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