Flashcards in various ct level questions Deck (119)
Two causes for an aerial lift to cease functioning while aloft
Hydraulic lift malfunctionInoperable upper controls
Three aerial lift operational hazards
ElectrocutionInjuries from falling, equipment failure, and unstable maneuveringTraffic lanes
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
Three main causes of aerial lift accidents?
stability problemsoperator errorviolating OSHA regulations
How often are vehicle maint. checks completed?
Daily, weekly, monthly, bi-monthly, and semi-annually
Once completed the FCC form 320 is kept in?
The public file
Output C/N improves by _____ for each dB the input is raised?
What are two fiber splicing methods?
Hum modulation is measured in?
Why is 16 QAM a faster modulation technique than QPSK?
Four amplitude levels are used.(2 above and 2 below each axis)
What is considered to be a 'headend' FCC POP test?
Differential Gain Differential Phase
T or F The video carrier under test must be on for the CTB measurement?
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
What is an advantage that rebuilding a system has over an upgrade
Rebuilding increases the useable bandwidth
A reflection with the same polarity as the launch reflection indicates a(n)?
What is Comcasts goal for network reliability?
4 nines / 99.99%
ICFR must be measured through a _______
The _______ is the load-bearing component of an aerial hardline cable installation
What is meant by single mode?
Batteries should be within ____ VDC of each other
Which architecture offers the highest level of reliability?
Maximum length of data carrying CAT5
328' or 100 meters
Three parts of fiber
Three criteria for positioning your aerial lift
Minimize reachAvoid overhead obstaclesProvide safe and proper lift rotation
What material is used for doping fiber amps in the 1550nm band?
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
Deactivate anonymous call rejection
Ratio of the velocity of light of two mediums of optical glass