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WorksheetsT-Level Eng - Science - Thermodynamics Quiz
Total questions: 30
Worksheet time: 15mins
Which statement best defines thermal conduction?
Heat transfer via bulk movement of fluids
Heat transfer by emission of electromagnetic waves
Heat transfer through particle-to-particle interaction within a material
Heat transfer caused by pressure changes only
Which material would generally have the highest thermal conductivity?
Air
Timber
Copper
PVC
Which situation is dominated by natural convection?
Heat loss through a metal rod
A heater warming still air in a closed room
Heat from the Sun to the Earth
Cooling by a fan-driven airflow
Which of the following is the main mechanism of heat transfer in a vacuum?
Conduction
Convection
Radiation
Evaporation
Which factor has the greatest effect on radiative heat transfer?
Temperature difference squared
Mass of material
Surface emissivity
Linear expansion coefficient
A material with a high specific heat capacity will:
Heat up quickly with little energy
Require large amounts of energy to change temperature
Melt at a very low temperature
Have poor thermal stability
Which equation correctly calculates the energy to raise temperature?
Q=mL
Q=mcΔT
Q=pV
Q=Fd
Latent heat refers to:
Heat added causing temperature increase
Heat lost during convection
Energy required to change state at constant temperature
Energy absorbed only during gas compression
What energy is required to heat 5 kg of steel from 20°C to 800°C? (c = 420 J kg−1K−1)
0.84 MJ
1.64 MJ
3.74 MJ
5.12 MJ
How much energy is needed to melt 4 kg of aluminium with a specific latent heat of fusion of 9130 kJ kg⁻¹?
9.13 MJ
18.26 MJ
36.52 MJ
52.80 MJ
Linear expansion is proportional to:
Heat capacity only
Temperature change and original length
Density and pressure
Volume and emissivity
Which equation represents linear thermal expansion?
ΔL=αVΔT
ΔL=mαΔT
ΔL=L₀αΔT
ΔL=αΔTL₀
A steel bar (α = 16×10⁻⁶ K⁻¹) lengthens from 15.00 m at 12°C to 240°C. What is ΔL?
0.034 m
0.0547 m2
0.0547 mm
0.0547 m
Thermal expansion is generally greatest in:
Ceramics
Polymers
Steels
Glass
Brass has α ≈ 20×10⁻⁶ K⁻¹. A 500 mm bar becomes 505 mm. What temperature change caused this?
~20°C
~50°C
~500°C
~2000°C
Boyle's Law can be expressed as:
PT=k
T/P=k
PV=k
T/V=k
Charles’ Law states that:
Pressure is proportional to volume
Volume is proportional to temperature at constant pressure
Temperature is proportional to pressure at constant mass
Density is proportional to temperature
A pneumatic cylinder exerts 0.9 kN on an area of 600 mm². What is the pressure?
0.5 bar
1.5 bar
2.5 bar
1.5 MPa → 15 bar
3.6 m³ of gas at 27°C is compressed to 2.4 m³ at constant pressure. What is the new temperature?
18°C
180°C
200 K
180 K
A gas at 1 bar and 0.3 m³ is compressed to 60 bar. What is the new volume?
0.003 m³
0.005 m³
0.03 m³
0.5 m³
Which of the following is a correct statement of the First Law of Thermodynamics?
Heat flows naturally from cold to hot
Energy cannot be created or destroyed
Entropy decreases in all processes
Work is independent of energy exchange
Internal energy refers to:
Stored gravitational potential energy only
Energy stored in atomic/molecular motion
Energy transferred only through radiation
Work done by expansion only
In a closed system, which quantity remains constant?
Mass
Temperature
Pressure
Internal energy
Which process occurs at constant temperature?
Isochoric
Isobaric
Isothermal
Adiabatic
An adiabatic process is one where:
Pressure is constant
No heat enters or leaves the system
Temperature stays constant
Work done is zero
What is the correct formula for the work done by a gas expanding at constant pressure?
W=PΔT
W=mcΔT
W=PΔV
W=PV/T
A system receives 500 kJ of heat and does 200 kJ of work. What is the change in internal energy?
−300 kJ
+300 kJ
+700 kJ
−700 kJ
Which state change involves the greatest latent heat for most engineering materials?
Solid → liquid
Liquid → gas
Gas → liquid
Solid → gas
A steel part at 150°C cools to 30°C. If c = 480 J kg⁻¹°C⁻¹ and mass is 3 kg, how much heat is lost?
0.17 MJ
0.35 MJ
0.52 MJ
0.96 MJ
A gas at 300 K is heated to 450 K while its volume increases from 0.4 m³ to 0.6 m³. Which law relates temperature and volume?
Boyle’s
Charles’
Pascal’s
Dalton’s
