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Electronic Specialist > E-Tech > Flashcards

E-Tech Flashcards

1
Q

DNS

A

Domain Name System

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2
Q

DHCP

A

Dynamic Host Configuration Protocol

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3
Q

RIP

A

Routing Information Protocol

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4
Q

IP

A

Internet Protocol

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5
Q

HTTP

A

Hypertext Transfer Protocol

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6
Q

HTTPS

A

Hypertext Transfer Protocol Secure

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7
Q

TCP

A

Transmission Control Protocol

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8
Q

RAM

A

Random Access Memory

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9
Q

ROM

A

Read Only Memory

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10
Q

Full Duplex

A

TX / RX at the same time

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11
Q

Half Duplex

A

TX / RX one at a time

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12
Q

SSH

A

Secure Shell

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13
Q

CDP

A

Cisco Discovery Protocol

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14
Q

SSD

A

Solid State Disk

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15
Q

NTP

A

Network Time Protocol

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16
Q

LAN

A

Local Area Network

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17
Q

NIC

A

Network Interface Card

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18
Q

Standard Telephone Frequency Range

A

300Hz - 3400 Hz

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19
Q

Cat5e Max Length

A

100 meters / 328ft

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20
Q

RJ45

A

Cat5E connectors

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21
Q

Plenum

A

Cable used inside walls in commercial installations, ducts, walls, and ceilings

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22
Q

Difference of Cat5 and Cat6

A

Cat6 can transfer more data, has more twists to reduce interference and crosstalk

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23
Q

POSR

A

Power On Stick Relay

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24
Q

RS232

A

Serial Cable

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25
Q

DP, VGA, HDMI, DVI

A

Video interfaces

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26
Q

CRC

A

Cyclic Redundancy Check

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27
Q

Power (Watts) Formula 1

A

Voltage x Current

28
Q

Power (Watts) Formula 2

A

V(squared) / Resistance

29
Q

Total Capacitance (Series)

A

1Cs = 1/C1 + 1/C2 + 1/C3 …etc.

30
Q

Total Capacitance (Parallel)

A

Cp = C1 + C2 + C3 …etc

31
Q

Network Hub

A

Node that broadcasts data to every computer or Ethernet-based device connected to it. (More cost effective)

32
Q

Network Switch

A

Device that channels incoming data from any one of multiple input ports to the specific output port that will take it toward its intended destination.

33
Q

Linux Commands - List Files/Directories

A

LS

34
Q

Linux Commands - Format Disk

A

sudo mkfs

35
Q

Windows Active Directory

A

Enables administrators to manage permissions and access to network resources.

36
Q

Windows CMD - Clear Printer Spool

A

net stop printer spool

37
Q

Windows CMD - List All Running Processes

A

net stat

38
Q

Windows Server Backup Utility Location

A

< BackupStorageLocation >WindowsImageBackup< ComputerName >

39
Q

Windows Server Change User Permissions Utility

A

Group Policy - “mmc”

40
Q

Resistor Bands

A

Billy Brown Runs Over Your Garden But Violet Gray Walks

Black (0), Brown (1), Red (2), Orange (3), Yellow (4), Green (5), Blue (6), Violet (7), Gray (8), White (9)

41
Q

Resistor Bands Multiplier

A

1, 10, 100, 1k, 10k, 100k, 1M, 10M, 100M, 1G

42
Q

Resistor Bands Tolerance

A

Gold 5%, Silver 10%, No Band 20%

43
Q

Formula to Find Watts

A

Watts = Amps x Volts

44
Q

48v from 8 12v batteries

A

2 sets of 4 in series, both sets connected in parallel

45
Q

Lead Acid Cell Nominal Voltage

A

2.2V

46
Q

Linux Root User

A

Only user to make changes to system files and settings

47
Q

28 Test

A

Laptop connects to WIU J8 Ethernet Port

48
Q

Test 36

A

0.06 Shunt

49
Q

AMT 23 #162

A

Audio-frequency Track Transmitters and Receivers, or Equivalent systems of like frequencies must be separated by length of case, or in separate housings. A receiver of less than 8kHz must be separated from unrelated transmitters of the same frequency by at least 10 miles or 2 sets of IJ’s. Changes must be approved by Office of Deputy Chief Engineer C&S.

50
Q

Test 19

A

Fouling Circuits and Shunt Wires
Every 90 days

51
Q

Test 23

A

Ensures that new installations or modifications to existing installations are operating as intended.

52
Q

Test 28

A

At least every 90 days or new installations
To make sure transponders are in good condition and are capable of reading to trains.
To test that WIU is working as intended sending and receiving correct messages to trains.

53
Q

Test 32

A

HotBox Detectors
Inspect every 30 days
Calibrate once a year
Dragging Equipment
Inspect every 30 days
Test at least once a year

54
Q

What is DNS used for?

A

It gives names to IP addresses.

55
Q

What is DHCP used for?

A

Automatically assigns IP addresses and other configurations to devices that connect to a network.

56
Q

What is RIP used for?

A

Defines how routers should share information when moving traffic among an interconnected group of local area networks

57
Q

What is SSH used for?

A

Allows users to securely connect to a remote server over an unsecured network

58
Q

Difference between SSD and HDD

A

SSDs store data in flash memory, while HDDs store data in magnetic disks.

59
Q

What is NTP used for?

A

Synchronizes computer clocks across a network with a central time source, usually Coordinated Universal Time (UTC)

60
Q

Multi-mode Fiber Jacket

A

Orange

61
Q

Multi-mode Fiber Bandwidth

A

850 - 1300nm

62
Q

Single Mode Fiber Jacket

A

Yellow

63
Q

Single Mode Fiber Bandwidth

A

1310 - 1550nm
More Bandwidth and smaller

64
Q

Fiber Color Code #5

A

Slate/Gray

65
Q

Optical Time-Domain Reflector

A

For testing the integrity of cables like splice loss, length, and finding faults

Electronic Specialist (1 decks)

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