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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.

The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of__________________?

A forces

B independence of forces

C dependence of forces

D balance of force

Review Detailed Answer

Correct Answer: forces

If two equal forces of magnitude P act at an angle 9°, their resultant will be________________?

A P/2 cos 9/2

B IP sin 9/2

C 2P tan 9/2

D IP cos 9/2

Review Detailed Answer

Correct Answer: IP cos 9/2

The unit of power in S.I. units is______________?

A newton meter

B watt

C joule

D kilogram meter/sec

Review Detailed Answer

Correct Answer: watt

The ultimate tensile strength of low carbon steel by working at a high strain rate will_________________?

A decrease

B increase

C remain constant

D first increase and then decrease

Review Detailed Answer

Correct Answer: increase

Ductility of a material can be defined as__________________?

A ability to undergo large permanent deformations in compression

B ability to recover its original form

C ability to undergo large permanent deformations in tension

D all of the above

Review Detailed Answer

Correct Answer: ability to undergo large permanent deformations in tension

In compression, a prism of brittle material will break________________?

A by forming a bulge (l>) by shearing along oblique plane

B in direction perpendicular to application of load

C by crushing into thousands of pieces

D none of the above

Review Detailed Answer

Correct Answer: by forming a bulge (l>) by shearing along oblique plane

Slow plastic defomiation of metals under a constant stress is known as________________?

A creep

B fatigue

C endurance

D plastic deformation

Review Detailed Answer

Correct Answer: creep

The number of electrons in 1 cm3 of metal would be of the order of_______________?

A 1010

B TO16

C 1022

D 1040

Review Detailed Answer

Correct Answer: 1022

The elastic stress strain behaviour of rubber is_____________________?

A linear

B non-linear

C plastic

D no fixed relationship

Review Detailed Answer

Correct Answer: linear

Recrystallization temperature is one________________?

A at which crystals first start forming from molten metal when it is cooled

B at which new spherical crystals first begin to form from the old deformed one when a strained metal is heated

C at which change of allotropic form takes place

D at which crystals grow bigger in size

Review Detailed Answer

Correct Answer: at which new spherical crystals first begin to form from the old deformed one when a strained metal is heated

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of__________________?

If two equal forces of magnitude P act at an angle 9°, their resultant will be________________?

The unit of power in S.I. units is______________?

The ultimate tensile strength of low carbon steel by working at a high strain rate will_________________?

Ductility of a material can be defined as__________________?

In compression, a prism of brittle material will break________________?

Slow plastic defomiation of metals under a constant stress is known as________________?

The number of electrons in 1 cm3 of metal would be of the order of_______________?

The elastic stress strain behaviour of rubber is_____________________?

Recrystallization temperature is one________________?