Relays are generally used to control inductive loads up to ________ amps. - ANSWER 10
Resistance is: - ANSWER Opposition to current flow.
One horsepower is equal to _______ watts - ANSWER 746
When troubleshooting the A/C system in the schematic (during operation), the following conditions ...
Relays are generally used to control inductive loads up to ________ amps. - ANSWER 10
Resistance is: - ANSWER Opposition to current flow.
One horsepower is equal to _______ watts - ANSWER 746
When troubleshooting the A/C system in the schematic (during operation), 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; - ANSWER A faulty thermostat
- AUTO/FAN ON switch.
An ohmmeter should never be connected to a; - ANSWER Charged capacitor until it has been discharged.
The thermal overload contacts on a line starter are usually ___ reset. - ANSWER manual
What charges the pressure signal in an electronic oil safety switch to an electrical signal? - ANSWER
Transducer.
In the schematic, what voltage would be found from terminal Y to the output side of the coil on line #11?
(Assume the thermostat is in the closed position and the fan is set to AUTO.) - ANSWER 24 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 are not running. The blower motor is
running. This could be caused by; - ANSWER An open HP, LP, overloads, or oil pressure switch line (line
#11).
, Which of the following motors is most energy efficient. - ANSWER ECM.
Circuit breakers & fuses are primarily used to provide; - ANSWER Protection from an overloads current.
The voltage to ground of a High Leg or Stinger Leg on a three phase open Delta system will be
approximately; - ANSWER 208 V
In the schematic, what voltage would be found from terminal G to the load side of the transformer?
(Assume the thermostat is in the closed position and the fan is set to AUTO.) - ANSWER 0 volts.
When checking the windings of a three phase motor; - ANSWER all three terminals should show the
same resistance.
A device with overload protection used to control a motor is a; - ANSWER direct on line starter.
To change direction of rotation of a three phase motor; - ANSWER change the position of any two supply
wires.
The symbol for a heating thermostat is represented by diagram ____ - ANSWER B
The electric meter on a house measures the _______ passing through it. - ANSWER Wattage
In the schematic, what voltage would be found across the fuse in line #10? (Assume the thermostat is in
the closed position and the fan is set to AUTO.) - ANSWER 0 volts.
An electron has; - ANSWER a negative charge.
If the conductor in an AC circuit is wound into a coil, the resulting EMF opposes the supply voltage. This
opposition is called; - ANSWER inductive resistance.
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