Mechanical Engineering

Question: In the lower part of the blast furnace (zone of fusion), the temperature is
[A].

400° to 700°C

[B].

800°C to 1000°C

[C].

1200°C to 1300°C

[D].

1500°C to 1700°C

Answer: Option C

Explanation:

No answer description available for this question.

Question: The approximate height of a blast furnace is
[A].

10 m

[B].

20 m

[C].

30 m

[D].

40 m

Answer: Option C

Explanation:

No answer description available for this question.

Question: Blast furnace is used to produce
[A].

pig iron

[B].

cast iron

[C].

wrought iron

[D].

steel

Answer: Option A

Explanation:

No answer description available for this question.

Question: Haematite iron ore contains iron about
[A].

30%

[B].

45%

[C].

55%

[D].

70%

Answer: Option D

Explanation:

No answer description available for this question.

Question: Iron ore is, usually, found in the form of
[A].

oxides

[B].

carbonates

[C].

sulphides

[D].

all of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: Cast iron is a ductile material.
[A].

Correct

[B].

Incorrect

Answer: Option B

Explanation:

No answer description available for this question.

Question: Brittle materials when subjected to tensile loads, snap off without giving any sensible elongation.
[A].

Yes

[B].

No

Answer: Option A

Explanation:

No answer description available for this question.

Question: Which of the following property is desirable in parts subjected to shock and impact loads?
[A].

Strength

[B].

Stiffness

[C].

Brittleness

[D].

Toughness

Answer: Option D

Explanation:

No answer description available for this question.

Question: Which of the following property is desirable for materials used in tools and machines?
[A].

Elasticity

[B].

Plasticity

[C].

Ductility

[D].

Malleability

Answer: Option A

Explanation:

No answer description available for this question.