EMC Chapter 5

Question 1

No more than ___ loads should be placed in any circuit line between the power lines L1 and L2.

Answer 1

One

Question 2

Two loads must not be connected in ___ in one line of a line diagram.

Answer 2

series

Question 3

A ___ is the electrical device in a line diagram that uses the electrical power from L1 to L2.

Answer 3

load

Question 4

The load is ___ all the time if no control device is included in a line.

Answer 4

ON

Question 5

Each line in a line diagram should be numbered starting with the ___ line.

Answer 5

top

Question 6

A numerical cross-reference system consists of numbers in ___ to the right of the line diagram.

Answer 6

parentheses

Question 7

To differentiate between NO and NC contacts, NC contacts are indicated as a number that is ___.

Answer 7

underlined

Question 8

___ the wire reference numbers is a common method to help differentiate wire reference numbers from other numbering systems.

Answer 8

Circling

Question 9

The dashed line method works well when the control contacts are close together and the circuit is relatively ___.

Answer 9

Simple

Question 10

The numerical cross-reference method is used on ___ line diagrams.

Answer 10

complex

Question 11

All circuits are composed of ___ basic section(s).

Answer 11

three

Question 12

___ is not a signal condition.

Answer 12

Random

Question 13

The ___ accomplishes no work by itself; it merely starts or stops the flow of current in that part of the circuit.

Answer 13

signal

Question 14

The ___ of a circuit adds, subtracts, sorts, selects, and redirects the signals from the control devices to the load.

Answer 14

decision

Question 15

In most cases it is the operating coil in the circuit that is responsible for initiating the ___.

Answer 15

action

Question 16

___ diagrams are one of the oldest and most common methods of illustrating and understanding basic logic functions.

Answer 16

Line(ladder)

Question 17

___ logic is used in industry when two NO pushbuttons are connected in series to control a solenoid.

Answer 17

AND

Question 18

___ logic is used in industry when NO pushbutton and an NO temperature switch are connected in parallel.

Answer 18

OR

Question 19

___ logic has an output if the control signal is OFF.

Answer 19

NOT

Question 20

___ logic is an extension of NOT logic in which two or more NC contacts in series are used to control a load.

Answer 20

NOR

Question 21

___ logic is an extension of NOT logic in which two or more NC contacts are connected in parallel to control a load.

Answer 21

NAND

Question 22

___ circuits are also known as holding or sealing circuits.

Answer 22

Memory

Question 23

An example of a(n)___ process is a standard light switch that has only two positions: fully ON or fully OFF.

Answer 23

digital

Question 24

The ___ gate is a universal building block of digital logic.

Answer 24

NAND

Question 25

An integrated circuit’s notch indicated the ___ of the chip.

Answer 25

top

Question 26

Additional stop pushbuttons are connected in series using ___ logic with the existing stop pushbuttons.

Answer 26

NOR

Question 27

Additional start pushbuttons are connected in parallel using ___ logic with the existing start pushbuttons.

Answer 27

OR

Question 28

___ signal an operator that any one of a sequence of events may be taking place.

Answer 28

Pilot lights

Question 29

___ logic is used in a circuit when a pilot light is used to show that an operation has stopped.

Answer 29

NOT

Question 30

___ is the frequent starting and stopping of a motor for short periods of time.

Answer 30

Jogging

Question 31

___ is the systematic elimination of various parts of a system, circuit, or process to locate a malfunctioning part.

Answer 31

Troubleshooting

Question 32

A(n)___ circuit is an electrical circuit that has an incomplete path that prevents current flow.

Answer 32

open

Question 33

A switch in the OFF position is a(n)___ circuit.

Answer 33

open

Question 34

A(n)___ circuit is a circuit in which current takes a shortcut around the normal path of current flow.

Answer 34

short

Question 35

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.

Answer 35

dead