Mechanical Engineering - Engineering Materials

41. 

Cast iron is a ductile material.

A. Correct
B. Incorrect

Answer: Option B

Explanation:

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42. 

Manganese is added in low carbon steel to

A. make the steel tougher and harder
B. raise the yield point
C. make the steel ductile and of good bending qualities
D. all of the above

Answer: Option C

Explanation:

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43. 

Beryllium bronze contains

A. 60% copper and 40% beryllium
B. 80% copper and 20% beryllium
C. 97.75% copper and 2.25% beryllium
D. 99% copper and 1% beryllium

Answer: Option C

Explanation:

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44. 

The portion of the blast furnace below its widest cross-section is called

A. hearth
B. stack
C. bosh
D. throat

Answer: Option C

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45. 

Gamma-iron occurs between the temperature range of

A. 400°C to 600°C
B. 600°C to 900°C
C. 900°C to 1400°C
D. 1400°C to 1530°C

Answer: Option C

Explanation:

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