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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 heat is the heat required to__________________?

A change vapour into liquid

B change liquid into vapour

C increase the temperature of a liquid or vapour

D convert water into steam and superheat it

Review Detailed Answer

Correct Answer: convert water into steam and superheat it

Thermal conductivity of air with rise in temperature__________________?

A increases

B decreases

C remains constant

D may increase or decrease depending on temperature

Review Detailed Answer

Correct Answer: increases

Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of__________________?

A 0.002

B 0.02

C 0.01

D 0.1

Review Detailed Answer

Correct Answer: 0.02

Cork is a good insulator because it has___________________?

A free electrons

B atoms colliding frequency

C low density

D porous body

Review Detailed Answer

Correct Answer: porous body

Metals are good conductors of heat because________________?

A their atoms collide frequently

B their atoms-are relatively far apart

C they contain free electrons

D they have high density

Review Detailed Answer

Correct Answer: their atoms collide frequently

Temperature of steam at around 540°C can be measured by ____________________?

A thermometer

B radiatiouv pyrometer

C thermistor

D thermocouple

Review Detailed Answer

Correct Answer: thermocouple

Thermal conductivity of water in general with rise in temperature ____________________?

A increases

B decreases

C remains constant

D may increase or decrease depending on temperature

Review Detailed Answer

Correct Answer: may increase or decrease depending on temperature

Which of the following is the case of heat transfer by radiation ___________________?

A blast furnace

B heating of building

C cooling of parts in furnace

D heat received by a person from fireplace

Review Detailed Answer

Correct Answer: heat received by a person from fireplace

Heat transfer in liquid and gases takes place by_____________________?

A conduction

B convection

C radiation

D conduction and convection

Review Detailed Answer

Correct Answer: convection

When heat is Transferred by molecular collision, it is referred to as heat transfer by __________________?

A conduction

B convection

C radiation

D scattering

Review Detailed Answer

Correct Answer: convection

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Total heat is the heat required to__________________?

Thermal conductivity of air with rise in temperature__________________?

Thermal conductivity of air at room temperature in kcal/m hr °C is of the order of__________________?

Cork is a good insulator because it has___________________?

Metals are good conductors of heat because________________?

Temperature of steam at around 540°C can be measured by ____________________?

Thermal conductivity of water in general with rise in temperature ____________________?

Which of the following is the case of heat transfer by radiation ___________________?

Heat transfer in liquid and gases takes place by_____________________?

When heat is Transferred by molecular collision, it is referred to as heat transfer by __________________?