EMC Chapter 5 Flashcards
No more than ___ loads should be placed in any circuit line between the power lines L1 and L2.
One
Two loads must not be connected in ___ in one line of a line diagram.
series
A ___ is the electrical device in a line diagram that uses the electrical power from L1 to L2.
load
The load is ___ all the time if no control device is included in a line.
ON
Each line in a line diagram should be numbered starting with the ___ line.
top
A numerical cross-reference system consists of numbers in ___ to the right of the line diagram.
parentheses
To differentiate between NO and NC contacts, NC contacts are indicated as a number that is ___.
underlined
___ the wire reference numbers is a common method to help differentiate wire reference numbers from other numbering systems.
Circling
The dashed line method works well when the control contacts are close together and the circuit is relatively ___.
Simple
The numerical cross-reference method is used on ___ line diagrams.
complex
All circuits are composed of ___ basic section(s).
three
___ is not a signal condition.
Random
The ___ accomplishes no work by itself; it merely starts or stops the flow of current in that part of the circuit.
signal
The ___ of a circuit adds, subtracts, sorts, selects, and redirects the signals from the control devices to the load.
decision
In most cases it is the operating coil in the circuit that is responsible for initiating the ___.
action
___ diagrams are one of the oldest and most common methods of illustrating and understanding basic logic functions.
Line(ladder)
___ logic is used in industry when two NO pushbuttons are connected in series to control a solenoid.
AND
___ logic is used in industry when NO pushbutton and an NO temperature switch are connected in parallel.
OR
___ logic has an output if the control signal is OFF.
NOT
___ logic is an extension of NOT logic in which two or more NC contacts in series are used to control a load.
NOR
___ logic is an extension of NOT logic in which two or more NC contacts are connected in parallel to control a load.
NAND
___ circuits are also known as holding or sealing circuits.
Memory
An example of a(n)___ process is a standard light switch that has only two positions: fully ON or fully OFF.
digital
The ___ gate is a universal building block of digital logic.
NAND
An integrated circuit’s notch indicated the ___ of the chip.
top
Additional stop pushbuttons are connected in series using ___ logic with the existing stop pushbuttons.
NOR
Additional start pushbuttons are connected in parallel using ___ logic with the existing start pushbuttons.
OR
___ signal an operator that any one of a sequence of events may be taking place.
Pilot lights
___ logic is used in a circuit when a pilot light is used to show that an operation has stopped.
NOT
___ is the frequent starting and stopping of a motor for short periods of time.
Jogging
___ is the systematic elimination of various parts of a system, circuit, or process to locate a malfunctioning part.
Troubleshooting
A(n)___ circuit is an electrical circuit that has an incomplete path that prevents current flow.
open
A switch in the OFF position is a(n)___ circuit.
open
A(n)___ circuit is a circuit in which current takes a shortcut around the normal path of current flow.
short
A(n)___ short is a short circuit that opens the circuit as soon as the circuit is energized or when the section of the circuit containing the short is energized.
dead
