What is the purpose of grounding equipment? - answer--To prevent connecting
metal parts that aren't meant to carry current from being charged.
When a metal part is not grounded, what could the operator risk. - answer--The
operator could risk shock, or the voltage in the metal object discharging through
them.
What is the purpose of the National Electrical Code? - answer--The National
Electrical Code creates electrical system codes and laws to protect systems and
operators.
What is the purpose of the National Electrical Manufacturer's Association? -
answer--To create laws and codes on how to manage an electrical motor.
True or False: It is encouraged to work with one hand while working with an
electrical system. - answer--True! Working with one hand reduces the risk of
electrical shock and allows an operator to disengage quickly.
Define Lockout/Tagout. - answer--A lockout/tagout is an item used to prevent the
powering or energizing a system while a person works on it.
3-phase motors have alternators placed every: - answer--120 degrees.
Define Wye-Configuration. - answer--The windings of a motor is connected by a
single winding: in the middle. This leads to the Y-shaped windings.
Define Delta-Configuration. - answer--The windings of a motors is connected end-
to-end, leadinging to a triangle-shaped windings.
Define a disconnect. - answer--A disconnect is manual input that shuts off a
system to prevent discharge or shorts.
True or False: a fusible disconnect is not a safe protective device. - answer--False!
A fusible disconnect is a very safe protective device, as it opens the circuit during
a short.
What is a circuit breaker? - answer--A circuit breaker is a resetable system that
can automatically open a circuit manually, magnetically, or thermally.
True or False: A fuse is cheaper and simpler than a circuit breaker. - answer--True!
A fuse is easy to plug in and cheap, but needs to be replaced after opened.
What is the rated full-load current? - answer--The rated full-load current is the
current level a motor is able to steadily run at.
The overcurrent fuse must be what percentage of the full-load current? - answer--
The overcurrent fuse must be 125% of the full-load current.
(Ex. 25A * 125% = 31.25A)
What is conductor ampacity? - answer--Conductor ampacity is the maximum
current a conductor can carry.
What is a motor's Service Factor? - answer--The service factor is the output
voltage of a motor.
List the 5 types of motor control functions. - answer--Start/stop systems, motor &
control protection, speed control, jogging, and reversing.
What is overload protection? - answer--Overload protection prevents a circuit from
overloading, usually by opening the circuit when an overload could occur.
What is the difference between a manual and magnetic motor starter? - answer--A
manual starter recieves a direct input from an operator, while a magnetic motor
starter recieves a remote input.
Why do most facilities use a magnetic motor starter over a manual one? -
answer--A magnetic motor starter protects the operator from discharges or
intentional operation by allowing remote control.
What are the three different classifications of electrical control systems? -
answer--Manual control, automatic control, and semi-automatic control.
What is a manual electrical control system? - answer--A manual electrical control
system is a system that is manually controlled by an operator.
What is the sequence of operation? - answer--The act of a machine moving to
complete actions in a specified order.
What is logic in electrical engineering? - answer--Logic is an action an electical
system makes based on an input.
What are the six logic elements of a logical control ciruit? - answer--AND, OR,
NOT, NAND, NOR, and memory.
