Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
27 Cards in this Set
- Front
- Back
|
One of the laws of physics states that the mass of a closed system will remain constant.
|
Conservation of Mass
|
|
|
All changes must be accounted for as air flows from one point to another.
|
Conservation of Energy
|
|
|
Inside the diameter or dimension?
|
Duct Area
|
|
|
What is expressed as the Q or cubic feet per minute?
|
Air Flow Volume
|
|
|
What is potential energy of the ventilation system?
|
Static Pressure
|
|
|
What pressure is exerted by a fluid in motion?
|
Velocity Pressure
|
|
|
Which type of pressure carries the sign of SP (either positive or negative) and measures the energy content of the air stream?
|
Total Pressure
|
|
|
What dictates the Q system must pull (key parameters of the design)?
|
Capture Velocity
|
|
|
What is the measurement of air at the opening of a local exhaust capture hood?
|
Face Velocity
|
|
|
What is the amount of air required to keep a contaminant entrained throughout the system?
|
Transport Velocity
|
|
|
What term is defined as the air being drawn into the hood, which captures, contains, or controls the emission source?
|
Inlet
|
|
|
The_____carries the contaminant to the air cleaner and then to the outside environment.
|
Duct
|
|
|
The_______scrubs, seperates, removes, or filters the contaminant from the air.
|
Air Cleaner
|
|
|
The______generates static pressure and moves the air.
|
Fan
|
|
|
The______disperses the remaining air contaminants into the outside environment.
|
Outlet
|
|
|
One of the main components you need to calculate when determining the effectiveness of a ventilation system is the_________?
|
Duct Area
|
|
|
What is related to the average velocity and the flow cross-sectional are by Q=AV
|
Air Flow Volume components
|
|
|
There are various methods for moving air in a ventilation system, the fan is often called the______of the system?
|
Heart
|
|
|
Static pressure is the____________of the ventilation system?
|
Potential Energy
|
|
|
Velocity pressure is the pressure_______by air in motion.
|
Exerted
|
|
|
Total Pressure is simply the______of the static and velocity pressures at a given point in the duct.
|
Sum
|
|
|
Which pressure loss has to do with entry of air into the hood or opening?
|
Pressure loss
|
|
|
Four major factors contribute to__________: duct material, air velocity, duct diameter, and duct length.
|
Friction Loss
|
|
|
Air entering a duct suffers from a great deal of_______?
|
Turbulence
|
|
|
What is the point where the air stream diameter is at its smallest point?
|
Vena Contracta
|
|
|
Adequate make-up air is too often neglected when_________is considered.
|
Local Exhaust Ventilation
|
|
|
____________is critical to functioning of large- volume systems.
|
Make up Air
|
