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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.

During throttling process___________________?

A heat exchange does not take place

B no work is done by expanding steam

C there is no change of internal energy of steam

D all of the above

Review Detailed Answer

Correct Answer: all of the above

Compressed air coming out from a punctured football___________________?

A becomes hotter

B becomes cooler1

C remains at the same temperature

D may become hotter or cooler depend-ing upon the humidity of the surround¬ing air

Review Detailed Answer

Correct Answer: becomes cooler1

An adiabatic wall is one which__________________?

A prevents thermal interaction

B permits thermal interaction

C encourages thermal interaction

D discourages thermal interaction

Review Detailed Answer

Correct Answer: prevents thermal interaction

In a Carnot cycle, heat is transferred at_______________________?

A constant pressure

B constant volume

C constant temperature

D constant enthaply

Review Detailed Answer

Correct Answer: constant temperature

An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is___________________?

A feasible

B impossible

C possible

D possible, but with lot of sophistications

Review Detailed Answer

Correct Answer: possible

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

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

During throttling process___________________?

Compressed air coming out from a punctured football___________________?

An adiabatic wall is one which__________________?

In a Carnot cycle, heat is transferred at_______________________?

An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is___________________?

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 __________________?