CWEA E1 Study Set questions and answers
2025\2026 A+ grade
Confined Space
- correct answer 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
- correct answer An employer's written authorization to perform work capable of providing a source of
ignition.
Inerting
- correct answer 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
- correct answer 19.5% to 23.5%
Below 19.5=unsafe for breathing
Above 23.5=explosive
Leader Line
- correct answer 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"
- correct answer 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)
- correct answer 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"
- correct answer Equivalent to a hydraulic volume flow rate; that is the volumetric quantity of flowing
water over time.
Ohm's Law
- correct answer Current through a conductor between two points is directly proportional to the voltage
across the two points.
S.O.P.
- correct answer Standard operating procedure.
N.E.C.
- correct answer National Electrical Code.
N.F.P.A.
- correct answer National Fire Protection Association
NPT
- correct answer National pipe thread. Tapered pipe.
Compound Gauge
- correct answer Displays negative AND positive pressure measurements
Cat1 Meter
- correct answer Measures electronics
2025\2026 A+ grade
Confined Space
- correct answer 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
- correct answer An employer's written authorization to perform work capable of providing a source of
ignition.
Inerting
- correct answer 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
- correct answer 19.5% to 23.5%
Below 19.5=unsafe for breathing
Above 23.5=explosive
Leader Line
- correct answer 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"
- correct answer 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)
- correct answer 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"
- correct answer Equivalent to a hydraulic volume flow rate; that is the volumetric quantity of flowing
water over time.
Ohm's Law
- correct answer Current through a conductor between two points is directly proportional to the voltage
across the two points.
S.O.P.
- correct answer Standard operating procedure.
N.E.C.
- correct answer National Electrical Code.
N.F.P.A.
- correct answer National Fire Protection Association
NPT
- correct answer National pipe thread. Tapered pipe.
Compound Gauge
- correct answer Displays negative AND positive pressure measurements
Cat1 Meter
- correct answer Measures electronics
