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Engineering 2 Exam

10 questions for the Engineering Exam

QuestionAnswer
What is the difference between temperature and heat? Temperature is the measure of average energy in a substance (like hot or cold); Heat is the total molecular energy/total of thermal energy in a substance
What law states that entropy will ALWAYS increase over time and is NEVER negative? The 2nd law of Thermodynamics (Law of Entropy)
What are the two types of latent heat? Heat of Fusion, and Heat of Vaporization
What are the basic parts of a hydraulic system? They are the pump, the control system, and the actuator.
Gases and liquids both classify as fluids, but what is the difference between a gas and a liquid? Gases are COMPRESSIBLE; liquids are NOT
When is a vacuum created? When the air pressure is lower than the atmospheric pressure (Pa)
What are the steps of the carnot cycle? 1. Reversible isothermal expansion of a gas; 2. Reversible adiabetic expansion of a gas; 3. Reversible isothermal compression of a gas; 4. Isentropic expansion of a gas
Is is true that the pressure in a closed system is equal in all directions? True
Why does the liquid in a closed system move forward when the pressure increases? Air inside the closed system gets compressed and allows the liquid to move forward.
How many Newtons are in Atmospheric Pressure? There are 10,000 Newtons per square meter.
Created by: jennyxxfasho