Question 1

Digital logic gates are generally housed in ____-pin IC packages.

Accepted Answer

A)  12 
B)  14 
C)  16 
D)  18 
A)  12 
B)  14 
C)  16 
D)  18 B

Question 2

What happens when a normal snap-action switch is used with an electronic control system?

Accepted Answer

When this type of switch is used with an electronic control system, contact bounce can cause a great deal of trouble. Most digital logic circuits are very fast-acting and can count each pulse when a contact bounces. Depending on the specific circuit, each of these pulses may be interpreted as a command. Contact bounce can cause the control circuit to "lose its mind."

Question 3

What is a snap action?

Accepted Answer

Almost all sensing devices employ a snap-action switch. When a mechanical switch is used, the snap action is generally obtained by spring loading the contacts. This snap action is necessary to ensure good contact when the switch operates. Assume that a float switch is used to sense when water reaches a certain level in a tank. If the water rises at a slow rate, the contacts will come together at a slow rate, resulting in a poor connection. However, if the contacts are spring loaded, when the water reaches a certain level, the contacts will snap from one position to another.

Question 4

Integrated circuits can be tested with a volt-ohm-milliammeter.

Accepted Answer

A) True 
 B)False

Question 5

The simplest of all the gates is the ____________________.

Accepted Answer

inverter

Question 6

There are five basic types of gates: the AND, OR, NOR, NAND, and ____.

Accepted Answer

A)  NORAND 
B)  FORWARD 
C)  INVERTER 
D)  XOR 
A)  NORAND 
B)  FORWARD 
C)  INVERTER 
D)  XOR

Question 7

Gate circuits are multi-input, ____________________-output devices.

Accepted Answer

The answer of Gate circuits are multi-input, ____________________-output devices....

Question 8

When a control circuit is constructed, it must have sensing devices to tell it what to do.

Accepted Answer

A) True 
 B)False

Question 9

What gate is often referred to as the basic gate? Why is it referred to as the basic gate?

Accepted Answer

The NAND gate is often referred to as th

Question 10

What is an easy way to remember how an OR gate functions?

Accepted Answer

An easy way to remem

Question 11

Several circuits can be used to construct a bounceless switch, but the most common construction method uses ____________________ gates.

Accepted Answer

The answer of Several circuits can be used to construct...

Question 12

Although most contacts have a snap action, they do not generally close with a ____ action.

Accepted Answer

A)  snap 
B)  digital 
C)  bounceless 
D)  single 
A)  snap 
B)  digital 
C)  bounceless 
D)  single

Question 13

Almost all sensing devices employ a(n) ____________________ switch.

Accepted Answer

The answer of Almost all sensing devices employ a(n) ____________________...

Question 14

Digital means a device that has only three states.

Accepted Answer

A) True 
 B)False

Digital logic gates are generally housed in ____-pin IC packages.

What happens when a normal snap-action switch is used with an electronic control system?

What is a snap action?

Integrated circuits can be tested with a volt-ohm-milliammeter.

The simplest of all the gates is the ____________________.

There are five basic types of gates: the AND, OR, NOR, NAND, and ____.

Gate circuits are multi-input, ____________________-output devices.

When a control circuit is constructed, it must have sensing devices to tell it what to do.

What gate is often referred to as the basic gate? Why is it referred to as the basic gate?

What is an easy way to remember how an OR gate functions?

Several circuits can be used to construct a bounceless switch, but the most common construction method uses ____________________ gates.

Although most contacts have a snap action, they do not generally close with a ____ action.

Almost all sensing devices employ a(n) ____________________ switch.

Digital means a device that has only three states.

General Principles of Motor Control, Symbols and Schematic Diagrams

Manual Starters and Overload Relays

The Control Transformer, Relays, Contactors, and Motor Starters

Timing Relays, Pressure Switches and Sensors

Float Switches, Flow Switches and Sensors

Limit Switches and Phase Failure Relays

Temperature Sensing, Devices M Solenoid and Motor Operated Valves

Hall Effect Sensors and Proximity Detectors

Basic Control Circuits and Photodetectors

Schematics, Wiring Diagrams Circuit (1), Timed Starting for Three Motors Circuit (2)

Float Switch Control of a Pump and Pilot Lights Circuit (3), Developing a Wiring Diagram Circuit (1)

Developing a Wiring Diagram Circuit (2) and Developing a Wiring Diagram Circuit (3)

Installing Control Systems and Reading Large Schematic Diagrams

Multiple Push Button Stations and Hand-Off-Automatic Controls

Forward-Reverse Control, Jogging and Inching

Dc Motors and Sequence Control

Solid-State Dc Drives and Starting Methods for DC Motors

Stepping Motors, the Motor and Starting Methods

Autotransformer Starting , Resistor and Reactor Starting for Ac Motors

Wye-Delta Starting, Part Winding Starters

Braking , Consequent Pole Motors, Variable Voltage and Magnetic Clutches

Variable Frequency Control

Troubleshooting, Motor Installation and Developing Control Circuits

Programmable Logic Controllers and Start-Stop Push Button Control

Programming a PLC and Analog Sensing for Programmable Controllers

Filters

Exam 51: Digital Logic and the Bounceless Switch

Digital logic gates are generally housed in ____-pin IC packages.

What happens when a normal snap-action switch is used with an electronic control system?

What is a snap action?

Integrated circuits can be tested with a volt-ohm-milliammeter.

The simplest of all the gates is the ____________________.

There are five basic types of gates: the AND, OR, NOR, NAND, and ____.

Gate circuits are multi-input, ____________________-output devices.

When a control circuit is constructed, it must have sensing devices to tell it what to do.

What gate is often referred to as the basic gate? Why is it referred to as the basic gate?

What is an easy way to remember how an OR gate functions?

Several circuits can be used to construct a bounceless switch, but the most common construction method uses ____________________ gates.

Although most contacts have a snap action, they do not generally close with a ____ action.

Almost all sensing devices employ a(n) ____________________ switch.

Digital means a device that has only three states.

General Principles of Motor Control, Symbols and Schematic Diagrams

Manual Starters and Overload Relays

The Control Transformer, Relays, Contactors, and Motor Starters

Timing Relays, Pressure Switches and Sensors

Float Switches, Flow Switches and Sensors

Limit Switches and Phase Failure Relays

Temperature Sensing, Devices M Solenoid and Motor Operated Valves

Hall Effect Sensors and Proximity Detectors

Basic Control Circuits and Photodetectors

Schematics, Wiring Diagrams Circuit (1), Timed Starting for Three Motors Circuit (2)

Float Switch Control of a Pump and Pilot Lights Circuit (3), Developing a Wiring Diagram Circuit (1)

Developing a Wiring Diagram Circuit (2) and Developing a Wiring Diagram Circuit (3)

Installing Control Systems and Reading Large Schematic Diagrams

Multiple Push Button Stations and Hand-Off-Automatic Controls

Forward-Reverse Control, Jogging and Inching

Dc Motors and Sequence Control

Solid-State Dc Drives and Starting Methods for DC Motors

Stepping Motors, the Motor and Starting Methods

Autotransformer Starting , Resistor and Reactor Starting for Ac Motors

Wye-Delta Starting, Part Winding Starters

Braking , Consequent Pole Motors, Variable Voltage and Magnetic Clutches

Variable Frequency Control

Troubleshooting, Motor Installation and Developing Control Circuits

Programmable Logic Controllers and Start-Stop Push Button Control

Programming a PLC and Analog Sensing for Programmable Controllers

Filters