
Exploring Thermal Engineering Concepts
Authored by HOD MECH FX POLY
Engineering
12th Grade
Used 1+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first law of thermodynamics?
The total energy in a closed system is always zero.
Heat is always converted to work: Q = W.
Energy conservation principle: ΔU = Q - W.
Energy cannot be created or destroyed: E = mc².
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Define thermal efficiency in the context of engines.
Thermal efficiency is the amount of fuel consumed by an engine.
Thermal efficiency is the ratio of work output to heat input in an engine.
Thermal efficiency is the total energy output of an engine.
Thermal efficiency measures the temperature of the engine components.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the difference between an open and closed system?
Both open and closed systems exchange matter but not energy.
An open system only exchanges energy; a closed system exchanges matter and energy.
An open system is completely isolated; a closed system can exchange matter.
An open system exchanges matter and energy; a closed system exchanges only energy.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the concept of heat transfer by conduction.
Heat transfer by conduction occurs only in liquids.
Conduction involves the movement of heat through radiation.
Heat transfer by conduction requires a vacuum to occur.
Heat transfer by conduction is the transfer of thermal energy through direct contact between materials, involving particle collisions and energy transfer.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the Carnot cycle and its significance?
The Carnot cycle is a type of refrigeration cycle used in air conditioning systems.
The Carnot cycle is a method for calculating fuel efficiency in vehicles.
The Carnot cycle is a practical engine design used in modern cars.
The Carnot cycle is a theoretical thermodynamic cycle that defines the maximum efficiency of a heat engine.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Describe the role of a heat exchanger in thermal systems.
A heat exchanger is used to store thermal energy for later use.
A heat exchanger generates electricity from thermal energy.
A heat exchanger transfers thermal energy between fluids to regulate temperature in thermal systems.
A heat exchanger cools fluids without transferring heat.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the main types of thermodynamic processes?
Cyclic, Isothermal, Isobaric
Reversible, Irreversible, Isochoric
Constant Volume, Constant Pressure, Constant Temperature
Isothermal, Adiabatic, Isobaric, Isochoric
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