Pneumatic Principles & Air Flow Mechanics Flashcards
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What is the primary principle that enables a Casper pneumatic tube system to transport carriers through the network?
Answer: Pressure differential created by blowers or vacuum pumps
Pneumatic tube systems use pressure differentials — generated by blowers or vacuum pumps — to push or pull carriers through the tube network.
In a Casper pneumatic tube system, what mechanical device generates the airflow needed to move carriers?
Answer: A centrifugal blower or vacuum pump
Centrifugal blowers or vacuum pumps move large volumes of air to create the pressure differential that propels carriers through the tubing.
According to Bernoulli's principle, what happens to static air pressure inside a pneumatic tube as air velocity increases?
Answer: Static pressure decreases as velocity increases
Bernoulli's principle states that as fluid velocity increases, static pressure decreases — a fundamental relationship governing pneumatic tube airflow.
What unit is most commonly used to measure the vacuum level in a hospital-grade Casper pneumatic tube system?
Answer: Inches of mercury (in. Hg)
Vacuum level in pneumatic tube systems is typically expressed in inches of mercury (in. Hg), a standard unit for measuring negative pressure.
What is the typical operating vacuum range for a standard hospital Casper pneumatic tube system?
Answer: 4–8 inches of mercury
Hospital pneumatic tube systems typically operate at 4–8 inches of mercury, providing adequate force to move carriers efficiently without risking damage to fragile contents.
Which factor most directly determines carrier transit speed in a Casper pneumatic tube system?
Answer: The pressure differential across the carrier in the tube
The pressure differential across the carrier is the primary driving force; a greater differential results in greater acceleration and higher transit speed.
What is the primary function of a diverter valve in a Casper pneumatic tube network?
Answer: To route carriers from one tube branch to another at junctions
Diverter valves physically redirect carriers at junction points, enabling a single blower system to serve multiple destinations throughout the network.