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Flashcards in various ct level questions Deck (119)
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1

Two causes for an aerial lift to cease functioning while aloft

Hydraulic lift malfunctionInoperable upper controls

2

Three aerial lift operational hazards

ElectrocutionInjuries from falling, equipment failure, and unstable maneuveringTraffic lanes

3

Describe how the commtech's role may contribute to a successful preventative maint. program?

Respond quickly and efficiently to restore serviceperform work without degrading or interrupting serviceWork toward preventative maint. rather than repair

4

Three main causes of aerial lift accidents?

stability problemsoperator errorviolating OSHA regulations

5

How often are vehicle maint. checks completed?

Daily, weekly, monthly, bi-monthly, and semi-annually

6

Once completed the FCC form 320 is kept in?

The public file

7

Output C/N improves by _____ for each dB the input is raised?

1dB

8

What are two fiber splicing methods?

FusionMechanical

9

Hum modulation is measured in?

Percentages

10

Why is 16 QAM a faster modulation technique than QPSK?

Four amplitude levels are used.(2 above and 2 below each axis)

11

What is considered to be a 'headend' FCC POP test?

Differential Gain Differential Phase

12

T or F The video carrier under test must be on for the CTB measurement?

False

13

What do you test prior to operating from the aerial lift bucket

Always test the lift controls from the ground daily and verify that all are operating properly

14

7 Touchstones

DiversityRespectQualityEthicsEnthusiasmEmployee FocusFlexibility

15

What is an advantage that rebuilding a system has over an upgrade

Rebuilding increases the useable bandwidth

16

A reflection with the same polarity as the launch reflection indicates a(n)?

Open

17

What is Comcasts goal for network reliability?

4 nines / 99.99%

18

ICFR must be measured through a _______

Set-top-box

19

The _______ is the load-bearing component of an aerial hardline cable installation

Strand

20

What is meant by single mode?

One wavelength

21

Batteries should be within ____ VDC of each other

.3VDC

22

Which architecture offers the highest level of reliability?

Ring

23

Maximum length of data carrying CAT5

328' or 100 meters

24

Three parts of fiber

Core CladdingCoating

25

Three criteria for positioning your aerial lift

Minimize reachAvoid overhead obstaclesProvide safe and proper lift rotation

26

What material is used for doping fiber amps in the 1550nm band?

Erbium

27

When a loss of AC is determined to be a power company problem you should?

Contact the power company and follow your systems stand-by generator procedures

28

Deactivate anonymous call rejection

*87

29

Refractive index

Ratio of the velocity of light of two mediums of optical glass

30

Port-to-port isolation

The difference between the two output ports with the input port terminated