NCCER Electrical Level 2 – Module 11: Control Systems and
Fundamental Concepts Questions and Answers Latest
Version 2025–2026 100% Verified
Introduction:
This verified 2025–2026 study resource for NCCER Electrical Level 2
Module 11 covers Control Systems and Fundamental Concepts with
complete questions and answers. It explains the principles of open-
loop and closed-loop control, PID controllers, sensors, actuators,
relays, control panels, and industrial automation components. The
document also includes key concepts such as feedback, system
stability, tuning, and control algorithms, making it ideal for students
and apprentices preparing for NCCER certification exams.
Exam Questions and Answers
Melting alloy in bimetallic overload relays are designed to ---
correct answer ---Approx. heat generated in motor
The contactor action is dependent on current flow the contactor is
described as --- correct answer ---Electrically held
The location of all lighting fixtures is shown on the --- correct
answer ---Floor plan
Remote control wiring shall be installed in accordance with ---
correct answer ---NEC article 725, class 2
,The operating coil is designed to operate the relay at what
percentage of rated voltage --- correct answer ---80% to 110%
Contacts that are together when the relay is deenergized are said to
be --- correct answer ---Normally closed
The low voltage panel enclosure should be installed --- correct
answer ---Eye level between two studs
In Opto-isolate solid state relay is activated by --- correct answer --
-Light
Emergency lighting circuits often use --- correct answer ---
Magnetic relays
A motor overload relay consist of a current sensing unit and a
mechanism activated by the sensing unit that --- correct answer ---
Open the motor circuit
If low-voltage and high-voltage cable must be placed in parallel
runs they should be separated by at least --- correct answer ---6
inches
, On magnetic contactors which contacts are said to be normally open
and (NO) --- correct answer ---Those that are apart when the relay
is de-energized
Lighting contactors --- correct answer ---rated for high inrush
current's
Low voltage remote control switching relays use --- correct answer
---split coil
Which of the following can provide motor overload protection but
have the disadvantage of being non-renewable --- correct answer --
-Dual element or time relay fuses
Which of the following is a probable cause of a really failing to drop
out --- correct answer ---Operating coil energized
The most likely application of a contactor is a --- correct answer ---
Reversing motor starter with External overload protection
The two classifications of overload relays are thermal And ---
correct answer ---Magnetic
Fundamental Concepts Questions and Answers Latest
Version 2025–2026 100% Verified
Introduction:
This verified 2025–2026 study resource for NCCER Electrical Level 2
Module 11 covers Control Systems and Fundamental Concepts with
complete questions and answers. It explains the principles of open-
loop and closed-loop control, PID controllers, sensors, actuators,
relays, control panels, and industrial automation components. The
document also includes key concepts such as feedback, system
stability, tuning, and control algorithms, making it ideal for students
and apprentices preparing for NCCER certification exams.
Exam Questions and Answers
Melting alloy in bimetallic overload relays are designed to ---
correct answer ---Approx. heat generated in motor
The contactor action is dependent on current flow the contactor is
described as --- correct answer ---Electrically held
The location of all lighting fixtures is shown on the --- correct
answer ---Floor plan
Remote control wiring shall be installed in accordance with ---
correct answer ---NEC article 725, class 2
,The operating coil is designed to operate the relay at what
percentage of rated voltage --- correct answer ---80% to 110%
Contacts that are together when the relay is deenergized are said to
be --- correct answer ---Normally closed
The low voltage panel enclosure should be installed --- correct
answer ---Eye level between two studs
In Opto-isolate solid state relay is activated by --- correct answer --
-Light
Emergency lighting circuits often use --- correct answer ---
Magnetic relays
A motor overload relay consist of a current sensing unit and a
mechanism activated by the sensing unit that --- correct answer ---
Open the motor circuit
If low-voltage and high-voltage cable must be placed in parallel
runs they should be separated by at least --- correct answer ---6
inches
, On magnetic contactors which contacts are said to be normally open
and (NO) --- correct answer ---Those that are apart when the relay
is de-energized
Lighting contactors --- correct answer ---rated for high inrush
current's
Low voltage remote control switching relays use --- correct answer
---split coil
Which of the following can provide motor overload protection but
have the disadvantage of being non-renewable --- correct answer --
-Dual element or time relay fuses
Which of the following is a probable cause of a really failing to drop
out --- correct answer ---Operating coil energized
The most likely application of a contactor is a --- correct answer ---
Reversing motor starter with External overload protection
The two classifications of overload relays are thermal And ---
correct answer ---Magnetic
