CWEA Electrical and Instrument Grade 2
Study Guide
What is PPE Category 1? - CORRECT ANSWER-Requiring a single layer of arc-rated
PPE, workers need the following clothing: Required Clothing: Long Sleeve Shirt (or
Jacket) and Pants or AR Coverall with minimum arc rating of 4 cal/cm.
Is the Oxygen Safe Zone at 22% Safe? - CORRECT ANSWER-Yes, between 19.5% to
23.5%
L.O.T.O. - CORRECT ANSWER-Lock out tag out is an osha regulation.
The voltage from phase to ground in a 480v transformer is? - CORRECT ANSWER-277
volts.
What is the main electrical danger when using power tools? - CORRECT ANSWER-A
short circuit
Shielding protects an analog meter from? - CORRECT ANSWER-Stray magnetic fields.
The frame, core, winding and end plates are all parts of? - CORRECT ANSWER-A
stator.
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
Signal range for pneumatics? - CORRECT ANSWER-3-15psi. 3-6-9-12-15
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
, 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 instrument do you use to measure 4-20 mA? - CORRECT ANSWER-DC clamp
meter
How do you connect an ammeter to check an electrical circuit? - CORRECT ANSWER-
In series with the load.
If you are angry or impatient with one worker you should? - CORRECT ANSWER-Avoid
transferring that feeling to others.
First step in troubleshooting a programmable logic controller(PLC) system is? -
CORRECT ANSWER-Know the process
Which of the following actions should be taken before working on controls that may
disrupt plant operations? - CORRECT ANSWER-Have an operator present.
Which of the following best describes the efficiency of preventive maintenance for plant
equipment? - CORRECT ANSWER-Periodic inspection of facilities to discover
developing defects that could lead to equipment failure.
In a 240v-120v Delta system, the high leg is? - CORRECT ANSWER-208v
What class and division above water on a primary clarifier? - CORRECT ANSWER-
Class 1 Division 2
AC reads out how? - CORRECT ANSWER-Peak to peak.
HMI Screen down at the pump station, what to do? - CORRECT ANSWER-Ask operator
to monitor while you troubleshoot and try to fix
Where does the fluid enter in a Rotameter? - CORRECT ANSWER-Bottom
RPM on 4 pole 60 Hz motor - CORRECT ANSWER-1800 RPM
For every 10 Celsius change in operating temp. What happen to motor wire insulation? -
CORRECT ANSWER-Degrades 50%
What is it called when teaching someone Electrical Task Training? - CORRECT
ANSWER-Safety Task Training
Personnel injured when working around machines/equipment depending what they do.
Based on this: What two classification? - CORRECT ANSWER-Authorized-Affected
Study Guide
What is PPE Category 1? - CORRECT ANSWER-Requiring a single layer of arc-rated
PPE, workers need the following clothing: Required Clothing: Long Sleeve Shirt (or
Jacket) and Pants or AR Coverall with minimum arc rating of 4 cal/cm.
Is the Oxygen Safe Zone at 22% Safe? - CORRECT ANSWER-Yes, between 19.5% to
23.5%
L.O.T.O. - CORRECT ANSWER-Lock out tag out is an osha regulation.
The voltage from phase to ground in a 480v transformer is? - CORRECT ANSWER-277
volts.
What is the main electrical danger when using power tools? - CORRECT ANSWER-A
short circuit
Shielding protects an analog meter from? - CORRECT ANSWER-Stray magnetic fields.
The frame, core, winding and end plates are all parts of? - CORRECT ANSWER-A
stator.
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
Signal range for pneumatics? - CORRECT ANSWER-3-15psi. 3-6-9-12-15
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
, 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 instrument do you use to measure 4-20 mA? - CORRECT ANSWER-DC clamp
meter
How do you connect an ammeter to check an electrical circuit? - CORRECT ANSWER-
In series with the load.
If you are angry or impatient with one worker you should? - CORRECT ANSWER-Avoid
transferring that feeling to others.
First step in troubleshooting a programmable logic controller(PLC) system is? -
CORRECT ANSWER-Know the process
Which of the following actions should be taken before working on controls that may
disrupt plant operations? - CORRECT ANSWER-Have an operator present.
Which of the following best describes the efficiency of preventive maintenance for plant
equipment? - CORRECT ANSWER-Periodic inspection of facilities to discover
developing defects that could lead to equipment failure.
In a 240v-120v Delta system, the high leg is? - CORRECT ANSWER-208v
What class and division above water on a primary clarifier? - CORRECT ANSWER-
Class 1 Division 2
AC reads out how? - CORRECT ANSWER-Peak to peak.
HMI Screen down at the pump station, what to do? - CORRECT ANSWER-Ask operator
to monitor while you troubleshoot and try to fix
Where does the fluid enter in a Rotameter? - CORRECT ANSWER-Bottom
RPM on 4 pole 60 Hz motor - CORRECT ANSWER-1800 RPM
For every 10 Celsius change in operating temp. What happen to motor wire insulation? -
CORRECT ANSWER-Degrades 50%
What is it called when teaching someone Electrical Task Training? - CORRECT
ANSWER-Safety Task Training
Personnel injured when working around machines/equipment depending what they do.
Based on this: What two classification? - CORRECT ANSWER-Authorized-Affected
