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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.

Large forgings, crank shafts, axles normally contain carbon up to________________?

A 0.05 to 0.20%

B 0.20 to 0.45%

C 0.45 to 0.55%

D 0.55 to 1.0%

Review Detailed Answer

Correct Answer: 0.45 to 0.55%

Cold rolled steel sheets contain carbon of the following order___________________?

A 0.1%

B 0.2%

C 0.4%

D 0.6%

Review Detailed Answer

Correct Answer: 0.1%

Which of the following element results in presence of free graphite in C.I_________________?

A carbon

B sulphur

C silicon

D manganese

Review Detailed Answer

Correct Answer: silicon

The machinability of steel is increased by___________________?

A silicon and sulphur

B phosphorous, lead and sulphur

C sulphur, graphite and aluminium

D phosphorous and aluminium

Review Detailed Answer

Correct Answer: phosphorous, lead and sulphur

Blast furnace produces following by reduction of iron ore_______________?

A cast iron

B pig iron

C wrought iron

D malleable iron

Review Detailed Answer

Correct Answer: pig iron

Melting point of iron is__________________?

A 1539°C

B 1601°C

C 1489°C

D 1712°C

Review Detailed Answer

Correct Answer: 1539°C

Which of the following elements does not impart hardness to steel__________________?

A copper

B chromium

C nickel

D silicon

Review Detailed Answer

Correct Answer: copper

The hardness of steel increases if it contains____________________?

A austenite

B martensite

C pearlite

D cementite

Review Detailed Answer

Correct Answer: martensite

Cobalt in steel __________________?

A improves wear resistance, cuttinability and toughness

B refines grain size and produces les tendency to carburisation, improve corrosion and heat resistant proper ties

C improves cutting ability and reduce hardenability

D gives ductility, toughness, tensile strength and anti corrosion property:

Review Detailed Answer

Correct Answer: improves cutting ability and reduce hardenability

Tensile strength of steel can be safely in-creased by________________?

A adding carbon up to 2.8%

B adding carbon up to 6.3%

C adding carbon up to 0.83%

D adding small quantities of copper

Review Detailed Answer

Correct Answer: adding carbon up to 0.83%

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Large forgings, crank shafts, axles normally contain carbon up to________________?

Cold rolled steel sheets contain carbon of the following order___________________?

Which of the following element results in presence of free graphite in C.I_________________?

The machinability of steel is increased by___________________?

Blast furnace produces following by reduction of iron ore_______________?

Melting point of iron is__________________?

Which of the following elements does not impart hardness to steel__________________?

The hardness of steel increases if it contains____________________?

Cobalt in steel __________________?

Tensile strength of steel can be safely in-creased by________________?