Introduction to Motor Control and the Industry Flashcards
Which component standard rates motor controllers in HP?
A) IEC
B) NEMA
B) NEMA
What UL Standard is the standard for Industrial Control Panels
A) UL 506
B) UL 506A
C) UL 508
D) UL 508A
D) UL 508A
Which item, included in a NEMA Standard, would indicate procedures to determine if a motor control component was in compliance with manufacturing ratings?
A) Application
B) Dimensions
C) Scope
D) Testing
D) Testing
Which organization was instrumental in the development of the SI standard?
A) IEC
B) NEMA
A) IEC
Using the Left-Hand Rule for generators, the center finger indicates the direction of the ___?
A) current induced into the armature
B) direction of the conductor
C) motion of the conductor
D) north pole
A) current induced into the armature
A voltage would be induced if there was a motion of electrons in a conductor caused by an interaction between the ___ and ___.
A) magnetic field of the circuit / magnetic force between the poles
B) magnetic field of the electrons / magnetic line of force
C) magnetic field of the circuit / flux lines of the magnet
D) magnetic field of the magnet / magnetic field of the electrons
C) magnetic field of the circuit / flux lines of the magnet
Voltage can be increased in a DC generator by increasing the ___.
A) AWG size of the conductor cutting the magnetic field
B) resistance of the magnetic field
C) speed of the relative motion between the conductor and the magnetic field
D) time it takes for the armature to complete a full rotation
C) speed of the relative motion between the conductor and the magnetic field
What items are normally found in a NEMA Standard?
I. Marking
II. Rating
III. Terms
IV. Warranty
A) I. and II.
B) I., II., III., and IV
C) II. and III.
D) II., III., and IV.
A) I. and II.
Devices built according to the ___ standard have a smaller footprint.
A) IEC
B) NEMA
A) IEC
In order to have voltage induced, there must be ___ between the conductor and the magnetic field.
A) electromagnetic induction
B) relative motion
C) reluctance
D) resistance
B) relative motion
Which of the following organizations are identified in the text as standards-setting organizations for motor control devices?
I. International Brotherhood of Electrical Workers (IBEW)
II. International Electrotechnical Commission (IEC)
III. National Electrical Manufacturers Association (NEMA)
IV. National Fire Protection Association (NFPA)
A) I. and II.
B) I., II., III., and IV.
C) I. and III.
D) II. and III.
E) II., III., and IV.
D) II. and III.
Which standard’s devices are considered application specific?
A) IEC
B) NEMA
A) IEC
If the direction of the current flow changes, what else will change?
A) The amount of resistance in the circuit
B) The amount of voltage at the source
C) The direction of the conductor passing through the flux lines
D) The magnetic field of the electrons
C) The direction of the conductor passing through the flux lines
Inducing a voltage into a conductor by passing it through a magnetic field is called ___.
A) electromagnetic induction
B) electrostatic induction
C) relative motion
D) reluctance
A) electromagnetic induction
NEMA AC motors are designed for ___ power.
A) 50 Hz
B) 60 Hz
B) 60 Hz
Which standards organization is associated with the International Organization for Standardization (ISO)?
A) IEC
B) NEMA
A) IEC
As a standards organization, which of the following document formats are used with IEC standards?
I. ES - European Consensus
II. IS - International Standards
III. TR - Technical Reports
IV. UR - Universal Reports
A) I. and II.
B) I., II., III., and IV.
C) II. and III.
D) II., III., and IV.
C) II. and III.
Using the Left-Hand Rule for generators, the ___ indicates the direction of the current induced into the armature.
A) index finger
B) middle/center finger
C) pinky
D) thumb
B) middle/center finger
When using the UL 508A Panel Shop Color Code for industrial control panels, it is best to use ___ when wiring DC at control voltage.
A) black
B) blue
C) green
D) red
B) blue
What rule is used to show motion, the direction of the magnetic field, and the direction of current flow for electromagnetic induction in DC theory?
A) The Left-Hand Rule for conductors
B) The Left-Hand Rule for generators
C) The Right-Hand Rule for conductors
D) The Right-Hand Rule for generators
B) The Left-Hand Rule for generators
Sources of energy that drive machines are identified as ___ movers.
A) mechanical
B) prime
C) principle
D) renewable
B) prime
If the number of loops in the wire that cuts a magnetic field ___, then the magnitude of voltage produced by electromagnetic induction will increase.
A) decreases
B) increases
C) remains constant
B) increases
Which of the following electrical industry pioneers invented the first practical AC motor?
A) George Westinghouse
B) Nikola Tesla
C) Thomas Edison
D) Zenobe Gramme
B) Nikola Tesla
A motor ___ is a device that governs the performance of an electric motor in a predefined manner.
A) controller
B) frequency
C) rotor
D) stator
A) controller
When using the UL 508A Panel Shop Color Code for industrial control panels, it is best to use ___ when wiring AC at line voltage.
A) black
B) blue
C) green
D) red
A) black
Which standard’s devices are designed for fast-acting, current-limiting fuses?
A) IEC
B) NEMA
A) IEC
