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.

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

The most popular firing order in case of four cylinder in-line I.C. engine is__________________?

A 1-2-3-4

B 1-3-2-4

C 1-4-2-3

D 1-2-4-3

Review Detailed Answer

Correct Answer: 1-3-2-4

Freezing temperature of petrol is usually__________________?

A 0°C

B – 10°C

C 10°C

D less than – 30°C

Review Detailed Answer

Correct Answer: 0°C

The compression ratio of motor cars is___________________?

A 5

B 7

C 10

D 13

Review Detailed Answer

Correct Answer: 7

Ignition quality of diesel-fuel oil is expressed by an index called__________________?

A octane number

B cetane number

C calorific value

D carbon content

Review Detailed Answer

Correct Answer: cetane number

The ignition of charge by some hot surface in the engine cylinder before operation of spark plug is known as________________?

A auto ignition

B preignition

C retarded ignition

D accelerated ignition

Review Detailed Answer

Correct Answer: preignition

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

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_________________?

The most popular firing order in case of four cylinder in-line I.C. engine is__________________?

Freezing temperature of petrol is usually__________________?

The compression ratio of motor cars is___________________?

Ignition quality of diesel-fuel oil is expressed by an index called__________________?

The ignition of charge by some hot surface in the engine cylinder before operation of spark plug is known as________________?