CWEA E1 Study Set questions and answers 2026\2027
A+ Grade
If transformer primary=120v and secondary 12v=20 amps, what are the amps on the primary?
- correct answer 2 amps.
Formula:
I =Amps/Volume of current
E = Volts/Force moving the current
P = Watts, Electrical power produced
I x E=P
12 x 20=240watts
In a transformer watts stay the same so now:
P/E=I
240/120v=2 amps
If 17.32v are applied across a resistance of 50 ohms, how much power is expended in the resistor?
- correct answer 6.0 watts.
Formula: V squared/R = P
17.32 squared(299.98)/50=5.99
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.
A+ Grade
If transformer primary=120v and secondary 12v=20 amps, what are the amps on the primary?
- correct answer 2 amps.
Formula:
I =Amps/Volume of current
E = Volts/Force moving the current
P = Watts, Electrical power produced
I x E=P
12 x 20=240watts
In a transformer watts stay the same so now:
P/E=I
240/120v=2 amps
If 17.32v are applied across a resistance of 50 ohms, how much power is expended in the resistor?
- correct answer 6.0 watts.
Formula: V squared/R = P
17.32 squared(299.98)/50=5.99
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.
