review

Question 1

SEVEN BASIC ELECTRICAL DEVICES

Answer 1

Manually actuated push button switches
Limit switches
Pressure switches
Solenoids
Relays
Timers
Temperature switches

Question 2

Other devices used in electro pneumatics are

Answer 2

Proximity sensors
Electric counters

Question 3

A push button is a switch used to close or open an electric control circuit. They are primarily used for starting and stopping of operation of machinery.

Answer 3

Manually actuated push button switches

Question 4

There are two types classification of Limit switches depending upon method of actuations of contacts.

Answer 4

Limit switches

Question 5

A _______ is a pneumatic-electric signal converter. Pressure switches are used to sense a change in pressure, and opens or closes an electrical switch when a predetermined pressure is reached.

Answer 5

Pressure switches

Question 6

Electrically actuated directional control valves form the interface between the two parts of an electro pneumatic control. The most important tasks of electrically actuated DCVs include.

Answer 6

Solenoids

Question 7

A ______ is an electro magnetically actuated switch. It is a simple electrical device used for signal processing.

Answer 7

Relays

Question 8

_____ are required in control systems to effect time delay between work operations.

Answer 8

Timers

Question 9

___________automatically senses a change in temperature and opens or closes an electrical switch when a predetermined temperature is reached.

Answer 9

Temperature switches

Question 10

There are two types of electronic sensors with regard to the polarity of output voltage.

Answer 10

Positive switching sensors
Negative switching sensors

Question 11

In this output voltage is zero if no part is detected in the proximity.

Answer 11

Positive switching sensors

Question 12

In this the supply voltage are applied to the output if no part is detected in the proximity

Answer 12

Negative switching sensors

Question 13

______ use currents induced by magnetic field to detect the nearby metal objects.

Answer 13

Inductive sensors

Question 14

_____ are able to detect most materials at distances up to a few centimeters.

Answer 14

Capacitive sensors

Question 15

Light sensors have been used for almost a century-originally photocells were used for applications such as reading audio tracks on motion pictures.

Answer 15

Optical proximity sensors

Question 16

_____ use light focused over a given range, and a sensitivity adjustment is used to select a distance.

Answer 16

Diffuse sensors

Question 17

There are three main high energy rate forming processes:

Answer 17

1. Explosive forming,
2. Magnetic forming
3. Electro-hydraulic forming

Question 18

Types of production systems

Answer 18

Continuous flow process
Mass Manufacturing of Discrete Products
Batch Production
Job shop Production

Question 19

Manufactured product is in continuous quantities i.e., the product is not a discrete object.

Answer 19

Continuous flow process

Question 20

Products are discrete objects and manufactured in large volumes.

Answer 20

Mass Manufacturing of Discrete Products

Question 21

In a batch production process the product is either discrete or
continuous.

Answer 21

Batch Production

Question 22

Typically designed for manufacturing small quantities of discrete products, which are custom built, generally according to drawings supplied by customers.

Answer 22

Job shop Production

Question 23

Types of Automation Systems

Answer 23

Fixed Automation
Programmable Automation
Flexible Automation
Integrated Automation

Question 24

It is used in high volume production with dedicated equipment, which has a fixed set of operation and designed to be efficient for this set.

Answer 24

Fixed Automation

Question 25

It is used for a changeable sequence of operation and configuration of the machines using electronic controls.

Answer 25

Programmable Automation

Question 26

It is used in Flexible Manufacturing Systems (FMS) which is invariably computer controlled.

Answer 26

Flexible Automation

Question 27

It denotes complete automation of a manufacturing plant, with all processes functioning under computer control and under coordination through digital
information processing.

Answer 27

Integrated Automation

Question 28

Systematic Economic Activity that could be related to Manufacture/Service/
Trade.

Answer 28

Industry

Question 29

is a set of technologies that results in operation of machines and systems without significant human intervention and achieves performance superior to manual operation.

Answer 29

Automation

Question 30

is a set of technologies that achieves desired patterns of variations of operational parameters and sequences for machines and systems by providing the input signals necessary.

Answer 30

Control

Question 31

Manufacturing processes, basically, produce finished product from raw/unfinished material using energy, manpower and equipment and
infrastructure.

Answer 31

Role of automation in industry

Question 32

Typical industrial product life cycle

Answer 32

a. Market feedback
b. Research and Development
c. Product is designed
d. Process Planning and Installation
e. Production quality control

Question 33

Reduction in cost per unit resulting from increased production, realized through operational efficiencies.

Answer 33

Economy of Scale

Question 34

The situation that arises when the cost of being able manufacture multiple products simultaneously proves more efficient than that of being able manufacture single product at a time

Answer 34

Economy of Scope -