CONTROL SYSTEMS TEST BANK
2026 COMPREHENSIVE QUESTIONS
AND ACCURATE SOLUTIONS
VERIFIED
◉ The __________ is the accepted standard in the United States for
safely installing and maintaining electrical systems and equipment.
Answer: NEC
◉ Which of the following is not a basic rule of electrical safety?
Answer: Always work by yourself
◉ Who should remove a lockout/tagout? Answer: Only the person(s)
who installed it
◉ Three-phase power is transmitted in phases that are __________
degrees apart. Answer: 120
◉ Which of the following is not a common voltage supplied by a wye-
configured system? Answer: 240 VAC
◉ A grounded neutral wire can be used as an equipment ground.
Answer: false
,◉ A ground fault occurs when __________. Answer: one of the phases
becomes grounded
◉ A fusible disconnect includes what? Answer: Fuses, Manually
operated switch, Enclosure.
◉ A time-delay fuse only has one element. Answer: False
◉ Which of the following is a factor that must be considered when
selecting overcurrent protection devices for a motor control circuit?
Answer: Rated full-load current of the motor
◉ Which of the following is a component of a typical three-phase
squirrel-cage motor? Answer: Copper bars, End rings, Iron core
◉ Which of the following items on a motor's nameplate is used to
determine how much output power a motor can safely produce above its
rated output power? Answer: Service Factor
◉ If the service factor for a motor is not given on the nameplate, what
should you assume the service factor to be? Answer: 1
◉ Which of the following is not a result of connecting a dual-voltage
motor to operate on the higher voltage? Answer: Increased current draw
, ◉ What are the functions of motor control? Answer: Speed control,
reversing, start/stop control.
◉ A motor starter is the same as a motor controller. Answer: False
◉ Magnetic contactors open and close their contacts through the use of a
magnetic coil. Answer: True
◉ The type of manual starter used for three-phase motors is a
__________. Answer: integral horsepower starter
◉ The contacts of a manual starter will remain in the actuated position
when power is lost. Answer: True
◉ __________ protection on a manual starter will prevent the automatic
restart of a motor when recovering from a power loss. Answer:
Undervoltage
◉ Some manual motor starters use a special sensing coil that verifies the
presence of incoming voltage to open the starter contacts when the
voltage is below a preset level. Answer: True
◉ Which type of overload uses a coil to sense the level of motor
current? Answer: Magnetic overload