Thermodynamics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Thermodynamics, a fundamental topic in the field of Mechanical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Thermodynamics MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Thermodynamics mcq questions that explore various aspects of Thermodynamics problems. Each MCQ is crafted to challenge your understanding of Thermodynamics principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Mechanical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Thermodynamics MCQs are your pathway to success in mastering this essential Mechanical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Thermodynamics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Thermodynamics knowledge to the test? Let's get started with our carefully curated MCQs!

Thermodynamics MCQs | Page 8 of 31

Discuss
Answer: (c).conversion of heat into work
Q72.
Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle
Discuss
Answer: (d).heat rejection is lower
Q73.
Liquid fuels have higher calorific value than solid fuels.
Discuss
Answer: (a).Yes
Q74.
The free expansion process is __________ non-flow process.
Discuss
Answer: (b).irreversible
Q75.
A mixture of gas expands from 0.03 m³ to 0.06 m³ at a constant pressure of 1 MPa and absorbs 84 kJ of heat during the process. The change in internal energy of the mixture is
Discuss
Answer: (b).54 kJ
Q76.
The gas constant (R) is equal to the __________ of two specific heats.
Discuss
Answer: (b).difference
Discuss
Answer: (a).it is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
Q78.
According to Gay-Lussac law, the absolute pressure of a given mass of a perfect gas varies __________ as its absolute temperature, when the volume remains constant.
Discuss
Answer: (a).directly
Discuss
Answer: (c).equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules
Q80.
A process, in which the temperature of the working substance remains constant during its expansion or compression, is called
Discuss
Answer: (a).isothermal process