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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 surface hardness of the following order is achieved by nitriding operation__________________?

A 600 VPN

B 1500 VPN

C 1000 to 1100 VPN

D 250 VPN

Review Detailed Answer

Correct Answer: 1000 to 1100 VPN

Hardness of upper bainite (acicular structure) is about___________________?

A RC 65

B RC 48

C RC 57

D RC 80

Review Detailed Answer

Correct Answer: RC 48

Brass (alloy of copper and zinc) is an example of__________________?

A substitutional solid solution

B interstitial solid solution

C intermetallic compounds

D all of the above

Review Detailed Answer

Correct Answer: substitutional solid solution

Which is false statement about normalizing. Normalizing is done to _________________?

A refine grain structure

B reduce segregation in casting

C improve mechanical properties

D induce stresses-

Review Detailed Answer

Correct Answer: induce stresses-

Amorphous material is one___________________?

A in which atoms align themselves in a geometric pattern upon solidification

B in which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid

C which is not attacked by phosphorous

D which emits fumes on melting

Review Detailed Answer

Correct Answer: in which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid

An example of amorphous material is____________?

A zinc

B lead

C silver

D glass

Review Detailed Answer

Correct Answer: glass

Which is false statement about case hardening. Case hardening is done by_______________?

A electroplating

B cyaniding

C induction hardening

D nitriding

Review Detailed Answer

Correct Answer: electroplating

Chromium in steel_________________?

A improves wear resistance, cutting ability and toughness

B refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties

C improves cutting ability and reduces hardenability

D gives ductility, toughness, tensile strength and anticorrosion properties

Review Detailed Answer

Correct Answer: improves wear resistance, cutting ability and toughness

Cemented carbide tools are not found to be suitable for cutting_______________?

A brass

B cast iron

C aluminium

D steel

Review Detailed Answer

Correct Answer: steel

Which of the following is the binding material in cemented carbides___________________?

A cobalt

B nickel

C vanadium

D iron

Review Detailed Answer

Correct Answer: cobalt

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

The surface hardness of the following order is achieved by nitriding operation__________________?

Hardness of upper bainite (acicular structure) is about___________________?

Brass (alloy of copper and zinc) is an example of__________________?

Which is false statement about normalizing. Normalizing is done to _________________?

Amorphous material is one___________________?

An example of amorphous material is____________?

Which is false statement about case hardening. Case hardening is done by_______________?

Chromium in steel_________________?

Cemented carbide tools are not found to be suitable for cutting_______________?

Which of the following is the binding material in cemented carbides___________________?