Esco Electrical Test
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
A three phase load requires a minimum of -✅✅-A.Three supply lines
An electronically commutated motor (ECM) is designed to: - ✅✅-D .Provide proper
airflow under various conditions
Resistance can be calculated by: - ✅✅-A.E divided by I
The total resistance in a parallel circuit will be: - ✅✅-D .Less than the smallest
resistance
Which of the following statements about current is true? - ✅✅-B.Current flow will
increase when voltage increases
When resistors are wired parallel: - ✅✅ -B.The voltage drop across each resistor
will be the same as the applied source voltage
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
A three phase load requires a minimum of -✅✅-A.Three supply lines
An electronically commutated motor (ECM) is designed to: - ✅✅-D .Provide proper
airflow under various conditions
Resistance can be calculated by: - ✅✅-A.E divided by I
The total resistance in a parallel circuit will be: - ✅✅-D .Less than the smallest
resistance
Which of the following statements about current is true? - ✅✅-B.Current flow will
increase when voltage increases
When resistors are wired parallel: - ✅✅ -B.The voltage drop across each resistor
will be the same as the applied source voltage
