Pneumatic Systems Flashcards
The energy of compressed air in the lines can cause severe whiplash when one end of the hose is let free. This can be overcome with an _________________________ that stops flow through the line, if excessive flow occurs
Excess flow valve
T or F
vertical cylinders must be let down or mechanically block to prevent movement before performing any work on or around them .
True
piping should be sized to minimize _________________ by being large enough with a few bends as possible
Pressure drop
The purpose of a __________ in a pneumatic system is to lower the dewpoint so that it does not cause problems in the system
Dryer
T or F
The cyclone separator can be used anywhere in the system that moisture might fall out
True
T or F
Air receivers are used to store, compressed air to take up fluctuations in demand and allow the system pressure to vary within reasonable limits .
True
The purpose of the __________________________ is to bleed off access system pressure before it becomes too extreme.
Safety relief valve
T or F
leaks waste energy (from compression) which increases expenses while reducing the performance of air tools and equipment
True
most compressed air systems run for long distances. This allows the air to cool before it’s _______________, which causes moisture to fall out of the airstream
dew point
T or F
flow control valves control the volume, and therefore the speed of an actuator
True
T or F
pilot operation refers to valves that are operated with air pressure. Internally piloted means the air pressure within the valve is used to perform the shifting function.
True
the 3/2 valves can be used if the air needs to be released when the valve is closed. A typical application is the operation of a ___________ acting cylinder
Single
A _________ acting cylinder is a common application of the 4/2 valve
double
the __________________ is used to automatically select the higher of to pressure sources to supply a pneumatic signal
Shuttle valve
T or F
One of the first items to check in a malfunctioning system is whether there is a supply of air that is sufficient to flow and pressurize
True
