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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

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.

If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly_________________?

A temperature

B enthalpy

C internal energy

D entropy

Review Detailed Answer

Correct Answer: entropy

Carnot cycle efficiency is maximum when______________?

A initial temperature is 0°K

B final temperature is 0°K

C difference between initial and final temperature is 0°K

D final temperature is 0°C

Review Detailed Answer

Correct Answer: final temperature is 0°K

Measurement of temperature is based on_________________?

A thermodynamic properties

B zeroth law of thermodynamics

C first law of thermodynamics

D second law of thermodynamics

Review Detailed Answer

Correct Answer: zeroth law of thermodynamics

Addition of heat at constant pressure to a gas results in________________?

A raising its temperature

B raising its pressure

C raising its volume

D raising its temperature and doing external work

Review Detailed Answer

Correct Answer: raising its temperature

Total heat of a substance is also known as __________________?

A internal energy

B entropy

C thermal capacity

D enthalpy

Review Detailed Answer

Correct Answer: enthalpy

Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant_______________?

A pressure

B temperature

C volume

D internal energy

Review Detailed Answer

Correct Answer: volume

Isochoric process is one in which___________________?

A free expansion takes place

B very little mechanical work is done by the system

C no mechanical work is done by the system

D all parameters remain constant

Review Detailed Answer

Correct Answer: no mechanical work is done by the system

Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant________________?

A pressure

B temperature

C volume

D internal energy

Review Detailed Answer

Correct Answer: pressure

Energy can neither be created nor destroyed but can be converted from one form to other is inferred from_________________?

A zeroth low of thermodynamic

B first law of thermodynamics

C second law to thermodynamics

D basic law of thermodynamics

Review Detailed Answer

Correct Answer: first law of thermodynamics

Entropy change depends on___________________?

A heat transfer

B mass transfer

C change of temperature

D thermodynamic state

Review Detailed Answer

Correct Answer: heat transfer

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly_________________?

Carnot cycle efficiency is maximum when______________?

Measurement of temperature is based on_________________?

Addition of heat at constant pressure to a gas results in________________?

Total heat of a substance is also known as __________________?

Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant_______________?

Isochoric process is one in which___________________?

Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant________________?

Energy can neither be created nor destroyed but can be converted from one form to other is inferred from_________________?

Entropy change depends on___________________?