Chemical Engineering - Chemical Engineering Basics

6. 

Non-ferrous alloys used for making cutting tools need not have high

A. abrasion resistance
B. toughness
C. red hardness
D. cutting speed

Answer: Option B

Explanation:

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7. 

Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.

A. forging
B. cold rolling
C. hot rolling
D. casting

Answer: Option B

Explanation:

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8. 

Capacity & power requirement for an air compressor working at high altitude compared to sea-level will be

A. more
B. less
C. same
D. either more or less; depends on the climatic conditions.

Answer: Option B

Explanation:

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9. 

Glycerene is used as a coolant in cooling of some engines instead of water, because

A. its higher boiling point (290°C) increases its heat carrying capacity.
B. compartively less weight of coolant is required.
C. smaller radiator can be used.
D. all a, b & c.

Answer: Option D

Explanation:

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10. 

Cold working of a material results in increase in hardness, which is termed as the __________ hardening.

A. cold
B. work
C. age
D. induction

Answer: Option B

Explanation:

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