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