CHAPTER 4: THERMODYNAMIC CYCLES & SECOND LAW OF THERMODYNAMICS
Flashcard
•
Engineering
•
University
•
Hard
DR MUSTAFFA
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7 questions
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1.
FLASHCARD QUESTION
Front
What does the Second Law of Thermodynamics state about heat transfer?
Back
Heat naturally flows from hot to cold without external influence
2.
FLASHCARD QUESTION
Front
What is the formula for thermal efficiency (η) of a heat engine?
Back
η=Wnet.out/Qin
3.
FLASHCARD QUESTION
Front
A heat engine receives 200 kJ of heat and rejects 80 kJ. What is its thermal efficiency?
Back
60%
4.
FLASHCARD QUESTION
Front
Which of the following is true for a Carnot cycle?
Back
It consists of four reversible processes
5.
FLASHCARD QUESTION
Front
What is the COP (Coefficient of Performance) formula for a refrigerator?
Back
COPR=QL/W
6.
FLASHCARD QUESTION
Front
A Carnot engine operates between 600 K and 300 K. What is its thermal efficiency?
Back
50%
7.
FLASHCARD QUESTION
Front
What is the correct efficiency formula for an ideal Carnot cycle?
Back
η=(1−TL/TH)
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