What is a typical efficiency for a diesel engine? o A. 40% B. 25% C. C. 6096 D.

Question

What is a typical efficiency for a diesel engine? o A. 40% B. 25% C. C. 6096 D. 100% QUESTION 8 True or False. The thermal efficiency of a heat engine can be described in terms of the magnitude of heat transfer between the heat engine and the high temperature source and the low temperature sink. True False QUESTION 9 Which of the following is NOT true about heat engines? A. They involve a working fluid, to which heat is transferred from the source B. They operate on a cycle C.They receive heat from a high temperature source D. They convert all of the heat received to work Save All Anes Click Save and Submit to save and submit. Click Save All Answers to save all answers 80 16

Explanation / Answer

QUESTION NO:7

ANS:A

The efficiency of the diesel engine is 40%. usually the diesel engines are used to convert 40 of fuel energy into mechanical energy.

QUESTION NO:8

ANS: TRUE

Thermal efficciency of a heat engine can be described interms of magnitude of heat transfer between the heat engine and the high temperature source and low temperature sink.

QUESTION NO:9

ANS:D

the heat engine can not be convert all the heat recieved into work. some energy may lose. every engine can not not convert all the heat into work.this is second law of thermodynamics.

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