Esco Electrical Test (Answered) 100
Questions and Correct Answers, Updated
2025/2026.
What is current flow?
D.The flow of electrons in a circuit
What is impedance?
A.Opposition to alternating current
Like charges will
B.Repel each other
Any material that will readily release electrons is called:
B.A conductor
The symbol for current is:
B. I
Electricity can produce:
D. All the above
light
heat
magnetism
The safety ground conductor is usually colored:
B.Green
An electron has:
B.A negative charge
Which of the following materials would be best suited for use as a semi-conductor?
D.Silicon
Which of the following meters must use internal power to check a load or circuit?
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?
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?
, C. 2880
When testing a capacitor with an analog or digital ohmmeter, the meter should:
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?
A.60 ohms
What is resistance?
A.Opposition to electron flow
In electrical wiring, a black colored wire indicates:
A. A hot conductor
How many watts are used by a heater operating on 460 volts and drawing 5 amps?
D .2300
How are fuses sized?
D .Both A and B
What is generally considered the maximum allowable supply voltage variation
A.5%
Capacitors are rated in:
D .Both B and C
What is the term used to describe the output side of a transformer?
D .Secondary side
One horsepower is equal to ______ watts.
B. 746
A parallel circuit contains an 18 ohm and a 9 ohm resistor. What is the total resistance?
A.6 ohms
In a series circuit, the voltage drop across each load will:
D .Add up to equal the source voltage
Which of the following is equal to 2.1kW?
c .2100 watts
A capacitor analyzer is designed to check:
D .The capacitance of the a capacitor
On an electronic oil safety switch, what changes the pressure signal to an electrical signal?
A.Transducer
Questions and Correct Answers, Updated
2025/2026.
What is current flow?
D.The flow of electrons in a circuit
What is impedance?
A.Opposition to alternating current
Like charges will
B.Repel each other
Any material that will readily release electrons is called:
B.A conductor
The symbol for current is:
B. I
Electricity can produce:
D. All the above
light
heat
magnetism
The safety ground conductor is usually colored:
B.Green
An electron has:
B.A negative charge
Which of the following materials would be best suited for use as a semi-conductor?
D.Silicon
Which of the following meters must use internal power to check a load or circuit?
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?
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?
, C. 2880
When testing a capacitor with an analog or digital ohmmeter, the meter should:
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?
A.60 ohms
What is resistance?
A.Opposition to electron flow
In electrical wiring, a black colored wire indicates:
A. A hot conductor
How many watts are used by a heater operating on 460 volts and drawing 5 amps?
D .2300
How are fuses sized?
D .Both A and B
What is generally considered the maximum allowable supply voltage variation
A.5%
Capacitors are rated in:
D .Both B and C
What is the term used to describe the output side of a transformer?
D .Secondary side
One horsepower is equal to ______ watts.
B. 746
A parallel circuit contains an 18 ohm and a 9 ohm resistor. What is the total resistance?
A.6 ohms
In a series circuit, the voltage drop across each load will:
D .Add up to equal the source voltage
Which of the following is equal to 2.1kW?
c .2100 watts
A capacitor analyzer is designed to check:
D .The capacitance of the a capacitor
On an electronic oil safety switch, what changes the pressure signal to an electrical signal?
A.Transducer
