Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

DCS > Midterm Review > Flashcards

Midterm Review Flashcards

1
Q

Advantages of using fiber optics vs copper cabling

A

Increased bandwidth
noise immunity
lower power consumption

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Undesirable electrical signals which distort or interfere with the original signal

A

Noise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Maximum cable length for RS-485 utilizing a copper conductor

A

1200 meters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How many drivers/masters are allowed on an RS-232 segment?

A

1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How many receiver/slaves are allowed on an RS-422 segment?

A

10

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

statements about RS-232

A

RxD carries data from the DCE to corresponding pin on the DTE
CTS is an output from the DCE
DCE stands for Data Communication Equipment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The maximum Baud rate for RS-485 is

A

10 Mbps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Cable used to connect a DCE device to a DTE device

A

Straight through cable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

_____is NOT considered a common data code used in modern data communication systems?

A

Morse

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

DCS Manufacturer and system name, was the first on the market

A

Yokogawa, Centum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

In what year was the first DCS system commissioned?

A

1975

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The rate at which a signal changes

A

Baud Rate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The four most important control devices

A

DCS, PLC, Smart Instruments and microprocessors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

A system that has been superseded by newer technology

A

legacy control system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

DCS

A

Distributed Control System

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How many bits are in a byte

A

8

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

4 bits

A

nibble

18
Q

4 bytes

A

IP

19
Q

2 nibbles

A

1 byte

20
Q

max integer

A

255

21
Q

Communication mode used for simultaneous bidirectional communications

A

Full duplex

22
Q

Basic Cable types

A

Fiber Optic cable
Coaxial cable
twisted pair cable
two wire

23
Q

The speed of an RS-232 transmission is inversely proportional to the length of the cable

A

true

24
Q

An asynchronous system incorporates a clock signal so the receiver and transmitter can remain synchronized

A

false (it has no global clock)

25
Q

a modem is used to convert digital data to an analog signal for transmission over long distances

A

true

26
Q

A two wire RS422 system is capable of communicating in a full duplex manner

A

False (4 wires)

27
Q

A two wire RS232 system is capable of communicating in a full duplex manner

A

True

28
Q

A four wire RS485 system is capable of communicating in a full duplex manner

A

True

29
Q

A balance, 4 wire transmission system, is only capable of half duplex communications

A

false (capable of full)t

30
Q

Emile Baudot was the inventor of the first practical telegraph system

A

false ( he came up with the baud code, baud rate was named after him)

31
Q

Samuel Morse used 5 bits to represent his 32 characters for serial data transmission

A

False

32
Q

the general property of any copper cable type if that attenuation increases as frequency decreases

A

False

33
Q

A frequency of 2200 Hz represents a 1 in HART protocol

A

False

34
Q

10 micron single mode fiber optic cable has the ability to transfer data up to 10000 metres in distance

A

true

35
Q

A modem is used to convert analog data to a digital signal for transmission over long distances

A

false

36
Q

The resistance of a copper cable increases as the cross sectional area increases

A

false

37
Q

A #20AWG cable has a larger diameter than a #14AWG cable

A

false

38
Q

electrical noise coupling methods

A 
electromagnetic radiation
electrostatic
Impedance
magnetic
is this right?
39
Q

The RS-485 system utilizes a balanced transmission system which requires 2 conductors per signal

A

true

40
Q

The RS serial communication standard use a POSITIVE voltage to define a logic 0 state, and a NEGATIVE voltage to represent a logic 1 state for DATA lines

A

true

41
Q

The RS serial communication standard use a NEGATIVE voltage to define a logic 0 state, and a POSITIVE voltage to represent a logic 1 state for CONTROL lines

A

true

42
Q

resistors at the end of the serial bus topologies are

A

100-120 ohms

DCS (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions