ILT 115 Chapter 8 Test Questions and Answers 2024 with Complete Solutions
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Course
ILT 115
Institution
ILT 115
ILT 115 Chapter 8 Test Questions and Answers 2024 with Complete Solutions
The reversal of a DC motor is accomplished by - Answer- Reversing the direction of the armature current only OR reversing the direction of the field current only
When utilizing jogging control - Answer- The maintaining...
ILT 115 Chapter 8 Test Questions
and Answers 2024 with Complete
Solutions
The reversal of a DC motor is accomplished by - Answer- Reversing the direction of the
armature current only OR reversing the direction of the field current only
When utilizing jogging control - Answer- The maintaining contact must not be connected
Braking system that applies to stopping a motor by reversing it while it is still running in
the forward direction - Answer- Plugging
Braking system that can hold a motor stationary once it has stopped - Answer- Friction
brake
DC injection braking is a method of braking in which - Answer- DC is applied to the
stator windings if an AC motor
The speed of an induction motor depends on the - Answer- Number of poles built into
the motor AND frequency of the power supplied to it
The speed of wound rotor induction motor is varied by - Answer- Connections variable
resistance into the rotor circuit
Article ______________ of the national electrical code covers installation of motor
circuits - Answer- 430
In the majority of applications motor overcurrent protection is provided by an overcurrent
____________ in the motor controller - Answer- Relay
A motor _______________ is used to start and stop an electric motor by closing and
opening the main power current to the motor - Answer- Controller
The purpose of a motor __________ means is to open the supply conductors to the
motor, allowing personal to work safely on the installation - Answer- Disconnect
The disconnecting means for the motor controller and the motor must open all
_____________________ supply conductors simultaneously - Answer- Ungrounded
conductors
, In general, each motor requires a disconnecting means that is located within sight of the
motor. In sign from us defined as being visible and not more than ____________ feed in
distance from one another - Answer- 50
Motor control circuits can be the same voltage as the motor up to 600 volts, or can be
reduced by means of a control ________________ - Answer- Transformer
Where one side of the motor control circuit is grounded, the design of the control circuit
must prevent the motor from being started due to a _______________ fault in the
control circuit wiring - Answer- Ground
Wyd-delta starting involves connecting the motor winds in a ___________ configuration
during the starting period and then in ____________ after the motor has begun to
accelerate - Answer- WYE; delta
Part winding reduced voltage starters are used on three phase motors wound for
___________ voltage operation - Answer- Dual
A reversing starter requires _______ set of overload relays - Answer- One
With pushbutton interlocking the normally closed contact on the reverse push button
acts like another _____________ pushbutton in the forward circuit - Answer- Stop
The reversing starter for a single phase capacitor start motor changes the direction of
rotation by interchanging the ___________ winding leads, while those of the run
winding remain the same - Answer- Start
Due to the operation of the _________________ switch, the single phase capacitor
start motor must be allowed to slow down before attempting to reverse the direction of
rotation - Answer- Centrifugal
The most common method of stopping a motor is to remove the ____________ voltage
and allow the motor to coast to a stop - Answer- Supply
A _______________ started Is required when a motor is to be brought to a stop by
means of plugging - Answer- Reversing
A zero speed or plugging switch prevent the motor from ______________ after it has
come to a stop - Answer- Reversing
The full load current rating shown on the motor's nameplate is permitted to be used to
determine the ampacity of the conductors. - Answer- False
The full load current rating shown on the motor's nameplate is permitted to be used to
determine the overload protection for the motor - Answer- True
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