GATE & PSUs - Mechanical Engineering (ME)

First & Second Law of Thermodynamics, Entropy question bank (Thermodynamics & Thermal Sciences)

Practice 7 free GATE & PSUs - Mechanical Engineering (ME) Thermodynamics & Thermal Sciences - First & Second Law of Thermodynamics, Entropy questions with answers and step-by-step solutions.

Start free Book a demo

All Hard Medium

Q1.

An ideal gas undergoes a reversible polytropic process $PV^n = C$. If the heat capacity ratio is $\gamma = C_p / C_v$, for what value of $n$ does the heat transfer during the process equal zero?

(A)

$n = \gamma$

(B)

$n = 1$

(C)

$n = 0$

(D)

$n = \infty$

Show answer & solution

Verified Answer & Solution Locked

Q2.

[First & Second Law of Thermodynamics, Entropy Concept 6] A Carnot heat engine operates between source temperature $T_H = 800\text{ K}$ and sink temperature $T_L = 400\text{ K}$. It rejects $1200\text{ kJ}$ of heat to the sink. What is the net mechanical work output developed by the engine?

(A)

$1200\text{ kJ}$

(B)

$2400\text{ kJ}$

(C)

$600\text{ kJ}$

(D)

$1800\text{ kJ}$

Show answer & solution

Verified Answer & Solution Locked

Protected Questions

Unlock All 7 Questions in First & Second Law of Thermodynamics, Entropy

Log in or sign up free to access every question with complete solutions, create chapter practice tests, and track your performance.

Sign up free to access all 7 questions

Unlock every First & Second Law of Thermodynamics, Entropy question, generate papers, and practice at your own pace.

Start free