CWEA ELECTRICAL AND INSTRUMENTATION GRADE 2
EXAM SCRIPT 2025/2026 QUESTIONS WITH ANSWERS
GRADED A+
✔✔If 17.32v are applied across a resistance of 50 ohms, how much power is expended
in the resistor? - ✔✔6.0 watts.
Formula: V squared/R = P
17.32 squared(299.98)/50=5.99
✔✔Signal range for pneumatics? - ✔✔3-15psi. 3-6-9-12-15
✔✔If transformer primary=120v and secondary 12v=20 amps, what are the amps on the
primary? - ✔✔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? - ✔✔Single phasing will
cause the motor to trip the overloads
✔✔What instrument do you use to measure 4-20 mA? - ✔✔DC clamp meter
✔✔How do you connect an ammeter to check an electrical circuit? - ✔✔In series with
the load.
✔✔If you are angry or impatient with one worker you should? - ✔✔Avoid transferring
that feeling to others.
✔✔First step in troubleshooting a programmable logic controller(PLC) system is? -
✔✔Knowing and understanding the process
✔✔Which of the following actions should be taken before working on controls that may
disrupt plant operations? - ✔✔Have an operator present.
✔✔Which of the following best describes the efficiency of preventive maintenance for
plant equipment? - ✔✔Periodic inspection of facilities to discover developing defects
that could lead to equipment failure.
, ✔✔In a 240v-120v Delta system, the high leg is? - ✔✔208v
✔✔What class and division would it be above water on a primary clarifier? - ✔✔Class 1
Division 2
✔✔AC reads out how? - ✔✔Peak to peak.
✔✔What do you use to clean Electrical instruments? - ✔✔For Electro-pnuematic
Positioners you use solvent.
✔✔Where are the overloads installed on a wire diagram? - ✔✔Before circuit protection,
in series with the line leads.
✔✔Arc-rated clothing is rated? - ✔✔Cal/Cm2
✔✔Whats the maximum ampacity on #12 rated wires THWN?(Thermoplastic Heat and
Water-resistant Nylon-coated) - ✔✔25 amps.
✔✔On a 480v 3 phase wye, the nuetral and line phase are? - ✔✔he same times the
square root of 3 (1.73)=480.
(Comes to 277v)
✔✔What happens to the speed of a 3 phase motor with an "unbalanced load"? - ✔✔It's
called single phasing and will burn/heat up the motor quickly.
✔✔In excess of what voltage shall insulated tools and gloves be worn for? - ✔✔120v
✔✔A 3 phase motor shows 15 FLA.(Full Load Amperes) You have readings of 15.6,
16.1 and 15.9, what is the condition of the motor? - ✔✔The motor is overloaded.
✔✔4-20 mA output for a device with a range of 0-63,535. Read is 6 mA. What is the
measurement reading? - ✔✔7941.875
✔✔Ladder Diagram - ✔✔Ladder diagrams are specialized schematics commonly used
to document industrial control logic systems(PLCs).
They are called "ladder" diagrams because they resemble a ladder, with two vertical
rails (supply power) and as many "rungs" (horizontal lines) as there are control circuits
to represent.
✔✔How to measure 4-20ma with a digital multi meter(dmm). - ✔✔Disconnect one wire
of the loop and connect the DMM in series.
EXAM SCRIPT 2025/2026 QUESTIONS WITH ANSWERS
GRADED A+
✔✔If 17.32v are applied across a resistance of 50 ohms, how much power is expended
in the resistor? - ✔✔6.0 watts.
Formula: V squared/R = P
17.32 squared(299.98)/50=5.99
✔✔Signal range for pneumatics? - ✔✔3-15psi. 3-6-9-12-15
✔✔If transformer primary=120v and secondary 12v=20 amps, what are the amps on the
primary? - ✔✔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? - ✔✔Single phasing will
cause the motor to trip the overloads
✔✔What instrument do you use to measure 4-20 mA? - ✔✔DC clamp meter
✔✔How do you connect an ammeter to check an electrical circuit? - ✔✔In series with
the load.
✔✔If you are angry or impatient with one worker you should? - ✔✔Avoid transferring
that feeling to others.
✔✔First step in troubleshooting a programmable logic controller(PLC) system is? -
✔✔Knowing and understanding the process
✔✔Which of the following actions should be taken before working on controls that may
disrupt plant operations? - ✔✔Have an operator present.
✔✔Which of the following best describes the efficiency of preventive maintenance for
plant equipment? - ✔✔Periodic inspection of facilities to discover developing defects
that could lead to equipment failure.
, ✔✔In a 240v-120v Delta system, the high leg is? - ✔✔208v
✔✔What class and division would it be above water on a primary clarifier? - ✔✔Class 1
Division 2
✔✔AC reads out how? - ✔✔Peak to peak.
✔✔What do you use to clean Electrical instruments? - ✔✔For Electro-pnuematic
Positioners you use solvent.
✔✔Where are the overloads installed on a wire diagram? - ✔✔Before circuit protection,
in series with the line leads.
✔✔Arc-rated clothing is rated? - ✔✔Cal/Cm2
✔✔Whats the maximum ampacity on #12 rated wires THWN?(Thermoplastic Heat and
Water-resistant Nylon-coated) - ✔✔25 amps.
✔✔On a 480v 3 phase wye, the nuetral and line phase are? - ✔✔he same times the
square root of 3 (1.73)=480.
(Comes to 277v)
✔✔What happens to the speed of a 3 phase motor with an "unbalanced load"? - ✔✔It's
called single phasing and will burn/heat up the motor quickly.
✔✔In excess of what voltage shall insulated tools and gloves be worn for? - ✔✔120v
✔✔A 3 phase motor shows 15 FLA.(Full Load Amperes) You have readings of 15.6,
16.1 and 15.9, what is the condition of the motor? - ✔✔The motor is overloaded.
✔✔4-20 mA output for a device with a range of 0-63,535. Read is 6 mA. What is the
measurement reading? - ✔✔7941.875
✔✔Ladder Diagram - ✔✔Ladder diagrams are specialized schematics commonly used
to document industrial control logic systems(PLCs).
They are called "ladder" diagrams because they resemble a ladder, with two vertical
rails (supply power) and as many "rungs" (horizontal lines) as there are control circuits
to represent.
✔✔How to measure 4-20ma with a digital multi meter(dmm). - ✔✔Disconnect one wire
of the loop and connect the DMM in series.
