Electric Motor Control - Exam Questions & Verified Answers
Equipment Grounding connecting all metal parts of an electrical system that do not normally carry current
to earth ground
Examples of parts that you might ground. 1. metal conduit
2. raceways
3. enclosures
4. transformer cases
Fatal current can be as low as ___ __. 100 mA
You need to know ___ _________ ___ _____ that apply to all standards and codes
your application before you do any electrical work.
NEC national electric code
The ___ is the accepted guide in the US for safely NEC
installing and maintaining electrical systems and
equipment.
NEMA National Electrical Manufacturers Association
____ publishes standards for a wide range of motor control NEMA
equipment.
NEMA standards are ___ commonly observed outside the not
US.
IEC International Electrotechnical Commission
The ___ is the accepted standard in most other countries. IEC
UL Underwriters Laboratories
OSHA Occupational Safety and Health Administration
Observing electrical safety rules will help you _____ a avoid
situation that could result in a shock.
Electrical Safety: ______ all metal jewelry. remove
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, Electric Motor Control - Exam Questions & Verified Answers
Electrical Safety: Be aware of condition ______ working on before
a piece of equipment.
Electrical Safety: Do not rely on ______ _______ to safety devices
protect you.
Electrical Safety: Never remove the _________ _____ on grounding plug
an AC plug.
Electrical Safety: Always keep your tools and test organized
equipment _________.
Electrical Safety: Do not work on ___ floors. wet
Electrical Safety: Work with ___ hand. one
Electrical Safety: ______ move slowly and deliberately. always
Electrical Safety: Do not work _____. alone
Electrical Safety: Avoid ____________. distractions
OSHA requires the locking out of all _____ _______ that power sources
can be locked out to prevent the possible dangers during
servicing or maintenance.
Lockout process of blocking the energy flow from a power source to a piece of equipment
and assuring that it remains
3 examples of lockout devices lock, block, or chain
______ involves placing a tag on the power source that tagout
warns others not to restore power.
What must tags must clearly state? do not operate
The only person who should remove a lockout / tagout is? the person who installed it
Stuvia 2026-2027 | Latest Version
, Electric Motor Control - Exam Questions & Verified Answers
Equipment grounding involves connecting to earth ground metal
all _____ parts of an electrical system that do not carry
current under normal conditions.
A current as small as ___ __ can be fatal. 100 mA
NEC stands for _____ _____ _____. national electrical code
You cannot count on devices such as fuses, relays and protect
interlocks to _______ you from shock.
Standing on a wet floor _________ the resistance between decreases
you and ground, increasing the possibility of severe shock.
_______ is the process of blocking the energy flow from a lockout
power source to a piece of equipment and assuring it
remains blocked.
Three Phase Power electrical power transmitted in three separate phases
An __________ that had three main windings operating alternator
120 degrees apart creates the three phases. out of phase
Therefore, the electrical energy produced as the rotor
rotates is also in three phases that are 120 degrees ___
__ _____ with each other.
_____ _____ _____ is very versatile because a variety of three phase power
single phase and three phase voltages are available with
distribution and control transformers.
Power companies transmit three phase power at a ____ very high voltage
____ _______ to minimize power losses.
Two basic three phase systems for power distribution are? Wye and Delta
___ configured distribution system has one end of each Wye
windings connected together.
208 VAC is a common voltage between any two of the wye-configured system
phases on a ________________ ______.
the 208 vac on a wye system is known as? phase to phase or high voltage
Other common phase to phase voltages that can be distribution
supplied from this type of ___________ system include
480 VAC or 600 VAC.
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, Electric Motor Control - Exam Questions & Verified Answers
Typical ________________ distribution system has each delta configured
phase connected end to end to form a loop.
Neutral conductor that provides a common return path to the source for the conductors that
carry current in a system
Where is a 4-wire wye distribution system neutral common point where the three phase windings meet
conductor connected to?
On a 4 wire wye configuration single phase voltages are phases, neutral
available between any of the ______ and the _______.
In many cases in a 4 wire wye configuration the neutral ground
conductor is connected to ______ ( as required by the
NEC )
Grounded wye configurations are _____ than delta safer
configurations
Grounded neutral wire should ___ be used as an not
equipment ground.
Center tapping and grounding one of the coils on a delta voltage
configured systems allows several _______ options.
Bastard Voltage unreliable voltage source that runs from phase b to neutral on a grounded delta
system that has 190 vac approximately.
Bastard voltage can be used to drive a _________ system. lighting
3 Phase Grounded System includes a grounded neutral conductor and the 3 phase feeds
3 Phase Ungrounded System includes only the 3 phase feeds
Ground Fault An unintentional, electrically conductive connection between an ungrounded
conductor of an electrical circuit and the normally non-current-carrying conductors,
metallic enclosures, metallic raceways, metallic equipment, or earth.
