Fundamentals of Mixed Signals and Sensors Quiz: Switches and Relays

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Questions and Answers

Which type of switch is used to make momentary contact for a brief period of time or as long as the button is pressed?

Single Pole Double Throw (SPDT)

Momentary action switch (correct)

Single Pole Single Throw (SPST)

Latched action switch

What is the main difference between a momentary action switch and a latched action switch?

Method of activation

Number of input contacts

Type of circuit controlled

Duration of contact (correct)

In electronic switches, how are they activated to control a circuit?

By semiconductor action (correct)

By make or break action

By physical movement

By releasing or touching contacts

What determines what the switch armature is connected into?

Pole Signup and view all the answers

Which type of switch consists of one input contact and one output contact, allowing it to either make (ON) or break (OFF) the load?

Single Pole Single Throw (SPST) Signup and view all the answers

What is the main function of a switch in a circuit?

To act as a control device Signup and view all the answers

Which type of switch has three terminals and consists of two ON positions and one OFF position?

Single Pole Double Throw (SPDT) Signup and view all the answers

How many poles and throws does a Double Pole Single Throw (DPST) switch have?

Two poles, one throw Signup and view all the answers

What is the purpose of a limit switch?

To be operated by the presence of an object or by the motion of a machine Signup and view all the answers

How many ON positions does a Double Pole Double Throw (DPDT) switch have?

Two ON positions Signup and view all the answers

Which type of switch is manually actuated by a mechanical handle, lever, or rocking mechanism?

Toggle Switch Signup and view all the answers

How many terminals does a Double Pole Single Throw (DPST) switch consist of?

Four terminals Signup and view all the answers

What is the main characteristic of a Micro Switch?

It is operated by the presence of an object or by the motion of machine instead of human hand operation Signup and view all the answers

What is the distinguishing feature of a Normally Open Push Button (PBNO)?

It is red in color Signup and view all the answers

What type of operation does a relay typically perform?

Electromechanical switching Signup and view all the answers

Study Notes

Switch Types

Momentary action switches are used to make momentary contact for a brief period of time or as long as the button is pressed.
Latched action switches, on the other hand, remain in their set state until reset.

Switch Operation

Electronic switches are activated to control a circuit when an input signal or action turns the switch on or off.
The switch armature is connected into a specific circuit or load, determined by the switch's configuration and purpose.

Basic Switches

A Single Pole Single Throw (SPST) switch has one input contact and one output contact, allowing it to either make (ON) or break (OFF) the load.

Switch Functions

The main function of a switch in a circuit is to connect or disconnect the circuit, allowing or blocking the flow of electrical current.

Specialized Switches

A Double Pole Double Throw (DPDT) switch has three terminals and consists of two ON positions and one OFF position, allowing it to switch between two separate circuits.
A Double Pole Single Throw (DPST) switch has two poles and two throws.
A limit switch is used to detect the physical presence or absence of an object, and is often used in safety and control applications.

Micro Switches

A Micro Switch is a type of switch that is manually actuated by a mechanical handle, lever, or rocking mechanism.
Micro Switches are characterized by their small size and low operating force.

Push Button Switches

A Normally Open Push Button (PBNO) switch is characterized by its normally open state, which closes the circuit when pressed.

Relays

A relay typically performs a switching operation, connecting or disconnecting a circuit in response to an input signal.

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Description

This quiz covers the fundamentals of switches and relays, including their functions, types, and applications. Topics include basic switch functions, momentary action, and the role of switches as control devices. It is based on the course CPE 10 Fundamentals of Mixed Signals and Sensors by ENGR. Joel Anthony L. Sevilla.