Important #'S Flashcards
What is the most important thing for compressors/ pneumatic systems?
Volume of air
What is the purpose of a diagram in a compressor?
Prevents short cycling of air
Stops air from leaking from one size to another
On your piston rings , the dots , are they going up or down?
They go up
Pascals law formula
F= P x A
P= F/A
A= F/P
When starting up a system, what is one thing that needs to be done?
Purge the system (Air)
Why would you want / require external supply?
Want new/clean liquid
What type of dryer style is the best?
Refrigerant style
How to calculate vacuum?
What is the slope of air lines?
1 inch over 10ft
What is the purpose of breathers on a tank?
Ensures that the pressure within storage tank remains within safe limits.
What is wrong with Compressor not building pressure?
Either problem with check valve, pressure switch
Or Compressor itself
Always have the T facing?
Up
What end needs thrust bearing?
Top end / load end
Process piping , how do you test type of pipe?
Spark test
What is your pumping valve in bottom of an accumulator ?
Access a Check valve
What type of pressure gauge has a tube that’s straighten ?
Bordon take
How do you increase flow in an axial piston pump
Adjust the squash plate
How are check valves seated?
Gravity
Spring
What does FRL stand for?
Filter regular lubricant
What is Dew point?
When moisture drops out of suspension because of a rapid temperature change
How do you find area of a circle?
A=pie r2
What are the pump elements of a reciprocating pump?
A plunger
A piston
A diaphragm
What can cause pump to change?
- wear 2. Leaks 3. Restriction I. Temperature of liquid
How are pumps sized?
Flow rate
Bernoulli principle
Velocity increases inversely to pressure
How to check for soft foot ?
At the foot of the machine , set up dial indicator or using an feelergauge under the foot. Unloosen the bolts and this will determine now much soft foot you have. Correct with shims
How to adjust vane pump
Pressure is adjusted by turning an screw clockwise to increase the pressure, and turning it anticlockwise reduce the pressure
DBS ?
Dial bar sag
Open/closed impellers
Why would you use a stainless tank?
Keep corrosion away
Why use a blower instead of a fan?
More pressure
What is soft foot?
Uneven feet /footing making it wobble
What is max # of shims to be used together ?
3
How do you measure shims?
Micrometer
What is something you should do with shims before using?
Clean, measure
What does DBS stand for ?
Dial bar sag
Why would you purposely misalign a pump?
Account for thermal expansion
What does NPT stand for?
National pipe tape
What is used to measure air pressure?
Barometer
What valve is used with an accumulator ?
Shuttle valve
What is the purpose of a detent ?
To resist or arrest the movement of A mechanical device
