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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 material fails below its yield point, failure would be due to___________________?

A straining

B fatigue

C creep

D sudden loading

Review Detailed Answer

Correct Answer: fatigue

Stress concentration in cyclic loading is____________________?

A very serious in brittle materials and less serious in ductile materials

B very serious in ductile materials and less serious in brittle materials

C equally serious in both types of materials

D seriousness would depend on other factors

Review Detailed Answer

Correct Answer: equally serious in both types of materials

Which of the following is not correct procedure to increase the fatigue limit_______________?

A cold working

B shot peening

C surface decarburisation

D under-stressing

Review Detailed Answer

Correct Answer: surface decarburisation

Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to________________?

A dynamic loading

B static loading

C combined static and dynamic loading

D completely reversed loading

Review Detailed Answer

Correct Answer: completely reversed loading

Stress concentration in static loading is more serious in__________________?

A ductile materials

B brittle materials

C equally serious in both cases

D depends on other factors

Review Detailed Answer

Correct Answer: brittle materials

The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be_________________?

A same in both cases

B 2 times more

C 3 times more

D 4 times more

Review Detailed Answer

Correct Answer: 3 times more

The endurance limit of a material with finished surface in comparison to rough surface is_________________?

A more

B less

C same

D more or less depending on quantum of load

Review Detailed Answer

Correct Answer: more

Brittle coating technique is used for_________________?

A determining brittleness

B protecting metal against corrosion

C protecting metal against wear and tear

D experimental stress analysis

Review Detailed Answer

Correct Answer: experimental stress analysis

Other method of reducing shock load in the above case can be_________________?

A to decrease length

B to increase length

C unaffected by length

D other factors would decide same

Review Detailed Answer

Correct Answer: to increase length

If an unsupported uniform cross sectional elastic bar is subjected to a longitudinal impact from a rigid bob moving with velocity v, then a compressive wave of intensity sc is propagated through the bar as follows______________________?

A vpE

B vVvF

C WpE/2

D IvHpE

Review Detailed Answer

Correct Answer: vpE

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

If a material fails below its yield point, failure would be due to___________________?

Stress concentration in cyclic loading is____________________?

Which of the following is not correct procedure to increase the fatigue limit_______________?

Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to________________?

Stress concentration in static loading is more serious in__________________?

The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be_________________?

The endurance limit of a material with finished surface in comparison to rough surface is_________________?

Brittle coating technique is used for_________________?

Other method of reducing shock load in the above case can be_________________?

If an unsupported uniform cross sectional elastic bar is subjected to a longitudinal impact from a rigid bob moving with velocity v, then a compressive wave of intensity sc is propagated through the bar as follows______________________?