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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.

Delta iron occurs at temperature of_______________?

A room temperature

B above melting point

C between 1400°C and 1539°C

D between 910°C and 1400°C

Review Detailed Answer

Correct Answer: between 1400°C and 1539°C

Super conduction by metals is observed in the temperature range of_________________?

A below 10°K

B above 100°K

C around 0°C

D around 100°C

Review Detailed Answer

Correct Answer: below 10°K

Which of the following represents the allotropic forms of iron__________________?

A alpha iron, beta iron and gamma iron

B alpha iron and beta iron

C body centred cubic a-iron and face centred cubic a-iron

D alpha iron, gamma from and delta iron

Review Detailed Answer

Correct Answer: alpha iron, gamma from and delta iron

Gamma iron exits at following temperature___________________?

A room temperature

B near melting point

C between 1400°C and 1539°C

D between 910°C and 1400°C

Review Detailed Answer

Correct Answer: between 910°C and 1400°C

Pure iron is the structure of_______________?

A ferrite

B pearlite

C anstenite

D ferrite and cementite

Review Detailed Answer

Correct Answer: ferrite

Cast iron is characterised by minimum of following %age of carbon_________________?

A 0.2%

B 0.8%

C 1.3%

D 2%

Review Detailed Answer

Correct Answer: 2%

The molecules in a solid move______________?

A in a random manner

B in a haphazard way

C in circular motion

D back and forth like tiny pendulums

Review Detailed Answer

Correct Answer: back and forth like tiny pendulums

Paramagnetic alpha iron changes to gamma iron at_______________?

A 770°C

B 910°C

C 1440°C

D 1539°C

Review Detailed Answer

Correct Answer: 910°C

The crystal structure of gamma iron is_________________?

A body centred cubic

B face centred cubic

C hexagonal close packed

D cubic structure

Review Detailed Answer

Correct Answer: face centred cubic

The metallic structure of mild steel is_________________?

A body centred cubic

B face centred cubic

C hexagonal close packed

D cubic structure

Review Detailed Answer

Correct Answer: body centred cubic

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Delta iron occurs at temperature of_______________?

Super conduction by metals is observed in the temperature range of_________________?

Which of the following represents the allotropic forms of iron__________________?

Gamma iron exits at following temperature___________________?

Pure iron is the structure of_______________?

Cast iron is characterised by minimum of following %age of carbon_________________?

The molecules in a solid move______________?

Paramagnetic alpha iron changes to gamma iron at_______________?

The crystal structure of gamma iron is_________________?

The metallic structure of mild steel is_________________?