CCT Pneumatic Principles & Air Flow Mechanics 3

Question 1

What is the primary cause of pressure loss in long Casper pneumatic tube runs?

Accepted Answer

Friction between the moving airstream and the interior tube wall surface

Answer

Carrier weight accumulating over the distance traveled

Answer

Electrical resistance in the embedded tube sensors causing back-pressure

Answer

Gravity pulling the carrier downward against the airflow direction

Question 2

According to the continuity principle, how does increasing tube diameter affect air velocity when blower output (CFM) is constant?

Accepted Answer

Velocity decreases because the same air volume fills a larger cross-sectional area

Answer

Velocity increases because larger tubes have less wall friction

Answer

Velocity stays constant regardless of tube diameter changes

Answer

Velocity doubles for every inch added to the tube diameter

Question 3

In Casper pneumatic tube system airflow analysis, what does 'total pressure' equal?

Accepted Answer

Static pressure plus velocity (dynamic) pressure

Answer

Blower rated output pressure minus all calculated system losses

Answer

The pressure reading at the most distant station in the network only

Answer

Maximum rated tube pressure multiplied by a safety factor of 1.5

Question 4

Which two parameters are most critical when selecting a replacement blower for a Casper pneumatic tube system?

Accepted Answer

Required airflow volume (CFM) and static pressure capacity (in. WC or in. Hg)

Answer

Blower paint color and mounting bolt pattern

Answer

Blower weight and mechanical room ceiling height

Answer

Motor brand name and country of manufacture

Question 5

What is the purpose of a check valve in a Casper pneumatic tube system?

Accepted Answer

To prevent reverse airflow and carrier backsliding when the blower shuts down

Answer

To accelerate carrier speed through straight sections of tube

Answer

To count the number of carriers passing a specific point in the network

Answer

To vent excess system pressure safely to the surrounding atmosphere

Question 6

How does tube run length affect the blower pressure requirement in a Casper pneumatic tube installation?

Accepted Answer

Longer runs require higher blower pressure to overcome greater cumulative friction losses

Answer

Longer runs require lower pressure because carriers build momentum over distance

Answer

Tube length has no significant effect on required blower pressure

Answer

Pressure requirements level off and decrease in runs exceeding 100 feet

Question 7

In a Casper pneumatic tube system, what role does the electronic control module play in managing airflow and carrier routing?

Accepted Answer

It sequences blower activation and diverter valve positions to route carriers to their correct destinations

Answer

It physically grips and pushes carriers through tube junction points

Answer

It monitors only electrical power consumption of the blower motors

Answer

It sends manual alerts to technicians each time a carrier is placed in the system