A ground fault occurs in 3 phase when one of the ______ phases
becomes grounded
How does an alternator produce 3 phase power? it produces 3 phase power due to its 3 sets of windings being separated by 120
degrees
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Equipment Grounding connecting all metal parts of an electrical system that do not normally carry current
to earth ground
Examples of parts that you might ground. 1. metal conduit
2. raceways
3. enclosures
4. transformer cases
Fatal current can be as low as ___ __. 100 mA
You need to know ___ _________ ___ _____ that apply to all standards and codes
your application before you do any electrical work.
NEC national electric code
The ___ is the accepted guide in the US for safely NEC
installing and maintaining electrical systems and
equipment.
NEMA National Electrical Manufacturers Association
____ publishes standards for a wide range of motor control NEMA
equipment.
NEMA standards are ___ commonly observed outside the not
US.
IEC International Electrotechnical Commission
The ___ is the accepted standard in most other countries. IEC
UL Underwriters Laboratories
OSHA Occupational Safety and Health Administration
Observing electrical safety rules will help you _____ a avoid
situation that could result in a shock.
Electrical Safety: ______ all metal jewelry. remove
Stuvia 2026-2027 | Latest Version
, Electric Motor Control - Exam Questions & Verified Answers
Electrical Safety: Be aware of condition ______ working on before
a piece of equipment.
Electrical Safety: Do not rely on ______ _______ to safety devices
protect you.
Electrical Safety: Never remove the _________ _____ on grounding plug
an AC plug.
Electrical Safety: Always keep your tools and test organized
equipment _________.
Electrical Safety: Do not work on ___ floors. wet
Electrical Safety: Work with ___ hand. one
Electrical Safety: ______ move slowly and deliberately. always
Electrical Safety: Do not work _____. alone
Electrical Safety: Avoid ____________. distractions
OSHA requires the locking out of all _____ _______ that power sources
can be locked out to prevent the possible dangers during
servicing or maintenance.
Lockout process of blocking the energy flow from a power source to a piece of equipment
and assuring that it remains
3 examples of lockout devices lock, block, or chain
______ involves placing a tag on the power source that tagout
warns others not to restore power.
What must tags must clearly state? do not operate
The only person who should remove a lockout / tagout is? the person who installed it
Stuvia 2026-2027 | Latest Version
, Electric Motor Control - Exam Questions & Verified Answers
Equipment grounding involves connecting to earth ground metal
all _____ parts of an electrical system that do not carry
current under normal conditions.
A current as small as ___ __ can be fatal. 100 mA
NEC stands for _____ _____ _____. national electrical code
You cannot count on devices such as fuses, relays and protect
interlocks to _______ you from shock.
Standing on a wet floor _________ the resistance between decreases
you and ground, increasing the possibility of severe shock.
_______ is the process of blocking the energy flow from a lockout
power source to a piece of equipment and assuring it
remains blocked.
Three Phase Power electrical power transmitted in three separate phases
An __________ that had three main windings operating alternator
120 degrees apart creates the three phases. out of phase
Therefore, the electrical energy produced as the rotor
rotates is also in three phases that are 120 degrees ___
__ _____ with each other.
_____ _____ _____ is very versatile because a variety of three phase power
single phase and three phase voltages are available with
distribution and control transformers.
Power companies transmit three phase power at a ____ very high voltage
____ _______ to minimize power losses.
Two basic three phase systems for power distribution are? Wye and Delta
___ configured distribution system has one end of each Wye
windings connected together.
208 VAC is a common voltage between any two of the wye-configured system
phases on a ________________ ______.
the 208 vac on a wye system is known as? phase to phase or high voltage
Other common phase to phase voltages that can be distribution
supplied from this type of ___________ system include
480 VAC or 600 VAC.
Stuvia 2026-2027 | Latest Version
, Electric Motor Control - Exam Questions & Verified Answers
Typical ________________ distribution system has each delta configured
phase connected end to end to form a loop.
Neutral conductor that provides a common return path to the source for the conductors that
carry current in a system
Where is a 4-wire wye distribution system neutral common point where the three phase windings meet
conductor connected to?
On a 4 wire wye configuration single phase voltages are phases, neutral
available between any of the ______ and the _______.
In many cases in a 4 wire wye configuration the neutral ground
conductor is connected to ______ ( as required by the
NEC )
Grounded wye configurations are _____ than delta safer
configurations
Grounded neutral wire should ___ be used as an not
equipment ground.
Center tapping and grounding one of the coils on a delta voltage
configured systems allows several _______ options.
Bastard Voltage unreliable voltage source that runs from phase b to neutral on a grounded delta
system that has 190 vac approximately.
Bastard voltage can be used to drive a _________ system. lighting
3 Phase Grounded System includes a grounded neutral conductor and the 3 phase feeds
3 Phase Ungrounded System includes only the 3 phase feeds
Ground Fault An unintentional, electrically conductive connection between an ungrounded
conductor of an electrical circuit and the normally non-current-carrying conductors,
metallic enclosures, metallic raceways, metallic equipment, or earth.
A ground fault occurs in 3 phase when one of the ______ phases
becomes grounded
How does an alternator produce 3 phase power? it produces 3 phase power due to its 3 sets of windings being separated by 120
degrees
Stuvia 2026-2027 | Latest Version
