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 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

Which is false statement about annealing. Annealing is done to________________?

A relieve stresses

B harden steel slightly

C improve machining characteristic

D soften material

Review Detailed Answer

Correct Answer: harden steel slightly

Carbon in iron is an example of__________________?

A substitutional solution

B interstitial solid solution

C intermetallic compounds

D all of the above

Review Detailed Answer

Correct Answer: interstitial solid solution

Materials after cold working are subjected to following process to relieve stresses__________________?

A hot working

B tempering

C normalising

D annealing

Review Detailed Answer

Correct Answer: annealing

Hardness of martensite is about___________________?

A RC 65

B RC 48

C RC 57

D RC 80

Review Detailed Answer

Correct Answer: RC 65

Process of austempering results in__________________?

A formation of bainite structure

B carburised structure

C martenistic structure

D lamellar layers of carbide distributed throughout the structure

Review Detailed Answer

Correct Answer: formation of bainite structure

Induction hardening is the process of_____________________?

A hardening surface of workpiece to ob-tain hard and wear resistant surface

B heating and cooling rapidly

C increasing hardness throughout

D inducing hardness by continuous process

Review Detailed Answer

Correct Answer: hardening surface of workpiece to ob-tain hard and wear resistant surface

Solder is an alloy consisting of________________?

A tin, antimony, copper

B tin and copper

C tin and lead

D lead and zinc

Review Detailed Answer

Correct Answer: tin and copper

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

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

Vanadium in high speed steels__________________?

Hardness of lower bainite (tempered martensite) is about________________?

Which is false statement about annealing. Annealing is done to________________?

Carbon in iron is an example of__________________?

Materials after cold working are subjected to following process to relieve stresses__________________?

Hardness of martensite is about___________________?

Process of austempering results in__________________?

Induction hardening is the process of_____________________?

Solder is an alloy consisting of________________?