Confined Space
A space that:
-is large enough to enter and work.
-has limited or restricted means for entry.
-is not designed for continuous
... [Show More] occupancy.
Hot Work Permit
An employer's written authorization to perform work capable of providing a source of ignition.
Inerting
A form of purging or ventilating a confined space where an inert gas (such as nitrogen, carbon dioxide or argon) is used to displace the atmosphere in a confined space to remove fire or explosion hazards. Causes oxygen levels to become unstable for re-entry.
Oxygen Safe Zone
19.5% to 23.5%
Below 19.5=unsafe for breathing
Above 23.5=explosive
Leader Line
The part or area of a drawing to which a number, note or other reference applies. They are solid lines and usually terminate in a single arrowhead.
Hydraulic Term:
"Resistance"
A construction in the bore of the pipe which requires more pressure to pass the same amount of water.
Hydraulic Term:
"Voltage"
(Assume water is flowing horizontally so gravity isn't a factor)
Electric potential is equivalent to pressure and the voltage (or voltage drop/potential difference) is the difference in pressure between two points.
Hydraulic Term:
"Current"
Equivalent to a hydraulic volume flow rate; that is the volumetric quantity of flowing water over time.
Ohm's Law
Current through a conductor between two points is directly proportional to the voltage across the two points.
S.O.P.
Standard operating procedure.
N.E.C.
National Electrical Code.
N.F.P.A.
National Fire Protection Association
NPT
National pipe thread. Tapered pipe.
Compound Gauge
Displays negative AND positive pressure measurements
Cat1 Meter
Measures electronics
Cat2 Meter
Measures single-phase receptacles.
Cat3 Meter
Measures 3 phase distribution and single phase lighting equipment.
Cat4 Meter
Measures 3 phase at utility connection and any outdoor connections.
L.O.T.O.
Lock out tag out is an osha regulation.
3 elements needed to start a fire.
Heat, oxygen and fuel.
Class C fire.
Electrical fire
What is Rust
Combination of water, oxygen and iron.
Micrometer Torque Wrench does what when setting is reached?
Clicks.
V.F.D.
Variable frequency drive used for AC motor speed in hertz.
Bourdon Tube Gauge shape
C shaped.
1 PSI = ? feet of water.
2.31
Partial Flume
A device used to measure the flow in an open channel. The flume narrows to a throat of fixed dimensions and then expands again. The rate of flow can be calculated by measuring the difference in head (pressure) before and at the throat of the flume.
Measuring at sea level and 8000' does an O2 sensor need recalibration.
Yes, because of pressure difference.
Hysteresis
Input ascending and descending
Turbine Flow Meters provide what kind of signal?
Provide a frequency or pulse output signal
What happens to wire resistance when temperature rises 10 degrees Celsius?
It decreases 10%.
Inductor
Coil of wire that opposes any change in current.
Magnetic Flow Meters show what when the water is low in conductivity?
0 reading if the fluid is low in conductivity.
"Empty Meter"
Purple U.S.A. marking.
Reclaimed water.
Orange U.S.A. marking.
Telecommunication, alarm or signal lines conduit.
Red U.S.A. marking.
Electric power lines, cables or conduit.
What happens when a motor loses one phase out of 3?
Single phasing will cause the motor to trip the overload heaters.
What does a Pitot tube do?
Measures velocity of low to medium gas flow applications.
PH range?
0-14
7 is neutral.
Less than 7 is acidic.
More than 7 is base (alkaline) [Show Less]