WorksheetsFan Laws #1 + Night 3
Total questions: 10
Worksheet time: 8mins
CFM2/CFM1=RPM2/RPM1
to solve for RPM2 if we rearrange the equation to?
RPM2= CFM2/CFM1xRPM1
RPM2= RPM1x(CFM1/CFM2)
RPM2= RPM1xCFM2/CFM1
RPM2= CFM2/CFM1/RPM1
True of False
CFM= Flow x Area
True
False
Velocity is the AVERAGE velocity in a test section of duct?
True
False
When we measure our duct work in inches we multiply by 144" to turn our area into feet?
True
False
Belt tension is critical and should ALWAYs be checked with a belt tension gauge!
True
False
2 Types of Misalignment are Angular and Parallel
True
False
What are the safest ways to measure the RPM of a shaft?
Touching the shaft with a Tachometer to the shaft
Putting a sticker on he shaft and using a photo Tachometer
Using a Stroboscope
Using a Tachometer with the wheel on it pressed against the belt
Total Pressure = Static Pressure + Frictional Resistance
True
False
The Abbreviation SCFM stands for: Standard Cubic Feet per Minute
True
False
Frictional Resistance of a duct system is indicated by:
Velocity Pressure
Static Pressure
Total Pressure
