Vacuum Pressure and Temperature Relations Quiz

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Questions and Answers

What is the measure of the capability of a substance to dissipate power once its stored energy is utilized?

Energy

What is the energy stored in a moving body?

Kinetic Energy (KE)

Explain the temperature relation between Fahrenheit and Celsius.

Fahrenheit to Celsius

What is the pressure reading below atmospheric pressure or 'zero'?

Vacuum Pressure (𝑃𝑣𝑎𝑐) Signup and view all the answers

What is the absolute zero pressure also known as?

Perfect Vacuum Signup and view all the answers

What is the energy that a system possesses due to its elevation above some arbitrarily selected datum?

Potential Energy (PE) Signup and view all the answers

What is the importance of finding the initial value of internal energy when the unknown is the internal energy of the body?

To have a reference at absolute zero temperature where internal energy is almost zero. Signup and view all the answers

When the unknown is the flow work, why should we consider the absolute value of pressure?

We are in reference with absolute zero pressure/vacuum pressure where the flow work is zero. Signup and view all the answers

Describe the flow of heat energy in a thermodynamic system.

Heat energy flows from a higher potential body to a lower potential body. Signup and view all the answers

What types of devices are classified as steady-flow devices?

Turbines, compressors, and nozzles. Signup and view all the answers

Explain what is meant by steady-flow process.

A process during which a fluid flows through a control volume steadily. Signup and view all the answers

What is the key requirement for energy analysis of steady-flow systems?

Fluid properties at an inlet or exit must remain constant. Signup and view all the answers

Define entropy.

Measure of randomness of the molecules of a substance or measure the fraction of the total energy of a system that is not available for doing work. Signup and view all the answers

What does conservation of mass state?

The mass of a body is constant during its motion. Signup and view all the answers

What is mass flow rate?

The amount of mass flowing per unit time. Signup and view all the answers

Explain compressible flow system.

It means that the working substance passing through a thermodynamic system is subject to a change of bulkiness due to compression during steady flow processes. Signup and view all the answers