CWEA E1 STUDY GUIDE
Confined Space - Answers :A space that:
-is large enough to enter and work.
-has limited or restricted means for entry.
-is not designed for continuous occupancy.
Hot Work Permit - Answers :An employer's written authorization to perform work
capable of providing a source of ignition.
Inerting - Answers :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 - Answers :19.5% to 23.5%
Below 19.5=unsafe for breathing
Above 23.5=explosive
Leader Line - Answers :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" - Answers :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) - Answers :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" - Answers :Equivalent to a hydraulic volume flow rate; that is the volumetric
quantity of flowing water over time.
Ohm's Law - Answers :Current through a conductor between two points is directly
proportional to the voltage across the two points.
S.O.P. - Answers :Standard operating procedure.
N.E.C. - Answers :National Electrical Code.
N.F.P.A. - Answers :National Fire Protection Association
NPT - Answers :National pipe thread. Tapered pipe.
, Compound Gauge - Answers :Displays negative AND positive pressure measurements
Cat1 Meter - Answers :Measures electronics
Cat2 Meter - Answers :Measures single-phase receptacles.
Cat3 Meter - Answers :Measures 3 phase distribution and single phase lighting
equipment.
Cat4 Meter - Answers :Measures 3 phase at utility connection and any outdoor
connections.
L.O.T.O. - Answers :Lock out tag out is an osha regulation.
3 elements needed to start a fire. - Answers :Heat, oxygen and fuel.
Class C fire. - Answers :Electrical fire
What is Rust - Answers :Combination of water, oxygen and iron.
Micrometer Torque Wrench does what when setting is reached? - Answers :Clicks.
V.F.D. - Answers :Variable frequency drive used for AC motor speed in hertz.
Bourdon Tube Gauge shape - Answers :C shaped.
1 PSI = ? feet of water. - Answers :2.31
Partial Flume - Answers :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. - Answers
:Yes, because of pressure difference.
Hysteresis - Answers :Input ascending and descending
Turbine Flow Meters provide what kind of signal? - Answers :Provide a frequency or
pulse output signal
What happens to wire resistance when temperature rises 10 degrees Celsius? -
Answers :It decreases 10%.
Inductor - Answers :Coil of wire that opposes any change in current.
Confined Space - Answers :A space that:
-is large enough to enter and work.
-has limited or restricted means for entry.
-is not designed for continuous occupancy.
Hot Work Permit - Answers :An employer's written authorization to perform work
capable of providing a source of ignition.
Inerting - Answers :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 - Answers :19.5% to 23.5%
Below 19.5=unsafe for breathing
Above 23.5=explosive
Leader Line - Answers :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" - Answers :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) - Answers :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" - Answers :Equivalent to a hydraulic volume flow rate; that is the volumetric
quantity of flowing water over time.
Ohm's Law - Answers :Current through a conductor between two points is directly
proportional to the voltage across the two points.
S.O.P. - Answers :Standard operating procedure.
N.E.C. - Answers :National Electrical Code.
N.F.P.A. - Answers :National Fire Protection Association
NPT - Answers :National pipe thread. Tapered pipe.
, Compound Gauge - Answers :Displays negative AND positive pressure measurements
Cat1 Meter - Answers :Measures electronics
Cat2 Meter - Answers :Measures single-phase receptacles.
Cat3 Meter - Answers :Measures 3 phase distribution and single phase lighting
equipment.
Cat4 Meter - Answers :Measures 3 phase at utility connection and any outdoor
connections.
L.O.T.O. - Answers :Lock out tag out is an osha regulation.
3 elements needed to start a fire. - Answers :Heat, oxygen and fuel.
Class C fire. - Answers :Electrical fire
What is Rust - Answers :Combination of water, oxygen and iron.
Micrometer Torque Wrench does what when setting is reached? - Answers :Clicks.
V.F.D. - Answers :Variable frequency drive used for AC motor speed in hertz.
Bourdon Tube Gauge shape - Answers :C shaped.
1 PSI = ? feet of water. - Answers :2.31
Partial Flume - Answers :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. - Answers
:Yes, because of pressure difference.
Hysteresis - Answers :Input ascending and descending
Turbine Flow Meters provide what kind of signal? - Answers :Provide a frequency or
pulse output signal
What happens to wire resistance when temperature rises 10 degrees Celsius? -
Answers :It decreases 10%.
Inductor - Answers :Coil of wire that opposes any change in current.
