An engineer claims to have made an engine delivering 10kw power with fuel consumption of 1g/s. The calorific value of the fuel is 2k cal/g. 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
η=1-T2T1 WQ1=1-T2T1 102(4.2)=1-T2T1 T2T1=1-108.4=-1.68.4=-0.19 T2T1 cannot be negative. So claim of engineer is not possible