# 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

Solution:
QUESTION: 2

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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