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 in pig iron tends to make it___________________?

A hard’

B soft

C ductile

D tough

Review Detailed Answer

Correct Answer: hard’

The following types of materials are usually the most ductile__________________?

A face-centred cubic lattice

B body-centred cubic lattice

C hexagonal close-packed lattice

D all of the above

Review Detailed Answer

Correct Answer: face-centred cubic lattice

In grey cast iron, carbon is present in the form of____________________?

A cementite

B free carbon

C flakes

D spheroids

Review Detailed Answer

Correct Answer: flakes

The unique property of cast iron is its high ___________________?

A malleability

B ductility

C surface finish

D damping characteristics

Review Detailed Answer

Correct Answer: damping characteristics

The percentage of carbon in grey iron castings usually varies between __________________?

A 0.5 to 1%

B 1 – 2%

C 2.5 to 4.5%

D 5 – 7%

Review Detailed Answer

Correct Answer: 2.5 to 4.5%

For the allotropic forms of iron, the points of arrest are __________________?

A the points where no further change oc-curs

B constant for all metals

C the points where there is no further flow of metal

D the points of discontinuity

Review Detailed Answer

Correct Answer: the points of discontinuity

The crystal of alpha iron is ____________________?

A body centred cubic

B face centred cubic

C hexagonal close packed

D cubic structure

Review Detailed Answer

Correct Answer: body centred cubic

A reversible change in the atomic structure of steel with corresponding change in the properties is known as___________________?

A molecular change

B physical change

C allotropic change

D solidus change

Review Detailed Answer

Correct Answer: allotropic change

Ferromagnetic alpha iron exists in temperature range of________________?

A below 723°C

B 770 – 910°C

C 910-1440°C

D 1400-1539°C

Review Detailed Answer

Correct Answer: below 723°C

The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is _______________?

A 770°C

B 910°C

C 1050°C

D below recrystallisation temperature

Review Detailed Answer

Correct Answer: 770°C

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Sulphur in pig iron tends to make it___________________?

The following types of materials are usually the most ductile__________________?

In grey cast iron, carbon is present in the form of____________________?

The unique property of cast iron is its high ___________________?

The percentage of carbon in grey iron castings usually varies between __________________?

For the allotropic forms of iron, the points of arrest are __________________?

The crystal of alpha iron is ____________________?

A reversible change in the atomic structure of steel with corresponding change in the properties is known as___________________?

Ferromagnetic alpha iron exists in temperature range of________________?

The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is _______________?