Heat & Thermodynamics MCQs with Answers

The maintenance of body temperature within suitable limits is called?

• A.Thermoregulation
• B.Osmoregulation
• C.Homeostasis
• D.Metabolism

The energy value up to which all energy states are full at absolute zero (0K) and above which all states are empty is known as _?

• A.Binding energy
• B.Fermi energy
• C.Ionization energy
• D.Threshold energy

Which law of thermodynamics states that the entropy of an isolated system always increases over time?

• A.First Law of Thermodynamics
• B.Second Law of Thermodynamics
• C.Third Law of Thermodynamics
• D.Zeroth Law of Thermodynamics

Cracks on roads occur due to ?

• A.Thermal expansion
• B.Thermal contraction
• C.Both expansion and contraction
• D.All of these

What is Boyle's Law formula?

• A.P × T = constant
• B.V/T = constant
• C.P/T = constant
• D.P × V = constant

Which substance is commonly used as a coolant in nuclear reactors?

• A.Water
• B.Liquid nitrogen
• C.Mercury
• D.Liquid sodium

Which statement is incorrect about particles in liquids?

• A.Particles are in constant random motion
• B.Particles can slide past one another
• C.Particles are held together by intermolecular forces
• D.Particles have large empty spaces between them

The number of spark plugs needed in a diesel engine is ?

• A.One
• B.Two
• C.Four
• D.Zero

The melting of ice is an example of ?

• A.Physical change
• B.Chemical change
• C.Nuclear change
• D.Both physical and chemical change

What is the temperature of a dead human body on the Celsius scale?

• A.37°C
• B.0°C
• C.According to the temperature around the body
• D.4°C