CWEA E1 Study Set
Which of the following actions should be taken before working on controls that may
disrupt plant operations? - CORRECT ANSWER-Have an operator present.
Where do you start troubleshooting when an electrical motor fails to operate after
observing a mechanical failure? - CORRECT ANSWER-At the power source.
Overloading an electrical circuit may be caused by? - CORRECT ANSWER-Connecting
loads that draw too much current.
What type of current is stored in a 9v battery? - CORRECT ANSWER-Direct current
(DC)
What does GFI stand for? - CORRECT ANSWER-Ground fault interrupter
What does EMT stand for? - CORRECT ANSWER-Electric metal tubing.
What device would be used to measure AC current flow in a large diameter conductor?
- CORRECT ANSWER-A clamp-on type ammeter.
What is the purpose of electrical interlock switches on panel doors? - CORRECT
ANSWER-To interrupt local power for personal protection.
What action is necessary before restarting equipment that has recently undergone
repair? - CORRECT ANSWER-All removed guards must be installed.
Partial Flume - CORRECT ANSWER-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. - CORRECT
ANSWER-Yes, because of pressure difference.
Hysteresis - CORRECT ANSWER-Input ascending and descending
Turbine Flow Meters provide what kind of signal? - CORRECT ANSWER-Provide a
frequency or pulse output signal
What happens to wire resistance when temperature rises 10 degrees Celsius? -
CORRECT ANSWER-It decreases 10%.
, Inductor - CORRECT ANSWER-Coil of wire that opposes any change in current.
Magnetic Flow Meters show what when the water is low in conductivity? - CORRECT
ANSWER-0 reading if the fluid is low in conductivity.
"Empty Meter"
Purple U.S.A. marking. - CORRECT ANSWER-Reclaimed water.
Orange U.S.A. marking. - CORRECT ANSWER-Telecommunication, alarm or signal
lines conduit.
Red U.S.A. marking. - CORRECT ANSWER-Electric power lines, cables or conduit.
What happens when a motor loses one phase out of 3? - CORRECT ANSWER-Single
phasing will cause the motor to trip the overload heaters.
What does a Pitot tube do? - CORRECT ANSWER-Measures velocity of low to medium
gas flow applications.
PH range? - CORRECT ANSWER-0-14
7 is neutral.
Less than 7 is acidic.
More than 7 is base (alkaline)
How long is a confined space permit valid for according to OSHA? - CORRECT
ANSWER-No longer than it takes to get the work done.
Entry permits are valid for more than one shift if permit info contains provisions covering
shifts.
The voltage from phase to ground in a 480v transformer is? - CORRECT ANSWER-277
volts.
Signal range for pneumatics? - CORRECT ANSWER-3-15psi. 3-6-9-12-15
Intrinsic safety is? - CORRECT ANSWER-Barrier preventing excess voltage or current
from reaching in hazardous area.
How do you add capacitors in series? - CORRECT ANSWER-Same as resistors.
How many paths in a parallel circuit? - CORRECT ANSWER-More than 1.
Determined "Power Factor" formula. - CORRECT ANSWER-PF=kw/kva
If transformer primary=120v and secondary 12v=20 amps, what are the amps on the
primary? - CORRECT ANSWER-2 amps.
Which of the following actions should be taken before working on controls that may
disrupt plant operations? - CORRECT ANSWER-Have an operator present.
Where do you start troubleshooting when an electrical motor fails to operate after
observing a mechanical failure? - CORRECT ANSWER-At the power source.
Overloading an electrical circuit may be caused by? - CORRECT ANSWER-Connecting
loads that draw too much current.
What type of current is stored in a 9v battery? - CORRECT ANSWER-Direct current
(DC)
What does GFI stand for? - CORRECT ANSWER-Ground fault interrupter
What does EMT stand for? - CORRECT ANSWER-Electric metal tubing.
What device would be used to measure AC current flow in a large diameter conductor?
- CORRECT ANSWER-A clamp-on type ammeter.
What is the purpose of electrical interlock switches on panel doors? - CORRECT
ANSWER-To interrupt local power for personal protection.
What action is necessary before restarting equipment that has recently undergone
repair? - CORRECT ANSWER-All removed guards must be installed.
Partial Flume - CORRECT ANSWER-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. - CORRECT
ANSWER-Yes, because of pressure difference.
Hysteresis - CORRECT ANSWER-Input ascending and descending
Turbine Flow Meters provide what kind of signal? - CORRECT ANSWER-Provide a
frequency or pulse output signal
What happens to wire resistance when temperature rises 10 degrees Celsius? -
CORRECT ANSWER-It decreases 10%.
, Inductor - CORRECT ANSWER-Coil of wire that opposes any change in current.
Magnetic Flow Meters show what when the water is low in conductivity? - CORRECT
ANSWER-0 reading if the fluid is low in conductivity.
"Empty Meter"
Purple U.S.A. marking. - CORRECT ANSWER-Reclaimed water.
Orange U.S.A. marking. - CORRECT ANSWER-Telecommunication, alarm or signal
lines conduit.
Red U.S.A. marking. - CORRECT ANSWER-Electric power lines, cables or conduit.
What happens when a motor loses one phase out of 3? - CORRECT ANSWER-Single
phasing will cause the motor to trip the overload heaters.
What does a Pitot tube do? - CORRECT ANSWER-Measures velocity of low to medium
gas flow applications.
PH range? - CORRECT ANSWER-0-14
7 is neutral.
Less than 7 is acidic.
More than 7 is base (alkaline)
How long is a confined space permit valid for according to OSHA? - CORRECT
ANSWER-No longer than it takes to get the work done.
Entry permits are valid for more than one shift if permit info contains provisions covering
shifts.
The voltage from phase to ground in a 480v transformer is? - CORRECT ANSWER-277
volts.
Signal range for pneumatics? - CORRECT ANSWER-3-15psi. 3-6-9-12-15
Intrinsic safety is? - CORRECT ANSWER-Barrier preventing excess voltage or current
from reaching in hazardous area.
How do you add capacitors in series? - CORRECT ANSWER-Same as resistors.
How many paths in a parallel circuit? - CORRECT ANSWER-More than 1.
Determined "Power Factor" formula. - CORRECT ANSWER-PF=kw/kva
If transformer primary=120v and secondary 12v=20 amps, what are the amps on the
primary? - CORRECT ANSWER-2 amps.
