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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 a system after undergoing a series of processes, returns to the initial state then__________________?

A process is thermodynamically in equilibrium

B process is executed in closed system cycle

C its entropy will change due to irreversibility

D sum of heat and work transfer will be zero

Review Detailed Answer

Correct Answer: sum of heat and work transfer will be zero

Carnot cycle efficiency depends upon________________?

A properties of the medium/substance used

B condition of engine

C working condition

D temperature range of operation

Review Detailed Answer

Correct Answer: temperature range of operation

An engine operates between temperatures of 900°Kandr2 and another engine between T2 and 400°K For both to do equal work, value of T2 will be________________?

A 650°K

B 600°K

C 625°K

D 700°K

Review Detailed Answer

Correct Answer: 650°K

A manufacturer claims to have a heat engine capable of developing 20 h.p. by receiving heat input of 400 kcal/mt and working between the temperature limits of 227° C and 27° C. His claim is__________________?

A justified

B not possible

C may be possible with lot of sophistications

D cost will be very high

Review Detailed Answer

Correct Answer: not possible

A diathermic 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: permits thermal interaction

Water contained in a beaker can be made to boil by passing steam through it__________________?

A at atmospheric pressure

B at a pressure below the firuosphejric pressure

C at a pressure greater than atmospheric pressure

D any pressure

Review Detailed Answer

Correct Answer: at a pressure greater than atmospheric pressure

The energy of molecular motion appears as________________?

A heat

B potential energy

C surface tension

D friction

Review Detailed Answer

Correct Answer: heat

The unit’of universal gas constant is___________________?

A watts/°K

B dynes/°C

C ergscm/°K

D erg/°K

Review Detailed Answer

Correct Answer: erg/°K

I kgf/cm2 is equal to________________?

A 760 mm Hg

B zero mm Hg

C 735.6 mm Hg

D 1 mm Hg

Review Detailed Answer

Correct Answer: 735.6 mm Hg

One barometric pressure or 1 atmospheric pressure is equal to___________________?

A 1 kgf/cnr2

B 1.033 kgf/cm2

C 0 kgf/cm2

D 1.0197 kgf/cm2

Review Detailed Answer

Correct Answer: 1.033 kgf/cm2

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

If a system after undergoing a series of processes, returns to the initial state then__________________?

Carnot cycle efficiency depends upon________________?

An engine operates between temperatures of 900°Kandr2 and another engine between T2 and 400°K For both to do equal work, value of T2 will be________________?

A manufacturer claims to have a heat engine capable of developing 20 h.p. by receiving heat input of 400 kcal/mt and working between the temperature limits of 227° C and 27° C. His claim is__________________?

A diathermic wall is one which____________________?

Water contained in a beaker can be made to boil by passing steam through it__________________?

The energy of molecular motion appears as________________?

The unit’of universal gas constant is___________________?

I kgf/cm2 is equal to________________?

One barometric pressure or 1 atmospheric pressure is equal to___________________?