HVAC EXCELLENCE EVALUATION TEST UPDATED EXAM
QUESTIONS AND SOLUTIONS RATED A+
✔✔The symbol for a pressure switch that closes on pressure rise represented by
diagram - ✔✔A
✔✔The symbol for a pressure switch that opens on pressure rise is represented by
diagram. - ✔✔C
✔✔In the schematic, what voltage would be found across L1 to L2? - ✔✔240 volts.
✔✔In the schematic, what voltage would be found across the condenser fan motor? -
✔✔O volts,
✔✔In the schematic, what voltage would be found across the transformer primary? -
✔✔240 volts.
✔✔In the schematic, what voltage would be found across the fuse in line #10 with the
thermostat closed? - ✔✔0 volts.
✔✔In the schematic, what voltage would be found from terminal G to the load side of
the transformer? - ✔✔0 volts
✔✔In the schematic, what voltage would be found across the contacts when energized
in line #8 - ✔✔0 volts.
✔✔In the schematic, what voltage would be found from terminal Y to the input side of
the coil on line #11? - ✔✔0 volts.
✔✔In the schematic, what voltage would be found from terminal Y to the output side of
the coil on line #11? - ✔✔0 volts
✔✔When troubleshooting the A/C system in the schematic, the following conditions are
found. The thermostat contacts are closed. The compressor and condenser fan motors
are short cycling. The blower motor is not running. This could be caused by. - ✔✔a
faulty blower motor or blower relay.
✔✔When troubleshooting the A/C system in the schematic, the following conditions are
found. The thermostat contacts are closed. The compressor and condenser fan are not
running. The blower motor is running. This could be caused by. - ✔✔the HP, LP,
overloads, or oil pressure switch are open (line #11).
, ✔✔When troubleshooting the A/C system in the schematic, the following conditions are
found. The thermostat contacts are closed. The compressor and condenser fan motors
are short cycling. The blower motor is not running. When the fan switch at the
thermostat is moved from the AUTO position to the FAN ON position, the blower runs.
This could be caused by. - ✔✔a faulty thermostat - AUTO / FAN ON switch.
✔✔In the schematic, the crankcase heater will operate; - ✔✔when the compressor is
off.
✔✔in the schematic, the coil on line #11 does NOT control. - ✔✔the blower motor.
✔✔In the schematic, the coil on line #12 controls the. - ✔✔blower motor relay.
✔✔In the schematic, if the fuse in L2 is blown the. - ✔✔blower motor will continue to
operate.
✔✔In the schematic, with the thermostat bulb closed, what voltage would be found from
Terminal Y to the Common side of the Contactor Coil on Line #11? - ✔✔24 Volts
✔✔In the schematic, with the thermostat bulb closed and the fan switch in the AUTO
position, what voltage would be found from Terminal R to Terminal G on the
Thermostat? - ✔✔24 Volts
✔✔How many Watts of Power are used by a heater operating at 460 Volts and drawing
5 Amps? - ✔✔2,300 Watts
✔✔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 - ✔✔both bulbs light
✔✔A 240 Volt, 3 wire circuit can be split into two 120 Volt circuits. - ✔✔TRUE
✔✔Which of the following in not a factor in determining impedance in an AC circuit? -
✔✔Frequency
✔✔When current flows, a _______________ is produced around the conductor. -
✔✔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.
QUESTIONS AND SOLUTIONS RATED A+
✔✔The symbol for a pressure switch that closes on pressure rise represented by
diagram - ✔✔A
✔✔The symbol for a pressure switch that opens on pressure rise is represented by
diagram. - ✔✔C
✔✔In the schematic, what voltage would be found across L1 to L2? - ✔✔240 volts.
✔✔In the schematic, what voltage would be found across the condenser fan motor? -
✔✔O volts,
✔✔In the schematic, what voltage would be found across the transformer primary? -
✔✔240 volts.
✔✔In the schematic, what voltage would be found across the fuse in line #10 with the
thermostat closed? - ✔✔0 volts.
✔✔In the schematic, what voltage would be found from terminal G to the load side of
the transformer? - ✔✔0 volts
✔✔In the schematic, what voltage would be found across the contacts when energized
in line #8 - ✔✔0 volts.
✔✔In the schematic, what voltage would be found from terminal Y to the input side of
the coil on line #11? - ✔✔0 volts.
✔✔In the schematic, what voltage would be found from terminal Y to the output side of
the coil on line #11? - ✔✔0 volts
✔✔When troubleshooting the A/C system in the schematic, the following conditions are
found. The thermostat contacts are closed. The compressor and condenser fan motors
are short cycling. The blower motor is not running. This could be caused by. - ✔✔a
faulty blower motor or blower relay.
✔✔When troubleshooting the A/C system in the schematic, the following conditions are
found. The thermostat contacts are closed. The compressor and condenser fan are not
running. The blower motor is running. This could be caused by. - ✔✔the HP, LP,
overloads, or oil pressure switch are open (line #11).
, ✔✔When troubleshooting the A/C system in the schematic, the following conditions are
found. The thermostat contacts are closed. The compressor and condenser fan motors
are short cycling. The blower motor is not running. When the fan switch at the
thermostat is moved from the AUTO position to the FAN ON position, the blower runs.
This could be caused by. - ✔✔a faulty thermostat - AUTO / FAN ON switch.
✔✔In the schematic, the crankcase heater will operate; - ✔✔when the compressor is
off.
✔✔in the schematic, the coil on line #11 does NOT control. - ✔✔the blower motor.
✔✔In the schematic, the coil on line #12 controls the. - ✔✔blower motor relay.
✔✔In the schematic, if the fuse in L2 is blown the. - ✔✔blower motor will continue to
operate.
✔✔In the schematic, with the thermostat bulb closed, what voltage would be found from
Terminal Y to the Common side of the Contactor Coil on Line #11? - ✔✔24 Volts
✔✔In the schematic, with the thermostat bulb closed and the fan switch in the AUTO
position, what voltage would be found from Terminal R to Terminal G on the
Thermostat? - ✔✔24 Volts
✔✔How many Watts of Power are used by a heater operating at 460 Volts and drawing
5 Amps? - ✔✔2,300 Watts
✔✔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 - ✔✔both bulbs light
✔✔A 240 Volt, 3 wire circuit can be split into two 120 Volt circuits. - ✔✔TRUE
✔✔Which of the following in not a factor in determining impedance in an AC circuit? -
✔✔Frequency
✔✔When current flows, a _______________ is produced around the conductor. -
✔✔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.
