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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.

Fuel consumption with increase in back pressure will________________?

A increase

B decrease

C remain unaffected

D depend on other factors

Review Detailed Answer

Correct Answer: increase

The ash content in diesel oil should bot be more than_______________?

A 1%

B 5%

C 0.1%

D 0.01%

Review Detailed Answer

Correct Answer: 1%

A fuel will detonate less if it has___________________?

A higher self ignition temperature

B lower self ignition temperature

C proper self ignition temperature

D self ingition temperature has nothing to do with detonation

Review Detailed Answer

Correct Answer: higher self ignition temperature

Pick up the wrong statement about supercharging __________________?

A supercharging reduces knocking in diesel engines

B there can be limited supercharging in petrol engines because of detonation

C supercharging at high altitudes is essential

D supercharging results in fuel economy

Review Detailed Answer

Correct Answer: supercharging results in fuel economy

Which of the following statements is correct ?

A All the irreversible engines have same efficiency

B All the reversible engines have same efficiency

C Both Rankine and Caront cycles have same efficiency between same temperature limits

D All reversible engines working between same temperature limits have same-efficiency

Review Detailed Answer

Correct Answer: All reversible engines working between same temperature limits have same-efficiency

Sulphur content in diesel oil should not be more than_________________?

A 10%

B 5%

C 1%

D 0.1%

Review Detailed Answer

Correct Answer: 1%

The efficiency of I.C. engines normally is of the order of_________________?

A 15-20%

B 20-25%

C 25-30%

D 30-35%

Review Detailed Answer

Correct Answer: 30-35%

The m.e.p. of a diesel cycle having fixed compression ratio with increase in cut-off will_________________?

A increase

B decreae

C be unaffected

D depend on other factors

Review Detailed Answer

Correct Answer: increase

Detonation can be controlled by_____________________?

A varying compression ratio

B using lian mixture

C retarding the spark timing

D reducing the r.p.m.

Review Detailed Answer

Correct Answer: retarding the spark timing

The specific gravity of diesel oil Is_________________?

A 1

B 0.7

C 0.85

D 0.5

Review Detailed Answer

Correct Answer: 0.85

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Fuel consumption with increase in back pressure will________________?

The ash content in diesel oil should bot be more than_______________?

A fuel will detonate less if it has___________________?

Pick up the wrong statement about supercharging __________________?

Which of the following statements is correct ?

Sulphur content in diesel oil should not be more than_________________?

The efficiency of I.C. engines normally is of the order of_________________?

The m.e.p. of a diesel cycle having fixed compression ratio with increase in cut-off will_________________?

Detonation can be controlled by_____________________?

The specific gravity of diesel oil Is_________________?