AST-trial-EXAM-1

Decide whether each of these statements is True (T) or False (F).A relay output channel from a PLC:(i) Is used for only d.c. switching.(ii) Can withstand transient overloads. Which option BEST describes the two statements?

(i) F (ii) T

The programmable logic controllers are used in __________.

1. Glass and paper industry 2. Process automation plants 3. Cement manufacturing

Convert denary number 100 to binary number: 100

110 0100

Convert octal 701 to binary

111000001

Convert hexadecimal number9F to denary number:

159

The hexadecimal equivalent of a binary 00100011 is __

23

Convert hexadecimal number D53 to denary number:

3411

Which of the following is most likely to be the voltage level used internally in a PLC, excluding the voltage levels that might occur during conditioning in output/input channels:

5V

Exclusive-OR (XOR) logic gates can be constructed from _________logic gates.

AND gates, OR gates, and NOT gates

Who invented the Programmable Logic Controller (PLC)?

Dick Morley

The form of training used to enforce the rules of organization is classified as

Discipline

The most popular language for PLCs is:

Ladder diagram

the term PLC stands for?

Programmable Logic Controller

System busses

The internal paths along which the digital signals flow within the PLC

What is Direct Current (DC)?

a flow of electrons along a circuit in one direction

Electric circuits are created in order to:

to perform a specific function

Decide whether each of these statements is True (T) or False (F).The reason for including optocouplers on input/output units is to:(i) Provide a fuse mechanism which breaks the circuit if high voltages or currents occur.(ii) Isolate the CPU from high voltages or currents. Which option BEST describes the two statements?

(i) F (ii) T

Decide whether each of these statements is True (T) or False (F). A limit switch:(i) Can be used to detect the presence of a moving part.(ii) Is activated by contacts making or breaking an electrical circuit.

(i) T (ii) T

Decide whether each of these statements is True (T) or False (F).A transistor output channel from a PLC:(i) Is used for only d.c. switching.(ii) Is isolated from the output load by an optocoupler. Which option BEST describes the two statements?

(i) T (ii) T

When an input signal 1 is applied to a NOT gate, the output is

0

The change in resistance of an electrical resistance strain gauge with a gauge factor of 2.0 and resistance 100 ( when subject to a strain of0.001 is:

0.2 ohms

A technology for the application of mechanical, electronics and computer-based systems to control and operate the systems is called

Automation

It may allow arithmetic operations, logic operators, block memory moves, computer interface, local area network, functions, etc.

CPU

In this control system, small components are attached to the industrial computer system with the help of a network and control is exercised. ​

DCS

The advantages of PLC are ____

Easy maintenance Reliability is high Small in size

The advantages of PLC are ______

Easy maintenance Reliability is high Small in size

What are the types of programmable logic controllers?

Fixed and modular PLC

The programmable logic controllers are used in __________

Glass and paper industry Cement manufacturing Process automation plants

Burns, cuts, electrical shock, amputation and absorption of chemicals are examples of hazards associated with arm injuries that's why we need a kind of protection.

Hand protection

The following are disadvantages of PLC control EXCEPT:

Have interfacing for inputs and outputs already inside the controller.

Which of these benefits of 6S are of value to your company?

Improved employee morale Improved safety Increased productivity Increased profitability

Which is not a benefit of Sort?

Improved machine dependability

What are the components that make the programmable logic controller work?

Input and output module CPU Power supply

Which one is NOT a benefit of Shine?

Inventory reduction

A NAND gate has ______ inputs and _______output.

LOW inputs and HIGH outputs

Which of these devices is a key part of a software program that controls the operations of the program?

Logic controls

This is where information is stored on the status of input and output devices and the values of timers and counters and other internal devices.

Memory

A diaphragm pressure sensor is required to give a measure of the gauge pressure present in a system. Such a sensor will need to have a diaphragm with:

One side open to the atmosphere. .

A circuit in which if one load fails, the others will still receive power and continue to function is called a:

Parallel circuit

Below are the main components of Programmable Logic Controller

Power Supply CPU I/O modules

It is an electronic device used in many industries to monitor and control construction systems and production processes.

Programmable Logic Controller

Which item is not a part of the Sort phase?

Putting tools at the point of use ​

A unit called Ohms is used to measure:

Resistance

What do you mean by SCADA?

Supervisory Control and Data AC

One of 6's means developing communication strategies and getting everyone involved while implementing daily auditing through daily workplace observation and displaying the daily scan diagnostic in a public place for all to see.

Sustaining

The internal paths along which the digital signals flow within the PLC

System busses

Memory

This is where information is stored on the status of input and output devices and the values of timers and counters and other internal devices.

What is the purpose of the policies and procedures

To help us act and behave professionally with each other, with customers and the environment

The following are advantages of PLC control EXCEPT

Too much work required in connecting wires.

It is usually the central part of a process control system.To run more complex processes it is possible to connect more PLC controllers to a central computer.

Traditional PLC

Below are the main components of Programmable Logic Controller EXCEPT

Traffic control

A common tool that specifies how a logic circuit's output depends on the logic levels present at the inputs?

Truth tables

Which of the following is the Boolean expression of the OR gate output?

X=A+B

included in a basic electric circuit?

a switch a load a power source a conductor

We measure current in a standard unit called

amperes

It is a mathematic system of logic in which truth functions are expresses as symbols and then these symbols are manipulated to arrive at conclusion

boolean algebra

When current flows around a complete electrical connection from one end to the other, it is a:

closed circuit

The outputs depends only on the current values of the input variables?

combination logic

An electric circuit is a configuration of:

components, wires and electricity

The function of a resistor is to:

control the flow of current to other components in a circuit

The only function of NOT gate is to

invert input signal

It is a logic gate whose output is the inverse or complement of its input.

inverter

Any number with an exponent of one is equal to

itself

Any number with an exponent of zero is equal to

one

Inductance is the tendency of an electrical conductor to:

oppose a change in the electric current flowing through it

The different electronic components in a circuit are connected using:

printed circuit board

The output can depend on present and also past values of the input and the output variables?

sequential logic

One of 6's which means physically cleaning and removing reasons for contamination, dust, debris, oil, etc.

shine

6's which means identifying needed items from items that are simply cluttering or are unnecessary to the process.

sorting

The function of a capacitor is to:

store energy in an electric circuit

What is voltage?

the difference in electrical potential between two places along an electrical circuit

Normally open contacts are open when:

when in put is not energized