HVAC Excellence - ELECTRICITY Exam
Questions and Answers11
Two 120 volt incandescent light bulbs are wired in series, one is a 60 watt bulb, the other is a 4
watt bulb. The result would be - ANSWERS -both bulbs light
A 240 Volt, 3 wire circuit can be split into two 120 Volt circuits. - ANSWERS -TRUE
Which of the following in not a factor in determining impedance in an AC circuit? - ANSWERS -
Frequency
When current flows, a _______________ is produced around the conductor. - ANSWERS -
magnetic field
Technician #1 says that an open transformer coil is indicated by a reading of infinity on an
analog ohmmeter.
Technician #2 says that a shorted transformer coil is indicated by a reading of infinity on an
analog ohmmeter.
Which technician is correct, or are both technicians correct? - ANSWERS -Technician #2 only
The terminals T1, T2, & T3 are located at the _______ of a contactor. - ANSWERS -top
Circuit fuses and breakers are primarily used to protect - ANSWERS -loads
, Current flow is: - ANSWERS -The flow of electrons in the circuit.
Impedance is: - ANSWERS -Opposition to alternating current flow.
Like charges; - ANSWERS -repel each other.
Any material that will readily release electrons is called; - ANSWERS -A conductor
The symbol for current is; - ANSWERS -I
Which of the following materials would be best suited for use as a semi-conductor? - ANSWERS
-silicon
The safety ground conductor is usually color coded; - ANSWERS -green or bare.
An electron has; - ANSWERS -a negative charge.
Resistance is: - ANSWERS -Opposition to current flow.
How many watts of power are used by a heater operating at 240 volts and drawing 5 amps? -
ANSWERS -1200 watts
Which of the following meters must use its internal power to check a load or circuit? - ANSWERS
-Ohmmeter
In electrical wiring, a black colored wire in an alternating current circuit usually indicates; -
ANSWERS -the hot conductor.
Questions and Answers11
Two 120 volt incandescent light bulbs are wired in series, one is a 60 watt bulb, the other is a 4
watt bulb. The result would be - ANSWERS -both bulbs light
A 240 Volt, 3 wire circuit can be split into two 120 Volt circuits. - ANSWERS -TRUE
Which of the following in not a factor in determining impedance in an AC circuit? - ANSWERS -
Frequency
When current flows, a _______________ is produced around the conductor. - ANSWERS -
magnetic field
Technician #1 says that an open transformer coil is indicated by a reading of infinity on an
analog ohmmeter.
Technician #2 says that a shorted transformer coil is indicated by a reading of infinity on an
analog ohmmeter.
Which technician is correct, or are both technicians correct? - ANSWERS -Technician #2 only
The terminals T1, T2, & T3 are located at the _______ of a contactor. - ANSWERS -top
Circuit fuses and breakers are primarily used to protect - ANSWERS -loads
, Current flow is: - ANSWERS -The flow of electrons in the circuit.
Impedance is: - ANSWERS -Opposition to alternating current flow.
Like charges; - ANSWERS -repel each other.
Any material that will readily release electrons is called; - ANSWERS -A conductor
The symbol for current is; - ANSWERS -I
Which of the following materials would be best suited for use as a semi-conductor? - ANSWERS
-silicon
The safety ground conductor is usually color coded; - ANSWERS -green or bare.
An electron has; - ANSWERS -a negative charge.
Resistance is: - ANSWERS -Opposition to current flow.
How many watts of power are used by a heater operating at 240 volts and drawing 5 amps? -
ANSWERS -1200 watts
Which of the following meters must use its internal power to check a load or circuit? - ANSWERS
-Ohmmeter
In electrical wiring, a black colored wire in an alternating current circuit usually indicates; -
ANSWERS -the hot conductor.
