Chemical Engineering - Chemical Engineering Basics

41. 

Tempering of a material does not improve its

A. machinability
B. toughness
C. internal stress level
D. softness

Answer: Option A

Explanation:

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42. 

High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from __________ percent.

A. 5 to 10
B. 15 to 25
C. 45 to 50
D. 75 to 80

Answer: Option C

Explanation:

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43. 

Which of the following performance characteristics of a S.I engine is not affected by the front end volatility of the petrol used ?

A. Vapour locking.
B. Hot starting.
C. Spark plug fouling.
D. all 'a', 'b' & 'c'.

Answer: Option C

Explanation:

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44. 

__________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.

A. Borosilicate
B. High silica
C. Supermax
D. Lead

Answer: Option C

Explanation:

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45. 

Heat release during phase change is observed in case of a/an

A. boiler
B. condenser
C. evaporator
D. all (a), (b) & (c)

Answer: Option B

Explanation:

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