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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.

Total emissivity of polished silver compared to black body is___________________?

A same

B higher

C more or less same

D very much lower

Review Detailed Answer

Correct Answer: very much lower

The value of the wavelength for maximum emissive power is given by ___________________?

A Wien’s law

B Planck’s law

C Stefan’s law

D Fourier’s law

Review Detailed Answer

Correct Answer: Wien’s law

The unit of overall coefficient of heat transfer is___________________?

A kcal/m2

B kcal/hr °C

C kcal/m2 hr °C

D kacl/m hr °C

Review Detailed Answer

Correct Answer: kcal/m2

All radiations in a black body are___________________?

A reflected

B refracted

C transmitted

D absorbed

Review Detailed Answer

Correct Answer: absorbed

According to Kirchoff’s law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a _________________?

A grey body

B brilliant white polished body

C red hot body

D black body

Review Detailed Answer

Correct Answer: black body

The size of inlet valve of.an engine in comparison to exhaust valve is_________________?

A more

B less

C same

D more/less depending on capacity of engine

Review Detailed Answer

Correct Answer: less

The specific fuel consumption of a petrol engine compared to diesel engine of same H.P. is_______________?

A same

B more

C less

D less or more depending on operating conditions

Review Detailed Answer

Correct Answer: more

Engine pistons ‘are usually made of aluminium alloy because it_________________?

A is lighter

B wears less

C absorbs shocks

D is stronger

Review Detailed Answer

Correct Answer: is lighter

In diesel engine, the compression ratio in comparison to expansion ratio is_______________?

A same

B less

C more

D variable

Review Detailed Answer

Correct Answer: more

Polymerisation is a chemical process in which molecules of a compound become________________?

A larger

B slowed down

C smaller

D liquid

Review Detailed Answer

Correct Answer: larger

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Total emissivity of polished silver compared to black body is___________________?

The value of the wavelength for maximum emissive power is given by ___________________?

The unit of overall coefficient of heat transfer is___________________?

All radiations in a black body are___________________?

According to Kirchoff’s law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a _________________?

The size of inlet valve of.an engine in comparison to exhaust valve is_________________?

The specific fuel consumption of a petrol engine compared to diesel engine of same H.P. is_______________?

Engine pistons ‘are usually made of aluminium alloy because it_________________?

In diesel engine, the compression ratio in comparison to expansion ratio is_______________?

Polymerisation is a chemical process in which molecules of a compound become________________?