ESCO ELECTRICAL CERTIFICATION EXAM
2024 / STUDY GUIDE / ACTUAL EXAM
QUESTIONS AND ANSWERS GOOD GRADE
IS WELL GUARANTEED GRADE A+
The voltage to ground of a "high Leg" or "Stinger Leg" on a three phase
open Delta system will
be approximately? - ANSWERS-208 volts
Any material that will readily release electrons is called - ANSWERS-
conductor
Symbol for current - ANSWERS-I (amps)
Electricity can produce: - ANSWERS-All the above
light
heat
magnetism
, The safety ground conductor is usually colored: - ANSWERS-Green
An electron has a ____ - ANSWERS-negative charge
Which of the following materials would be best suited for use as a semi-
conductor? - ANSWERS-Silicon
Which of the following meters must use internal power to check a load
or circuit? - ANSWERS-Ohmmeter
What is current flow? - ANSWERS-The flow of electrons in a circuit.
What is impedance? - ANSWERS-opposition to alternating currents
Like charges will - ANSWERS-Repel each other
What would be the result if a 24 volt, 20 ohm contactor coil was wired
in series with a 24 volt, 200 ohm control relay? - ANSWERS-Only the
control relay would operate
Three defrost heaters, each 15 ohms, are wired in parallel to a 120 volt
power supply. How many Watts are consumed? - ANSWERS-2880
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