- 1. Thermal engineering is a branch of engineering that deals with the study of heat transfer and energy conversion between different mediums and systems. It encompasses the design, development, and optimization of systems that involve the movement of thermal energy, such as heating, cooling, and refrigeration systems. Thermal engineers work to improve the efficiency, performance, and sustainability of these systems by applying principles of thermodynamics, fluid mechanics, and heat transfer. They play a crucial role in various industries, including aerospace, automotive, energy production, and manufacturing, by ensuring that thermal processes are designed and controlled effectively to meet specific requirements and standards.
What is the unit of heat transfer rate?
A) Kelvin (K)
B) Joule (J)
C) Celsius (°C)
D) Watt (W)
- 2. What is the symbol for the thermal efficiency of a system?
A) Square root symbol: √
B) Pi symbol: π
C) η
D) Altitude symbol: ∆
- 3. What is specific heat capacity a measure of?
A) Thermal conductivity of a material
B) Amount of heat required to change a substance from solid to liquid
C) Maximum temperature a substance can reach before combustion
D) Amount of heat needed to raise the temperature of a substance by 1 degree Celsius
- 4. The Stefan-Boltzmann Law describes the power emitted by a ___ body.
A) Transparent
B) Reflective
C) White
D) Black
- 5. What is the ideal gas law equation?
A) E = mc2
B) PV = nRT
C) F = ma
D) V = IR
- 6. What is the term for the transfer of heat through a material by molecular activity?
A) Convection
B) Absorption
C) Radiation
D) Conduction
- 7. Which law states that the entropy of an isolated system never decreases?
A) Zeroth Law of Thermodynamics
B) First Law of Thermodynamics
C) Third Law of Thermodynamics
D) Second Law of Thermodynamics
- 8. What is heat capacity the measure of?
A) The maximum temperature a substance can reach before combustion
B) The ability of a material to conduct heat
C) The ability of a material to store heat
D) The amount of heat needed to raise the temperature of a substance by 1 degree Celsius
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