CONTROL SYSTEMS EXAM QUESTIONS
AND ANSWERS 100% PASS 2026/2027
Grounding - ANS To provide a low-resistance path for fault current, ensuring safety and
protecting equipment.
Common standards associated with electrical control - ANS NEMA, IEC, and NEC standards.
Ten basic rules of electrical safety - ANS Includes de-energizing circuits, using PPE, verifying
lockout/tagout, testing before touch, and using insulated tools, among others.
Lockout/tagout system order - ANS Notify, shut down, isolate energy, apply LOTO device,
release stored energy, and verify zero energy.
Three-phase power operation - ANS Three AC voltages 120° out of phase provide continuous
power with higher efficiency.
Function of neutral in electrical power - ANS Serves as a return path for current in
unbalanced systems and maintains voltage stability.
@2026 ALLRIGHTS RESERVED 1
, Using a digital multimeter - ANS Set the function (volts, ohms, etc.), connect leads properly,
and read measurements.
Grounded and ungrounded systems - ANS Grounded systems have one conductor connected
to ground for safety; ungrounded systems do not, which can delay fault detection.
Overcurrent protection devices - ANS Fuses melt under excess current; breakers trip;
overloads respond to sustained heat or current.
Three-phase motor operation - ANS Uses rotating magnetic fields from three-phase power to
turn the rotor.
Interpreting motor's nameplate data - ANS Includes voltage, current, RPM, phase, service
factor, and efficiency.
Connecting dual-voltage three-phase motor - ANS Use parallel connection for low voltage
(e.g., 230V) and series for high voltage (e.g., 460V).
Functions of motor control - ANS Starting, stopping, reversing, speed control, and overload
protection.
Motor control relay circuit interpretation - ANS Understand how control relays activate coils
and change contact states to control the motor.
Operation of different types of motor starters - ANS Manual, magnetic, and solid-state
starters vary by control type and application.
@2026 ALLRIGHTS RESERVED 2