CWEA ELECTRICAL AND INSTRUMENT
EXAM PREP QUESTIONS AND ANSWERS
2026 FULL SOLUTION VIEW AHEAD
◉ What do you use to clean Electrical instruments?
Answer: For Electro-pnuematic Positioners you use solvent.
◉ Where are the overloads installed on a wire diagram?
Answer: Before circuit protection, in series with the line leads.
◉ Arc-rated clothing is rated?
Answer: Cal/Cm2
◉ Whats the maximum ampacity on #12 rated wires
THWN?(Thermoplastic Heat and Water-resistant Nylon-coated)
Answer: 25 amps.
◉ On a 480v 3 phase wye, the nuetral and line phase are?
Answer: 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"?
Answer: 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?
Answer: 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?
Answer: 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?
Answer: 7941.875
◉ Ladder Diagram
Answer: 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.
EXAM PREP QUESTIONS AND ANSWERS
2026 FULL SOLUTION VIEW AHEAD
◉ What do you use to clean Electrical instruments?
Answer: For Electro-pnuematic Positioners you use solvent.
◉ Where are the overloads installed on a wire diagram?
Answer: Before circuit protection, in series with the line leads.
◉ Arc-rated clothing is rated?
Answer: Cal/Cm2
◉ Whats the maximum ampacity on #12 rated wires
THWN?(Thermoplastic Heat and Water-resistant Nylon-coated)
Answer: 25 amps.
◉ On a 480v 3 phase wye, the nuetral and line phase are?
Answer: 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"?
Answer: 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?
Answer: 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?
Answer: 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?
Answer: 7941.875
◉ Ladder Diagram
Answer: 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.
