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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

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Mechanical Engineering MCQs prepared for job test and interview preparation, especially for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover key topics such as Machine Design, Theory of Machines, Hydraulic Machines, and other important mechanical engineering concepts.

All Topics  1919

According to kinetic theory of gases, the absolute zero temperature is attained when___________________?
A volume of the gas is zero
B pressure of the gas is zero
C kinetic energy of the molecules is zero
D specific heat of gas is zero
Correct Answer: kinetic energy of the molecules is zero
No liquid can exist as liquid at____________________?
A – 273 °K
B vacuum
C zero pressure
D centre of earth
Correct Answer: zero pressure
The pressure’of a gas in terms of its mean kinetic energy per unit volume E is equal to________________?
A E/3
B E/2
C 3E/4
D 2E/3
Correct Answer: E/3
The unit of power in S.I. units is_______________________?
A newton
B pascal
C erg
D watt
Correct Answer: watt
Superheated vapour behaves___________________?
A exactly as gas
B as steam
C as ordinary vapour
D approximately as a gas
Correct Answer: approximately as a gas
Intensive property of a system is one whose value____________________?
A depends on the mass of the system, like volume
B does not depend on the mass of the system, like temperature, pressure, etc
C is not dependent on the path followed but on the state
D is dependent on the path followed and not on the state
Correct Answer: does not depend on the mass of the system, like temperature, pressure, etc
Characteristic gas constant of a gas is equal to______________________?
A C/Cv
B Cv/Cp
C Cp – Cv
D Cp + Cv
Correct Answer: Cp – Cv
The ratio of two specific heats of air is equal to____________________?
A 0.17
B 0.24
C 0.1
D 1.41
Correct Answer: 1.41
Which law states that the internal energy of a gas is a function of temperature__________________?
A Charles’ law
B Joule’s law
C Regnault’s law
D Boyle’s law
Correct Answer: Joule’s law
Which law states that the specific heat of a gas remains constant at all temperatures and pressures______________________?
A Charles’ Law
B Joule’s Law
C Regnault’s Law
D Boyle’s Law
Correct Answer: Regnault’s Law
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