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.

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

Which is false statement about tempering. Tempering is done to_______________?

A improve machinability

B improve ductility

C improve toughness

D release stresses

Review Detailed Answer

Correct Answer: improve machinability

Vanadium in high speed steels__________________?

A promotes decarburisation

B provides high hot hardness

C forms very hard carbides and thus in-creases wear resistance

D promotes retention of austenite

Review Detailed Answer

Correct Answer: forms very hard carbides and thus in-creases wear resistance

Hardness of lower bainite (tempered martensite) is about________________?

A RC 65

B RC 48

C RC 57

D RC 80

Review Detailed Answer

Correct Answer: RC 57

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

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___________________?

Which is false statement about tempering. Tempering is done to_______________?

Vanadium in high speed steels__________________?

Hardness of lower bainite (tempered martensite) is about________________?