SSC JE Mechanical Engineering 3rd March 2017 Shift-2

Instructions

For the following questions answer them individually

Question 21

In regenerator type heat exchanger, heat transfer takes place by

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Question 22

Film coefficient is the ratio of _____.

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Question 23

Highest thermal diffusivity is of _____.

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Question 24

Highest thermal conductivity is of _____.

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Question 25

The ratio of work done per cycle to the swept volume in case of compressor is called

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Question 26

The indicator diagram shown in the figure below obtained on a compressor shows that _______.

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Question 27

Metals are good heat conductors because _____.

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Question 28

Heat is transferred from an insulated pipe to the surrounding still air by _____.

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Question 29

Heat is transferred by conduction, convection and radiation in _____.

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Question 30

In optical pyrometers absorption filter is used _____.

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