CWEA ELECTRICAL AND INSTRUMENT GRADE
2 COMPREHENSIVE QUESTIONS AND
COMPLETE SOLUTIONS
◉ Hot Work Permit.
Answer: An employer's written authorization to perform work
capable of providing a source of ignition.
◉ Inerting.
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.
Answer: 19.5% to 23.5%
Below 19.5=unsafe for breathing
Above 23.5=explosive
◉ Leader Line.
,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".
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).
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".
Answer: Equivalent to a hydraulic volume flow rate; that is the
volumetric quantity of flowing water over time.
◉ Ohm's Law.
Answer: Current through a conductor between two points is directly
proportional to the voltage across the two points.
, ◉ S.O.P..
Answer: Standard operating procedure.
◉ N.E.C..
Answer: National Electrical Code.
◉ N.F.P.A..
Answer: National Fire Protection Association
◉ NPT.
Answer: National pipe thread. Tapered pipe.
◉ Compound Gauge.
Answer: Displays negative AND positive pressure measurements
◉ Cat1 Meter.
Answer: Measures electronics
◉ Cat2 Meter.
Answer: Measures single-phase receptacles.
2 COMPREHENSIVE QUESTIONS AND
COMPLETE SOLUTIONS
◉ Hot Work Permit.
Answer: An employer's written authorization to perform work
capable of providing a source of ignition.
◉ Inerting.
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.
Answer: 19.5% to 23.5%
Below 19.5=unsafe for breathing
Above 23.5=explosive
◉ Leader Line.
,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".
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).
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".
Answer: Equivalent to a hydraulic volume flow rate; that is the
volumetric quantity of flowing water over time.
◉ Ohm's Law.
Answer: Current through a conductor between two points is directly
proportional to the voltage across the two points.
, ◉ S.O.P..
Answer: Standard operating procedure.
◉ N.E.C..
Answer: National Electrical Code.
◉ N.F.P.A..
Answer: National Fire Protection Association
◉ NPT.
Answer: National pipe thread. Tapered pipe.
◉ Compound Gauge.
Answer: Displays negative AND positive pressure measurements
◉ Cat1 Meter.
Answer: Measures electronics
◉ Cat2 Meter.
Answer: Measures single-phase receptacles.
