CBRE 2025
Choose correct regarding Ohm's law: - answer If you read 20 Amps on a 10 Ohm
circuit, voltage equals 200.
Voltage divided by current equals resistance.
A 120 volt circuit drawing 12 amps has 10 Ohms of resistance.
"I" is the symbol for Current.
Choose the correct answer regarding Motor Control Centers: - answer Contacts in
Normally Closed contactor, in a de-energized condition, will conduct electricity.
"Heaters" are overload components of contactors.
Pitting in contact surfaces is commonly caused by electrical arcing.
(Electrical Arcing) - when electric current flows through air gap.
What is a Branch Circuit? - answer Circuit conductor between the final over-current
device protecting the circuit and outlet.
Choose the correct answer regarding Light Bulbs: - answerThe term "Kelvin" relates to
the color of the light given by the lamp.
When installing a Halogen lamp, you must never touch the lamp with your bare fingers.
All florescent lamps contain a small amount of Mercury.
"HID" stands for High Intensity Discharge.
Choose the correct answer regarding lighting controls: - answer"SPST" stands for
"Single-Pole, Single-Throw"
Choose the correct answer regarding multi-meters: - answerWhen reading resistance,
the meter should be set to "Ohms"
Choose the correct answer regarding branch circuits: - answerTo offset the effects of
harmonics, an oversized neutral may be installed.
Harmonics - disortion of a sinusoidal wave form.
Choose the correct answer regarding electrical theory: - answerAtoms are made up of
Photons, Neutrons and Free Electrons.
When a conductor is moved through a magnetic field, magnetic flux is induced in a
circuit.
Choose the correct answer regarding electrical maintenance: - answerContactor wire
terminals can loosen over time and cause arching.
Excessive transformer heat may indicate an unbalanced load.
, What is the voltage read between one leg of 480v - 3 phase and ground on Wye
Connected Transformer? - answer277.
On a 3-Phase motor, what would you do in order to change rotational direction of
motor? - answerSwitch any two leads.
What might be the cause of high running amps on an air handler? - answerToo tight of a
belt.
What is the term for the motor amperage while the shaft is standing still? -
answerLocked rotor amps.
If you take an Ohm reading across contacts of a Normally Closed set of contacts, and
get continuity, is the coil? - answerDe-engergized.
If you read voltage with a voltmeter across a fuse while it is still installed, is the fuse? -
answerOpen.
A megger is used for measuring? - answerMotor winding insulation resistance.
What gauge wire would you install in a 120 Votl, 20 Amp circuit? - answer12 awg.
A transformer that converts 480V input voltage to 208/120 V output voltage is called? -
answerStep down transformer.
When using a clamp-on ammeter, what is the maximum number of wires you can have
in the jaws at one time? - answer1.
What unit is the capacitance of a capacitor measured in? - answerFarads.
Solve for kilowatts: 120 volt motor drawing 19 amps using Ohms or Watts Law: -
answer2.28
If you have a step-down transformer and one voltage measured is 480 volts, and the
other measured voltage is 208 volt, which voltage is your primary voltage? - answer480.
Identify at least two independent faults that would cause a motor not to start? -
answerBlown fuse, Open switch
What is the purpose of a retentive timer? - answerMaintain accumulated time until reset.
An on delay timer? - answerCloses contacts after set point is achieved.
An off delay timer? - answerOpens contacts after set point is achieved.
Choose correct regarding Ohm's law: - answer If you read 20 Amps on a 10 Ohm
circuit, voltage equals 200.
Voltage divided by current equals resistance.
A 120 volt circuit drawing 12 amps has 10 Ohms of resistance.
"I" is the symbol for Current.
Choose the correct answer regarding Motor Control Centers: - answer Contacts in
Normally Closed contactor, in a de-energized condition, will conduct electricity.
"Heaters" are overload components of contactors.
Pitting in contact surfaces is commonly caused by electrical arcing.
(Electrical Arcing) - when electric current flows through air gap.
What is a Branch Circuit? - answer Circuit conductor between the final over-current
device protecting the circuit and outlet.
Choose the correct answer regarding Light Bulbs: - answerThe term "Kelvin" relates to
the color of the light given by the lamp.
When installing a Halogen lamp, you must never touch the lamp with your bare fingers.
All florescent lamps contain a small amount of Mercury.
"HID" stands for High Intensity Discharge.
Choose the correct answer regarding lighting controls: - answer"SPST" stands for
"Single-Pole, Single-Throw"
Choose the correct answer regarding multi-meters: - answerWhen reading resistance,
the meter should be set to "Ohms"
Choose the correct answer regarding branch circuits: - answerTo offset the effects of
harmonics, an oversized neutral may be installed.
Harmonics - disortion of a sinusoidal wave form.
Choose the correct answer regarding electrical theory: - answerAtoms are made up of
Photons, Neutrons and Free Electrons.
When a conductor is moved through a magnetic field, magnetic flux is induced in a
circuit.
Choose the correct answer regarding electrical maintenance: - answerContactor wire
terminals can loosen over time and cause arching.
Excessive transformer heat may indicate an unbalanced load.
, What is the voltage read between one leg of 480v - 3 phase and ground on Wye
Connected Transformer? - answer277.
On a 3-Phase motor, what would you do in order to change rotational direction of
motor? - answerSwitch any two leads.
What might be the cause of high running amps on an air handler? - answerToo tight of a
belt.
What is the term for the motor amperage while the shaft is standing still? -
answerLocked rotor amps.
If you take an Ohm reading across contacts of a Normally Closed set of contacts, and
get continuity, is the coil? - answerDe-engergized.
If you read voltage with a voltmeter across a fuse while it is still installed, is the fuse? -
answerOpen.
A megger is used for measuring? - answerMotor winding insulation resistance.
What gauge wire would you install in a 120 Votl, 20 Amp circuit? - answer12 awg.
A transformer that converts 480V input voltage to 208/120 V output voltage is called? -
answerStep down transformer.
When using a clamp-on ammeter, what is the maximum number of wires you can have
in the jaws at one time? - answer1.
What unit is the capacitance of a capacitor measured in? - answerFarads.
Solve for kilowatts: 120 volt motor drawing 19 amps using Ohms or Watts Law: -
answer2.28
If you have a step-down transformer and one voltage measured is 480 volts, and the
other measured voltage is 208 volt, which voltage is your primary voltage? - answer480.
Identify at least two independent faults that would cause a motor not to start? -
answerBlown fuse, Open switch
What is the purpose of a retentive timer? - answerMaintain accumulated time until reset.
An on delay timer? - answerCloses contacts after set point is achieved.
An off delay timer? - answerOpens contacts after set point is achieved.
