• Mechnical Engineering Reference

# Thermodynamics MCQ Questions And Answers

Thermodynamics MCQs : Here you will find MCQ Questions related to "basics" in Thermodynamics. These basic MCQ Questions Will help you to improve your Thermodynamics knowledge and will prepare you for various Examinations like Competitive Exams, Placements, Interviews and other Entrance Exmaniations

Question 1

Thermodynamics is a branch of physics that deals with?

A. heat
B. work
C. temperature
D. All of the above

Question 2

How many laws of thermodynamics there?

A. 3
B. 4
C. 5
D. 6

Question 3

The first law of thermodynamics, also known as?

A. Law of Conservation of Energy
B. Isolated systems
C. Law of Conservation of Temerature
D. Law of Conservation of Work

Question 4

The entropy of a pure crystalline substance (perfect order) at absolute zero temperature is?

A. -1
B. 1
C. 0
D. Infinite

Question 5

In second law, When the room is cleaned, its entropy?

A. increases
B. decreases
C. remain same
D. None of the above

Question 6

Chemical thermodynamics is the study of the interrelation of energy with chemical reactions

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

Question 7

A piston/cylinder with a cross-sectional area of 0.01 m^2 is resting on the stops. With an outside pressure of 100 kPa, what should be the water pressure to lift the piston?

A. 178kPa
B. 188kPa
C. 195kPa
D. 198kPa

Question 8

A large exhaust fan in a lab room keeps the pressure inside at 10 cm water relative vacuum to the hallway? What is the net force acting on the door measuring 1.9 m by 1.1 m?

A. 2020 N
B. 2030 N
C. 2040 N
D. 2050 N

Question 9

A 5 m long vertical tube having cross sectional area 200 cm^2 is placed in a water. It is filled with 15°C water, with the bottom closed and the top open to 100 kPa atmosphere. How much water is present in tube?

A. 95.9 kg
B. 99 kg
C. 99.9 kg
D. 101.9 kg