Mechanical Engineering

To refrain from separation in subsonic nozzles, the expansion angle must not be more than            

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Question:

To refrain from separation in subsonic nozzles, the expansion angle must not be more than            

A.

10 degrees

B.

20 degrees

C.

30 degrees

D.

40 degrees

Answer» a. 10 degrees

Note: The above multiple-choice question is for all general and Competitive Exams in India. 

Which of the following statement with respect to food preservation is true?

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Question:

Which of the following statement with respect to food preservation is true?

A.

leafy vegetables perish fast due to their high moisture content

B.

cereals have the highest requirements of moisture and soil types

C.

cereal can be grown with less labour and yield of food is high

D.

all of the mentioned

Answer» d. all of the mentioned

Note: The above multiple-choice question is for all general and Competitive Exams in India. 

Why is wet compression not preferred?

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Question:

Why is wet compression not preferred?

A.

the liquid refrigerant can be trapped in the head of cylinder

B.

this may damage the valves or cylinder head

C.

liquid refrigerant can wash away the lubricating oil thus accelerating wear

D.

all of the mentioned

Answer» d. all of the mentioned

Note: The above multiple-choice question is for all general and Competitive Exams in India.