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Esco Electrical Test Questions with Detailed Verified
Answers
What is current flow? Ans: ✓ ✓ ✓ D.The flow of electrons in a circuit
What is impedance? Ans: ✓ ✓ ✓ A.Opposition to alternating current
Like charges will Ans: ✓ ✓ ✓ B.Repel each other
Any material that will readily release electrons is called: Ans: ✓ ✓ ✓ B.A conductor
The symbol for current is: Ans: ✓ ✓ ✓ B. I
Electricity can produce: Ans: ✓ ✓ ✓ D. All the above
light
heat
magnetism
The safety ground conductor is usually colored: Ans: ✓ ✓ ✓ B.Green
An electron has: Ans: ✓ ✓ ✓ B.A negative charge
Which of the following materials would be best suited for use as a semi-conductor? Ans: ✓ ✓ ✓
D.Silicon
Which of the following meters must use internal power to check a load or circuit? Ans: ✓ ✓ ✓
A.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? Ans: ✓ ✓ ✓ B.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? Ans: ✓ ✓ ✓ C. 2880
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When testing a capacitor with an analog or digital ohmmeter, the meter should: Ans: ✓ ✓ ✓
B.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? Ans: ✓ ✓
✓ A.60 ohms
What is resistance? Ans: ✓ ✓ ✓ A.Opposition to electron flow
In electrical wiring, a black colored wire indicates: Ans: ✓ ✓ ✓ A. A hot conductor
How many watts are used by a heater operating on 460 volts and drawing 5 amps? Ans: ✓ ✓ ✓ D
.2300
How are fuses sized? Ans: ✓ ✓ ✓ D .Both A and B
What is generally considered the maximum allowable supply voltage variation Ans: ✓ ✓ ✓ A.5%
Capacitors are rated in: Ans: ✓ ✓ ✓ D .Both B and C
What is the term used to describe the output side of a transformer? Ans: ✓ ✓ ✓ D .Secondary side
One horsepower is equal to ______ watts. Ans: ✓ ✓ ✓ B. 746
A parallel circuit contains an 18 ohm and a 9 ohm resistor. What is the total resistance? Ans: ✓ ✓ ✓
A.6 ohms
In a series circuit, the voltage drop across each load will: Ans: ✓ ✓ ✓ D .Add up to equal the source
voltage
Which of the following is equal to 2.1kW? Ans: ✓ ✓ ✓ c .2100 watts
A capacitor analyzer is designed to check: Ans: ✓ ✓ ✓ D .The capacitance of the a capacitor
On an electronic oil safety switch, what changes the pressure signal to an electrical signal? Ans: ✓
✓ ✓ A.Transducer
A three phase load requires a minimum of Ans: ✓ ✓ ✓ A.Three supply lines
An electronically commutated motor (ECM) is designed to: Ans: ✓ ✓ ✓ D .Provide proper airflow
under various conditions
Resistance can be calculated by: Ans: ✓ ✓ ✓ A.E divided by I
© Get it right 2025 Getaway - Stuvia US All rights reserved
Esco Electrical Test Questions with Detailed Verified
Answers
What is current flow? Ans: ✓ ✓ ✓ D.The flow of electrons in a circuit
What is impedance? Ans: ✓ ✓ ✓ A.Opposition to alternating current
Like charges will Ans: ✓ ✓ ✓ B.Repel each other
Any material that will readily release electrons is called: Ans: ✓ ✓ ✓ B.A conductor
The symbol for current is: Ans: ✓ ✓ ✓ B. I
Electricity can produce: Ans: ✓ ✓ ✓ D. All the above
light
heat
magnetism
The safety ground conductor is usually colored: Ans: ✓ ✓ ✓ B.Green
An electron has: Ans: ✓ ✓ ✓ B.A negative charge
Which of the following materials would be best suited for use as a semi-conductor? Ans: ✓ ✓ ✓
D.Silicon
Which of the following meters must use internal power to check a load or circuit? Ans: ✓ ✓ ✓
A.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? Ans: ✓ ✓ ✓ B.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? Ans: ✓ ✓ ✓ C. 2880
© Get it right 2025 Getaway - Stuvia US All rights reserved
, Click here for more: Scholars nexus
When testing a capacitor with an analog or digital ohmmeter, the meter should: Ans: ✓ ✓ ✓
B.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? Ans: ✓ ✓
✓ A.60 ohms
What is resistance? Ans: ✓ ✓ ✓ A.Opposition to electron flow
In electrical wiring, a black colored wire indicates: Ans: ✓ ✓ ✓ A. A hot conductor
How many watts are used by a heater operating on 460 volts and drawing 5 amps? Ans: ✓ ✓ ✓ D
.2300
How are fuses sized? Ans: ✓ ✓ ✓ D .Both A and B
What is generally considered the maximum allowable supply voltage variation Ans: ✓ ✓ ✓ A.5%
Capacitors are rated in: Ans: ✓ ✓ ✓ D .Both B and C
What is the term used to describe the output side of a transformer? Ans: ✓ ✓ ✓ D .Secondary side
One horsepower is equal to ______ watts. Ans: ✓ ✓ ✓ B. 746
A parallel circuit contains an 18 ohm and a 9 ohm resistor. What is the total resistance? Ans: ✓ ✓ ✓
A.6 ohms
In a series circuit, the voltage drop across each load will: Ans: ✓ ✓ ✓ D .Add up to equal the source
voltage
Which of the following is equal to 2.1kW? Ans: ✓ ✓ ✓ c .2100 watts
A capacitor analyzer is designed to check: Ans: ✓ ✓ ✓ D .The capacitance of the a capacitor
On an electronic oil safety switch, what changes the pressure signal to an electrical signal? Ans: ✓
✓ ✓ A.Transducer
A three phase load requires a minimum of Ans: ✓ ✓ ✓ A.Three supply lines
An electronically commutated motor (ECM) is designed to: Ans: ✓ ✓ ✓ D .Provide proper airflow
under various conditions
Resistance can be calculated by: Ans: ✓ ✓ ✓ A.E divided by I
© Get it right 2025 Getaway - Stuvia US All rights reserved
