ESCO ELECTRICAL CERTIFICATION EXAM
QUESTIONS WITH VERIFIED ANSWERS
2026 | Practice Questions | A+ Verified
• What is current flow? -✓✓The flow of electrons in a circuit.
• What is impedance? -✓✓opposition to alternating currents
• Like charges will -✓✓Repel each other
• Any material that will readily release electrons is called -✓✓conductor
• Symbol for current -✓✓I (amps)
• Electricity can produce: -✓✓All the above
light
heat
magnetism
• The safety ground conductor is usually colored: -✓✓Green
• An electron has a ____ -✓✓negative charge
• Which of the following materials would be best suited for use as a semi-conductor? -
✓✓Silicon
• Which of the following meters must use internal power to check a load or circuit? -
✓✓Ohmmeter
• 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? -✓✓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? -✓✓2880
• When testing a capacitor with an analog or digital ohmmeter, the meter should: -
✓✓Measure low resistance then return to a high reading.
• How much resistance must be placed in a 120 volt circuit to limit the current to 2
amps? -✓✓60 ohms
• What is resistance? -✓✓opposition to electron flow
QUESTIONS WITH VERIFIED ANSWERS
2026 | Practice Questions | A+ Verified
• What is current flow? -✓✓The flow of electrons in a circuit.
• What is impedance? -✓✓opposition to alternating currents
• Like charges will -✓✓Repel each other
• Any material that will readily release electrons is called -✓✓conductor
• Symbol for current -✓✓I (amps)
• Electricity can produce: -✓✓All the above
light
heat
magnetism
• The safety ground conductor is usually colored: -✓✓Green
• An electron has a ____ -✓✓negative charge
• Which of the following materials would be best suited for use as a semi-conductor? -
✓✓Silicon
• Which of the following meters must use internal power to check a load or circuit? -
✓✓Ohmmeter
• 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? -✓✓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? -✓✓2880
• When testing a capacitor with an analog or digital ohmmeter, the meter should: -
✓✓Measure low resistance then return to a high reading.
• How much resistance must be placed in a 120 volt circuit to limit the current to 2
amps? -✓✓60 ohms
• What is resistance? -✓✓opposition to electron flow
