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 18 of 31

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Q171.
The general gas equation is (where p = Pressure, v = Volume, m = mass, T = Absolute temperature, and R = Gas constant)

a.

pv = mRT

b.

pv = RTm

c.

pvm = C

d.

pv = (RT)m

Discuss
Answer: (a).pv = mRT
Q172.
The work ratio of simple gas turbine cycle depends upon

a.

maximum cycle temperature

b.

minimum cycle temperature

c.

pressure ratio

d.

all of these

Discuss
Answer: (d).all of these
Q173.
The gas constant (R) is equal to the

a.

sum of two specific heats

b.

difference of two specific heats

c.

product of two specific heats

d.

ratio of two specific heats

Discuss
Answer: (b).difference of two specific heats
Q174.
Select the wrong statement

a.

A Joule cycle consists of two constant volume and two isentropic processes.

b.

An Otto cycle consists of two constant volume and two isentropic processes.

c.

An Ericsson cycle consists of two constant pressure and two isothermal processes.

d.

all of the above

Discuss
Answer: (a).A Joule cycle consists of two constant volume and two isentropic processes.
Q175.
Which of the following represents Otto cycle on temperature - entropy (T - s) diagram?

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q176.
Workdone during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and ฮณ = Ratio of specific heats)

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (d).D
Q177.

The heat absorbed during a polytropic process is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (d).D
Q178.
One kg of hydrogen requires 8 kg of oxygen and produces

a.

1 kg of water

b.

7 kg of water

c.

8 kg of water

d.

9 kg of water

Discuss
Answer: (d).9 kg of water
Q179.
The standard value of atmospheric pressure taken at sea level is

a.

1.013 bar

b.

760 mm of Hg

c.

1013 x 102 N/m²

d.

all of these

Discuss
Answer: (d).all of these
Q180.
The efficiency of Otto cycle depends upon the specific heats of the working substance.

a.

Yes

b.

No

c.

Can't say

d.

None of these

Discuss
Answer: (b).No
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