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Q.

An engineer claims to have made an engine delivering 10 kW power with fuel consumption of 1 g/sec. The calorific value of the fuel is 2 kcal/g. How is the claim of the engineer ?

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a

Valid

b

Invalid

c

Depends on engine design

d

Depends of the load

answer is B.

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Detailed Solution

Input energy 1 x 2 x 1000 x 4.2 joules/sec and  output is 10x1000 joules /sec. Output is greater than input which is impossible.
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