ELECTRIC MOTOR CONTROL SYSTEMS C202 SACA GOLD EXAM
QUESTIONS AND ANSWERS
Grounding - CORRECT ANSWER✅✅To provide a low-resistance path for fault current, ensuring safety
and protecting equipment.
Common standards associated with electrical control - CORRECT ANSWER✅✅NEMA, IEC, and NEC
standards.
Ten basic rules of electrical safety - CORRECT ANSWER✅✅Includes de-energizing circuits, using PPE,
verifying lockout/tagout, testing before touch, and using insulated tools, among others.
Lockout/tagout system order - CORRECT ANSWER✅✅Notify, shut down, isolate energy, apply LOTO
device, release stored energy, and verify zero energy.
Three-phase power operation - CORRECT ANSWER✅✅Three AC voltages 120° out of phase provide
continuous power with higher efficiency.
Function of neutral in electrical power - CORRECT ANSWER✅✅Serves as a return path for current in
unbalanced systems and maintains voltage stability.
Using a digital multimeter - CORRECT ANSWER✅✅Set the function (volts, ohms, etc.), connect leads
properly, and read measurements.
Grounded and ungrounded systems - CORRECT ANSWER✅✅Grounded systems have one conductor
connected to ground for safety; ungrounded systems do not, which can delay fault detection.
Overcurrent protection devices - CORRECT ANSWER✅✅Fuses melt under excess current; breakers trip;
overloads respond to sustained heat or current.
Three-phase motor operation - CORRECT ANSWER✅✅Uses rotating magnetic fields from three-phase
power to turn the rotor.
, Interpreting motor's nameplate data - CORRECT ANSWER✅✅Includes voltage, current, RPM, phase,
service factor, and efficiency.
Connecting dual-voltage three-phase motor - CORRECT ANSWER✅✅Use parallel connection for low
voltage (e.g., 230V) and series for high voltage (e.g., 460V).
Functions of motor control - CORRECT ANSWER✅✅Starting, stopping, reversing, speed control, and
overload protection.
Motor control relay circuit interpretation - CORRECT ANSWER✅✅Understand how control relays
activate coils and change contact states to control the motor.
Operation of different types of motor starters - CORRECT ANSWER✅✅Manual, magnetic, and solid-
state starters vary by control type and application.
Low-voltage protection - CORRECT ANSWER✅✅Shuts off the motor if voltage drops and prevents
automatic restart when voltage returns.
Types of motor overload devices - CORRECT ANSWER✅✅Thermal (bimetallic), magnetic, and electronic
overloads.
Motor control and transformer schematic symbols - CORRECT ANSWER✅✅Symbols represent
transformer coils, cores, and taps.
Operation of transformers - CORRECT ANSWER✅✅Transfers electrical energy between circuits via
electromagnetic induction.
Turns ratio and secondary voltage of a transformer - CORRECT ANSWER✅✅Secondary voltage =
(Primary Voltage) × (Secondary Turns / Primary Turns).
QUESTIONS AND ANSWERS
Grounding - CORRECT ANSWER✅✅To provide a low-resistance path for fault current, ensuring safety
and protecting equipment.
Common standards associated with electrical control - CORRECT ANSWER✅✅NEMA, IEC, and NEC
standards.
Ten basic rules of electrical safety - CORRECT ANSWER✅✅Includes de-energizing circuits, using PPE,
verifying lockout/tagout, testing before touch, and using insulated tools, among others.
Lockout/tagout system order - CORRECT ANSWER✅✅Notify, shut down, isolate energy, apply LOTO
device, release stored energy, and verify zero energy.
Three-phase power operation - CORRECT ANSWER✅✅Three AC voltages 120° out of phase provide
continuous power with higher efficiency.
Function of neutral in electrical power - CORRECT ANSWER✅✅Serves as a return path for current in
unbalanced systems and maintains voltage stability.
Using a digital multimeter - CORRECT ANSWER✅✅Set the function (volts, ohms, etc.), connect leads
properly, and read measurements.
Grounded and ungrounded systems - CORRECT ANSWER✅✅Grounded systems have one conductor
connected to ground for safety; ungrounded systems do not, which can delay fault detection.
Overcurrent protection devices - CORRECT ANSWER✅✅Fuses melt under excess current; breakers trip;
overloads respond to sustained heat or current.
Three-phase motor operation - CORRECT ANSWER✅✅Uses rotating magnetic fields from three-phase
power to turn the rotor.
, Interpreting motor's nameplate data - CORRECT ANSWER✅✅Includes voltage, current, RPM, phase,
service factor, and efficiency.
Connecting dual-voltage three-phase motor - CORRECT ANSWER✅✅Use parallel connection for low
voltage (e.g., 230V) and series for high voltage (e.g., 460V).
Functions of motor control - CORRECT ANSWER✅✅Starting, stopping, reversing, speed control, and
overload protection.
Motor control relay circuit interpretation - CORRECT ANSWER✅✅Understand how control relays
activate coils and change contact states to control the motor.
Operation of different types of motor starters - CORRECT ANSWER✅✅Manual, magnetic, and solid-
state starters vary by control type and application.
Low-voltage protection - CORRECT ANSWER✅✅Shuts off the motor if voltage drops and prevents
automatic restart when voltage returns.
Types of motor overload devices - CORRECT ANSWER✅✅Thermal (bimetallic), magnetic, and electronic
overloads.
Motor control and transformer schematic symbols - CORRECT ANSWER✅✅Symbols represent
transformer coils, cores, and taps.
Operation of transformers - CORRECT ANSWER✅✅Transfers electrical energy between circuits via
electromagnetic induction.
Turns ratio and secondary voltage of a transformer - CORRECT ANSWER✅✅Secondary voltage =
(Primary Voltage) × (Secondary Turns / Primary Turns).
