Test: Second Law of Thermodynamics - 2


10 Questions MCQ Test Thermodynamics | Test: Second Law of Thermodynamics - 2


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Attempt Test: Second Law of Thermodynamics - 2 | 10 questions in 30 minutes | Mock test for Mechanical Engineering preparation | Free important questions MCQ to study Thermodynamics for Mechanical Engineering Exam | Download free PDF with solutions
QUESTION: 1

Which aspect is not true in the context of the efficiency of a Carnot cycle engine?The efficiency of a Carnot cycle engine

Solution:
QUESTION: 2

Consider the following statements:
1. It is the second law of thermodynamics which provides criterion as to the probability of various processes.
2. Heat and work are completely interchangeable forms of energy.
3. Work is high grade energy.
4. The complete conversion of low grade energy into high grade energy in a cycle is impossible.

Which of the above statements are correct

Solution:
QUESTION: 3

The four processes of the Carnot cycle are

Solution:


Hence Carnot cycle consists of two reversible isothermal and two isentropic process.

QUESTION: 4

Perpetual motion machine of second kind violates the

Solution:


The heat engine will produce net work in a complete cycle by exchanging heat with only single reservoir thus violating the Kelvin-Piank
statement

QUESTION: 5

The efficiency of a thermodynamic cycle cannot be infinite since it

Solution:
QUESTION: 6

 Second law of thermodynamics defines

Solution:
QUESTION: 7

Kelvin-plank law deals with

Solution:

Kelvin-Plank gives the concept of heat engine hence, it is conversion of heat into work.

QUESTION: 8

The efficiency of the Carnot cycle may be increased by

Solution:
QUESTION: 9

In a Carnot engine, when working substance gives heat to the sink

Solution:

In Carnot engine, source and sink is thermal energy reservoir hence as heat is rejected or extracted, temperature does not change.

QUESTION: 10

Which of the following represents Carnot cycle

Solution:
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