

normalising

[D].

spheroidising

Answer: Option A

Explanation:

No answer description available for this question.

Question: For hardening alloy steels and high speed steels, they are heated to
[A].

500 to 600°C

[B].

700 to 900°C

[C].

1100 to 1300°C

[D].

1300 to 1500°C

Answer: Option C

Explanation:

No answer description available for this question.

Question: A steel containing more than 0.8% carbon is known as eutectoid steel.
[A].

Yes

[B].

No

Answer: Option B

Explanation:

No answer description available for this question.

Question: A steel containing __________ 0.8% carbon is known as hypo-eutectoid steel.
[A].

equal to

[B].

less than

[C].

greater than

Answer: Option B

Explanation:

No answer description available for this question.

Question: A steel containing 0.8% carbon is known as
[A].

eutectoid steel

[B].

hyper-eutectoid steel

[C].

hypo-eutectqid steel

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: The ball bearings are, 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.

Question: According to Indian standard specifications, a plain carbon steel designated by 40C8 contains carbon
[A].

0.20 to 0.40%

[B].

0.35 to 0.45%

[C].

0.40 to 0.60%

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: A steel containing upto 0.15% carbon is known as
[A].

mild steel

[B].

dead mild steel

[C].

medium carbon steel

[D].

high carbon steel

Answer: Option B

Explanation:

No answer description available for this question.

Question: According to Indian standard specifications, a grey cast iron designated by ‘FG 200’ means that the
[A].

carbon content is 2%

[B].

maximum compressive strength is 200 N/mm2

[C].

minimum tensile strength is 200 N/mm2

[D].

maximum shear strength is 200 N/mm2

Answer: Option C

Explanation:

No answer description available for this question.

Question: Which of the following property is essential for spring materials?
[A].

Stiffness

[B].

Ductility

[C].

Resilience

[D].

Plasticity

Answer: Option C

Explanation:

No answer description available for this question.