Heat & Thermodynamics MCQs with Answers

Air can be liquefied by?

• A.High pressure and low temperature
• B.Low pressure and high temperature
• C.High pressure and high temperature
• D.Low pressure and low temperature

In Fahrenheit scale the freezing point of water is and boiling point of water is _ ?

• A.0°F, 100°F
• B.32°F, 212°F
• C.0°F, 212°F
• D.32°F, 100°F

The transfer of heat that occurs through direct contact is called ?

• A.Convection
• B.Radiation
• C.Conduction
• D.Evaporation

A man feels hot when he comes close to fire. Heat is transferred through?

• A.Conduction only
• B.Convection only
• C.Radiation only
• D.Both B and C

The value of triple point of water is given by _?

• A.373.16K
• B.273.15K
• C.273.16K
• D.0K

What happens to the molecules of a gas when the gas changes into a liquid?

• A.They move closer and lose energy
• B.They move farther apart and gain energy
• C.They remain at the same distance but lose energy
• D.They move closer and gain energy

What factors result in changing the state of matter?

• A.Temperature and Pressure
• B.Density and Volume
• C.Mass and Weight
• D.Humidity and Wind

A sphere, a cube and a thin circular plate, all made of the same material and having the same mass, are initially heated to a temperature of 3000°K. Which of these will cool fastest?

• A.Sphere
• B.Cube
• C.Thin circular plate
• D.All will cool at the same rate

What are different methods of heat transfer?

• A.Conduction, convection, radiation
• B.Conduction, induction, evaporation
• C.Convection, reflection, absorption
• D.Radiation, sublimation, diffusion

Density of an ideal gas can be calculated by the formula ?

• A.d = PR/MT
• B.d = RT/PM
• C.d = PM/RT
• D.d = PT/RM