Electrical Exam Study Guide 2024
1. Relays are generally used to control inductive loads up to amps.-
Ans: 10
2. Resistance is Ans: Opposition to current flow.
3. One horsepower is equal to___________ watts Ans: 746
4. When troubleshooting the A/C system in the schematic (during
closed. The
operation), the following conditions are found. The thermostat wer motor is
contacts are m the AUTO
aused by;
compressor and condenser fan motors are short cycling.The blo not Ans: A
running. When the fan switch at the thermostat is moved fro position
to the FAN ON position, the blower runs.This could be c faulty thermostat -
AUTO/FAN ON switch.
5. An ohmmeter should never be connected to a; Ans: Charged capacitor until it has
been discharged.
6. The thermal overload contacts on a line starter are usually reset. Ans:
man- ual
7. What charges the pressure signal in an electronic oil safety switch to an
electrical signal? Ans: Transducer. to the output
8. In the schematic, what voltage would be found from terminal Y sideosed position
of the coil on line #11? (Assume the thermostat is in the cl and the fan
is set to AUTO.) Ans: 24 volts.
9. When troubleshooting the A/C system in the schematic, the fo ditions llowing con-
pressor and
are found. The thermostat contacts are closed. The com condenser fan s could be
are not running. The blower motor is running. Thi caused by; Ans: An ne #11).
1/
11
, open HP, LP, overloads, or oil pressure switch line (li
10. Which of the following motors is most energy efficient. Ans: ECM.
11. Circuit breakers & fuses are primarily used to provide; Ans: Protection from an
overloads current.
12. The voltage to ground of a High Leg or Stinger Leg on a three phase open Delta
system will be approximately; Ans: 208 V G to the load
13. In the schematic, what voltage would be found from terminal side position and
of the transformer? (Assume the thermostat is in the closed the fan is set
to AUTO.) Ans: 0 volts.
14. When checking the windings of a three phase motor; Ans: all three terminals
should show the same resistance.
15. A device with overload protection used to control a motor is a; Ans: direct on
line starter.
16. To change direction of rotation of a three phase motor; Ans: change the position of
any two supply wires. am______ B
17. The symbol for a heating thermostat is represented by diagr
2/
11
1. Relays are generally used to control inductive loads up to amps.-
Ans: 10
2. Resistance is Ans: Opposition to current flow.
3. One horsepower is equal to___________ watts Ans: 746
4. When troubleshooting the A/C system in the schematic (during
closed. The
operation), the following conditions are found. The thermostat wer motor is
contacts are m the AUTO
aused by;
compressor and condenser fan motors are short cycling.The blo not Ans: A
running. When the fan switch at the thermostat is moved fro position
to the FAN ON position, the blower runs.This could be c faulty thermostat -
AUTO/FAN ON switch.
5. An ohmmeter should never be connected to a; Ans: Charged capacitor until it has
been discharged.
6. The thermal overload contacts on a line starter are usually reset. Ans:
man- ual
7. What charges the pressure signal in an electronic oil safety switch to an
electrical signal? Ans: Transducer. to the output
8. In the schematic, what voltage would be found from terminal Y sideosed position
of the coil on line #11? (Assume the thermostat is in the cl and the fan
is set to AUTO.) Ans: 24 volts.
9. When troubleshooting the A/C system in the schematic, the fo ditions llowing con-
pressor and
are found. The thermostat contacts are closed. The com condenser fan s could be
are not running. The blower motor is running. Thi caused by; Ans: An ne #11).
1/
11
, open HP, LP, overloads, or oil pressure switch line (li
10. Which of the following motors is most energy efficient. Ans: ECM.
11. Circuit breakers & fuses are primarily used to provide; Ans: Protection from an
overloads current.
12. The voltage to ground of a High Leg or Stinger Leg on a three phase open Delta
system will be approximately; Ans: 208 V G to the load
13. In the schematic, what voltage would be found from terminal side position and
of the transformer? (Assume the thermostat is in the closed the fan is set
to AUTO.) Ans: 0 volts.
14. When checking the windings of a three phase motor; Ans: all three terminals
should show the same resistance.
15. A device with overload protection used to control a motor is a; Ans: direct on
line starter.
16. To change direction of rotation of a three phase motor; Ans: change the position of
any two supply wires. am______ B
17. The symbol for a heating thermostat is represented by diagr
2/
11
