Explore topic-wise MCQs in Thermodynamics.

This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.

1.

The volumetric efficiency is given by

A. 1-C+C(p2/p1)^(1/n)
B. 1+C-C(p2/p1)^(1/n)
C. 1+C+C(p2/p1)^(1/n)
D. 1-C-C(p2/p1)^(1/n)
Answer» C. 1+C+C(p2/p1)^(1/n)
Discussion
2.

Clearance(C) is defined as

A. (piston displacement per cycle / clearance volume )^n
B. piston displacement per cycle / clearance volume
C. clearance volume / piston displacement per cycle
D. (clearance volume / piston displacement per cycle)^n
Answer» D. (clearance volume / piston displacement per cycle)^n
Discussion
3.

The ratio of the actual volume of gas taken into cylinder during suction stroke to the piston displacement volume is called the volumetric efficiency.

A. true
B. false
Answer» B. false
Discussion
4.

The isothermal efficiency of a compressor is given by

A. p1*v1/ total work of compression
B. p1*v1*ln(p2/p1) / total work of compression
C. total work of compression / p1*v1*ln(p2/p1)
D. total work of compression / p1*v1
Answer» C. total work of compression / p1*v1*ln(p2/p1)
Discussion
5.

If there are N stages of compression, then the pressure ratio in each stage is

A. p2/p1 = (discharge pressure/suction pressure)^(1/N)
B. p2/p1 = (suction pressure/discharge pressure)^(1/N)
C. p2/p1 = (discharge pressure/suction pressure)^N
D. p2/p1 = (suction pressure/discharge pressure)^N
Answer» B. p2/p1 = (suction pressure/discharge pressure)^(1/N)
Discussion
6.

For >n>1 and for the same pressure ratio p2/p1, the maximum work is needed for

A. isothermal compression
B. adiabatic compression
C. polytropic compression
D. all need same work
Answer» C. polytropic compression
Discussion