Motor Controls 1 Final Exam with
Correct Answers
Metallic - correct answer-Equipment grounding involves connecting to earth ground all
_____ parts of an electrical system that do not carry current under normal conditions.
100 mA - correct answer-A current as small as _____ can be fatal.
NEC - correct answer-_____ stands for National Electrical Code
Decreases - correct answer-Standing on a wet floor _____ the resistance between you
and ground, increasing the possibility of severe shock.
Lockout - correct answer-_____ is the process of blocking the energy flow from a power
source to a piece of equipment and assuring it remains blocked.
120 - correct answer-An alternator has three main windings that are placed _____
degrees apart.
Wye - correct answer-A(n) _____ configured distribution system has one end of each
phase winding connected together.
Delta - correct answer-A(n) _____ configured distribution system has each phase
winding connected end-to-end to form a loop.
Neutral - correct answer-A(n) _____ is a conductor that provides a return path to the
source for the current carrying conductors in the system.
Ground Fault - correct answer-When one phase of a system becomes grounded, it is
called a (n)______.
Fusible Disconnect - correct answer-The two most common devices used to disconnect
power to a circuit are a(n) _____ and a circuit breaker.
Time-Delay - correct answer-A(n) _____ fuse has two elements, an instantaneous
element and an overload element.
Full-Load - correct answer-_____ current is the current that is drawn by a motor when it
is operating at its rated operating speed.
, Ampacity - correct answer-_____ is the maximum current carrying capacity of a
conductor.
125 - correct answer-Typically, the overcurrent protection for a motor should be
selected for _____ % of the full-load current of the motor.
120 - correct answer-The three phases of a three-phase motor are _____ degrees
apart.
Stator - correct answer-The _____ of a three-phase motor is made up of three separate
sets of windings.
56 - correct answer-One of the most common NEMA frame sizes for small motors is
_____.
Ambient Temperature - correct answer-_____ is the temperature of the air surrounding
an operating motor.
Service Factor - correct answer-The _____ represents the margin of safety for operating
a motor above its rated output power.
Voltage - correct answer-A dual _____ motor should be operated on the higher voltage
rating so the motor draws less current.
CNC Mill - correct answer-A common example of jogging control of an electric motor is
the positioning of a table on a(n) _____.
Simultaneously - correct answer-A disconnect must open all ungrounded conductors
_____.
Motor - correct answer-Overload protection is designed to protect the _____ by
disconnecting it from the power source when an overload is sensed.
Controller - correct answer-A motor _____ does not include overload protection.
Starter - correct answer-A motor _____ is a motor controller that includes overload
protection.
Manual - correct answer-The contacts of a(n) _____ motor starter are opened and
closed when acted upon by an operator.
Magnetic - correct answer-The contacts of a(n) _____ motor started are opened and
closed when acted upon by a coil.
Single-Phase - correct answer-Fractional horsepower starters are used only for _____
motors rated for less than 1hp/0.75kW.
Correct Answers
Metallic - correct answer-Equipment grounding involves connecting to earth ground all
_____ parts of an electrical system that do not carry current under normal conditions.
100 mA - correct answer-A current as small as _____ can be fatal.
NEC - correct answer-_____ stands for National Electrical Code
Decreases - correct answer-Standing on a wet floor _____ the resistance between you
and ground, increasing the possibility of severe shock.
Lockout - correct answer-_____ is the process of blocking the energy flow from a power
source to a piece of equipment and assuring it remains blocked.
120 - correct answer-An alternator has three main windings that are placed _____
degrees apart.
Wye - correct answer-A(n) _____ configured distribution system has one end of each
phase winding connected together.
Delta - correct answer-A(n) _____ configured distribution system has each phase
winding connected end-to-end to form a loop.
Neutral - correct answer-A(n) _____ is a conductor that provides a return path to the
source for the current carrying conductors in the system.
Ground Fault - correct answer-When one phase of a system becomes grounded, it is
called a (n)______.
Fusible Disconnect - correct answer-The two most common devices used to disconnect
power to a circuit are a(n) _____ and a circuit breaker.
Time-Delay - correct answer-A(n) _____ fuse has two elements, an instantaneous
element and an overload element.
Full-Load - correct answer-_____ current is the current that is drawn by a motor when it
is operating at its rated operating speed.
, Ampacity - correct answer-_____ is the maximum current carrying capacity of a
conductor.
125 - correct answer-Typically, the overcurrent protection for a motor should be
selected for _____ % of the full-load current of the motor.
120 - correct answer-The three phases of a three-phase motor are _____ degrees
apart.
Stator - correct answer-The _____ of a three-phase motor is made up of three separate
sets of windings.
56 - correct answer-One of the most common NEMA frame sizes for small motors is
_____.
Ambient Temperature - correct answer-_____ is the temperature of the air surrounding
an operating motor.
Service Factor - correct answer-The _____ represents the margin of safety for operating
a motor above its rated output power.
Voltage - correct answer-A dual _____ motor should be operated on the higher voltage
rating so the motor draws less current.
CNC Mill - correct answer-A common example of jogging control of an electric motor is
the positioning of a table on a(n) _____.
Simultaneously - correct answer-A disconnect must open all ungrounded conductors
_____.
Motor - correct answer-Overload protection is designed to protect the _____ by
disconnecting it from the power source when an overload is sensed.
Controller - correct answer-A motor _____ does not include overload protection.
Starter - correct answer-A motor _____ is a motor controller that includes overload
protection.
Manual - correct answer-The contacts of a(n) _____ motor starter are opened and
closed when acted upon by an operator.
Magnetic - correct answer-The contacts of a(n) _____ motor started are opened and
closed when acted upon by a coil.
Single-Phase - correct answer-Fractional horsepower starters are used only for _____
motors rated for less than 1hp/0.75kW.
