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.

All the four operations in two stroke engine are performed in following number of revolutions of crank shaft______________________?

A Half

B One

C Two

D Four

Review Detailed Answer

Correct Answer: One

As the number of cylinders in multi-cylinder engine increases, the power to weight ratio_______________?

A Decreases

B Increases

C Remains same

D Decreases upto a limit and then increases

Review Detailed Answer

Correct Answer: Decreases

The termal efficiency of a petrol engine at design load is around_________________?

A 90%

B 50%

C 40%

D 30%

Review Detailed Answer

Correct Answer: 30%

Method of governing used in petrol engine is________________?

A quantity governing

B quality governing

C combined governing

D partial governing

Review Detailed Answer

Correct Answer: quantity governing

Method of governing used in diesel engine is__________________?

A quantity governing

B quality governing

C combined governing

D partial governing

Review Detailed Answer

Correct Answer: quality governing

In isochronous governing, speed droop is_______________?

A 100%

B 50%

C 30%

Review Detailed Answer

Correct Answer: 30%

An engine has a normal speed of 960 r.p.m. and no load speed of 1000 r.p.m. The speed droop of governor will be about___________________?

A 2%

B 4%

C 8%

D ±4%

Review Detailed Answer

Correct Answer: 4%

If diesel is fed by mistake in the oil tank of a petrol engien, then engine will________________?

A give lot of smoke

B detonate

C knock

D not run

Review Detailed Answer

Correct Answer: not run

For the same size and weight, a two stroke engine as compared to four stroke engine will generate power_________________?

A about twice

B about 0.5 times

C nearly equal

D about 1.7 times

Review Detailed Answer

Correct Answer: about 1.7 times

For low load operation, more suitable (economical) engine is_______________?

A S.I. engine

B C.I. engine

C both are equally good

D multicylinder engine

Review Detailed Answer

Correct Answer: C.I. engine

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

All the four operations in two stroke engine are performed in following number of revolutions of crank shaft______________________?

As the number of cylinders in multi-cylinder engine increases, the power to weight ratio_______________?

The termal efficiency of a petrol engine at design load is around_________________?

Method of governing used in petrol engine is________________?

Method of governing used in diesel engine is__________________?

In isochronous governing, speed droop is_______________?

An engine has a normal speed of 960 r.p.m. and no load speed of 1000 r.p.m. The speed droop of governor will be about___________________?

If diesel is fed by mistake in the oil tank of a petrol engien, then engine will________________?

For the same size and weight, a two stroke engine as compared to four stroke engine will generate power_________________?

For low load operation, more suitable (economical) engine is_______________?