ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2018

Instructions

For the following questions answer them individually

Question 1

Carnot Cycle consists of

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Question 2

One reversible heat engine operates between $$1600^\circ$$K and $$T_{2}^\circ$$K and another reversible heat engine operates between $$T_{2}^\circ$$K and $$400^\circ$$K. If both the engines have the same heat input and output, then temperature $$T_{2}^\circ$$ is equal to

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Question 3

Isentropic flow is

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Question 4

Reversed Joule cycle is known as

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Question 5

The thermal efficiency of Gas turbine plant is

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Question 6

A 100 W electric bulb was switched on in a $$2.5 m \times 3m \times 3 m$$ size thermally insulated room having temperature of $$20^\circ$$C. The room temperature at the end of 24 hrs. will be

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Question 7

A solar energy based heat engine which receives 80 kJ of heat at $$100^\circ$$C and rejects 70 kJ of heat to the ambient at $$30^\circ$$C is to be designed. The thermal efficiency of heat engine is

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Question 8

A mixure of gases expand from $$0.03 m^{3} to 0.06 m^{3}$$ at constant pressure of 1 MPA and absorb 84 kJ of heat during the process. The change in internal energy of the mixture is

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Question 9

If the concentrated load applied at the free end of a cantilever beam is doubled along with its length and moment of inertia also, then the deflection at free end will increase by

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Question 10

In the case of a beam simply supported at both ends, if the same load instead of being concentrated at centre is distributed uniformly throughout the length, then deflection at
centre will get reduced by

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