Deck 11: Motor Control Circuit Ladder Diagram Documentation

Question 1

The ____ is designated by a straight vertical stem with no arrow on it.

A)Selector Switch
B)Pushbutton
C)On Button
D)Motor Stator

Answer 1

B

Question 2

_______________ are designated with what is sometimes called a double-question mark design symbol, next to the symbol for a normally closed set of contacts.

Answer 2

Thermal overloads

Question 3

____ are documented to the right of the L2 rail, and describe the purpose, or intention of the rung.

A)Ladder diagrams
B)Motor control notes
C)Ladder rung notes
D)Motor control diagrams

Answer 3

C

Question 4

The ____ of the ladder diagram distribute control circuit power to each of the rungs drawn between them, and provide an orderly manner of documenting motor control circuits.

A)rungs
B)rails
C)edges
D)top

Question 5

____ are drawings that represent or stand for some material object to derive its meaning or purpose.

A)Symbols
B)Pictures
C)Diagrams
D)Drawings

Question 6

All _______________ are labeled the same as the control coil by which they are actuated.

Question 7

_______________ numbers can also help the troubleshooter follow the logical operation of the motor control circuit, without trying to trace control circuit wires through raceways and junction boxes.

Question 8

____ provide a delayed action changing operating states of the contacts associated with its control coil.

A)Indicator lamps
B)Timing relays
C)Ladder rungs
D)Thermal overload

Question 9

Any device that produces mechanical motion from the forces of the magnetic flux created by an electro-magnet is called a(n) _______________.

Question 10

Circuit input components are called ____ components.

A)output
B)circuit
C)load
D)control

Question 11

The control circuit operating voltage is determined by the voltage ____ of the motor starter contactor control coil.

A)reading
B)amps
C)amount
D)rating

Question 12

____ numbers or labels that the manufacturer has put on the component terminals facilitate connecting it in the circuit correctly.

A)Terminal
B)End
C)Relay
D)Contactor

Question 13

A continuous dotted line indicates a(n) _______________ linkage between the contacts that the dotted line goes between.

Question 14

It is not uncommon to find motor control circuit wiring to start with the number ____ label.

A)1
B)2
C)3
D)4

Question 15

The term _______________ determines how many different electrical circuits may be conducted through and controlled by the switch.

Question 16

____ coils are wired in the control circuit, and when energized create the magnetic flux to actuate the armature of a magnetic relay or contractor.

A)Contactor
B)Limit
C)Control
D)Pushbutton

Question 17

____ are used to provide a visual indication for an operator to verify that a certain operation is either energized or de-energized.

A)Indicator Lamps
B)Timing Relays
C)Ladder Rungs
D)Thermal Overloads

Question 18

Circuit output components are called ____ components.

A)output
B)circuit
C)load
D)control

Question 19

_______________ switches have the purpose of physically sensing the presence of different mediums.

Question 20

The ____is designated by the vertical stem, either straight or bent and capped with an arrow.

A)Selector Switch
B)Pushbutton
C)On Button
D)Motor Stator

Question 21

Describe at least two concepts that can be applied when numbering the wires on the ladder diagram of a motor control circuit?

Question 22

Switch and relay input contacts in the ladder diagram electrical control circuit are often configured to implement _______________ logic expressions that determine the logical operation of the control circuit.

Question 23

What is the purpose of reference documentation?