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.

Wrought iron is________________?

A hard

B high in strength

C highly resistant to corrosion

D heat treated to change its properties

Review Detailed Answer

Correct Answer: highly resistant to corrosion

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

A allotropic change

B recrystallisation

C heat treatment

D precipitation

Review Detailed Answer

Correct Answer: allotropic change

Cast iron has_________________?

A high tensile strength

B its elastic limit close to the ultimate breaking strength

C high ductility

D all of the above

Review Detailed Answer

Correct Answer: its elastic limit close to the ultimate breaking strength

An important property of malleable cast iron in comparison to grey cast iron is the high___________________?

A compressive strength

B ductility

C carbon content

D hardness

Review Detailed Answer

Correct Answer: ductility

Carbon steel is_______________?

A made by adding carbon in steel

B refined from cast iron

C an alloy of iron and carbon with varying quantities of phosphorus and sulphur

D extensively used for making cutting tools

Review Detailed Answer

Correct Answer: an alloy of iron and carbon with varying quantities of phosphorus and sulphur

‘Killed steels’ are those steels__________________?

A which are destroyed by burning

B which after their destruction are recycled to produce fresh steel

C which are deoxidised in the ladle with silicon and aluminium

D in which carbon is completely burnt

Review Detailed Answer

Correct Answer: which are deoxidised in the ladle with silicon and aluminium

The most effective inhibitor of grain growth, when added in small quantities is__________________?

A carbon

B vanadium

C manganese

D cobalt

Review Detailed Answer

Correct Answer: vanadium

Maximum percentage of carbon in ferrite is___________________?

A 0.025%

B 0.06%

C 0.1%

D 0.25%

Review Detailed Answer

Correct Answer: 0.025%

Corrosion resistance of steel is increased by addition of________________?

A chromium and nickel

B sulphur, phosphorus, lead

C vanadium, aluminium

D tungsten, molybdenum, vanadium, chromium

Review Detailed Answer

Correct Answer: chromium and nickel

Railway rails are normally made of_______________?

A mild steel

B alloy steel

C high carbon

D tungsten steel

Review Detailed Answer

Correct Answer: high carbon

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Wrought iron is________________?

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

Cast iron has_________________?

An important property of malleable cast iron in comparison to grey cast iron is the high___________________?

Carbon steel is_______________?

‘Killed steels’ are those steels__________________?

The most effective inhibitor of grain growth, when added in small quantities is__________________?

Maximum percentage of carbon in ferrite is___________________?

Corrosion resistance of steel is increased by addition of________________?

Railway rails are normally made of_______________?