One

Question 1

used to determine the distance of a known fault on the cable plant from a specific locatoin

Answer 1

TDR

Question 2

a device that assists in testing return ingress at a tap location using an available dust cap cover port

Answer 2

I stop

Question 3

the most common home theatre connection, with sound broken out into two separate cables, color coded fro left and right audio

Answer 3

composite

Question 4

typically used for audio, this is a form of modulation in which the amplitude of a signal changes in accordance with the instantaneous value of the modulating signal

Answer 4

AM

Question 5

in signal processing, this term refers to an effect that causes different signals to become indistinguishable when sampled

Answer 5

aliasing

Question 6

known as an intra-coded picture

Answer 6

I pic

Question 7

a design philosophy where the loss of the cable and other passive devices before an amplifier station equals its gain

Answer 7

unity gain

Question 8

a discontinuous signal whose various states are discrete intervals apart.

Answer 8

digital signal

Question 9

this type of test requires a reference pattern to be sent in order to interpret if errors are present

Answer 9

closed loop testing

Question 10

this RF passive device has a loss of 3.01dB, disregarding all other internal circuitry

Answer 10

splitter

Question 11

the number of bits per symbol transmitted in a 256 QAM channel

Answer 11

8 bits

Question 12

this theorem states that in order to obtain an accurate recreation of a signal, it must be sampled at a rate of at least twice the highest frequency.

Answer 12

Nyquist’s rule

Question 13

as the modulation rate increases in a constellation diagram, the symbol regions decrease and are what fraction of the prior region

Answer 13

25% (a quarter)

Question 14

the minimum heel length for new and used boots

Answer 14

3/4” ; 1/2”

Question 15

a digital connection that can carry both digital video and up to eight channels of audio on a single cable

Answer 15

HDMI

Question 16

the maximum volume at 3m of the Xfinity home smoke and or heat detector sounder

Answer 16

85 dBa

Question 17

this is determined by the ratio between the digital carrier RMS level and the noise floor RMS level

Answer 17

carrier to noise ratio

Question 18

Distortion components caused by non-linear mixing of carriers in the transmission system

Answer 18

Carrier to Coherent Interference

Question 19

Generally HUM at low frequency—60Hz from the power system, 120Hz from linear power supplies, < 1 KHz from switching power supplies, and other low frequency sources.

Answer 19

Carrier to Low Frequency Distortion

Question 20

Continuous unwanted signal within the channel pass band that can affect digital decoding but has minimal adverse effect on analog signals

Answer 20

Carrier to Sustained Impairments (CI)

Question 21

Digital effect due to power loading on amplifier circuits, generally present in processing equipment.

Answer 21

Spectral Regrowth

Question 22

– In the analog world, this results in “Ghosting” or “fringing,” also known as “ringing.” These are reflections that, if high enough in level in relation to the carrier, cause digital decoding problems

Answer 22

Multipath and Micro-reflections

Question 23

Generally has no effect in the analog world, but can cause severe reliability problems in digital carriers. This is usually due to oscillator instability in processing equipment.

Answer 23

Phase Noise

Question 24

Result of the presence of any of the distortion components listed above that cause an error in the digital decoding

Answer 24

Amplitude and Phase Distortion

Question 25

a signal deviation typically caused by coax impairments

Answer 25

linear distortion

Question 26

nominal acceptable C/N for reliable operation is:

Answer 26

QPSK - 12dB 16QAM - 20dB 64QAM - 31dB 256QAM - 38dB

Question 27

There are numerous factors that contribute to digital carrier stability

Answer 27

Type of programming Compression ratios SD vs HD

Question 28

480nm

Answer 28

blue light

Question 29

455nm

Answer 29

violet

Question 30

1310nm in terms of where on the spectrum

Answer 30

infra red

Question 31

type of voice trunking used by a soft switch

Answer 31

SIP

Question 32

this is caused by the signal hitting an uneven surface and is reflected in many different directions

Answer 32

scattering

Question 33

when overlaying access points use the same channel or channels with overlapping frequencies causing connectivity issues for customers

Answer 33

co channel interferences

Question 34

when an object takes in the signal and retains some or all of it

Answer 34

absorption

Question 35

a technique used to keep upstream energy separate from downstream energy

Answer 35

frequency division multiplexing

Question 36

active devices use employ this to establish a clear path between the upstream and downstream energy

Answer 36

diplex filter

Question 37

48.09

Answer 37

48.09

Question 38

Function of a sweep meter zeros out the frequency response at a particular location in the network

Answer 38

Normalization

Question 39

the reference carrier under test for a specification of +-2 dB

Answer 39

ICFR

Question 40

the boundaries in the coaxial plant that can help to determine where faults, impedance mismatches are located

Answer 40

reflection zone

Question 41

type of distortion most often caused by external interference or ingress

Answer 41

non linear distortion

Question 42

measurement of signal amplitude (in ICFR chart) deviating up or down in .75dB increments

Answer 42

ripples

Question 43

these are samples in time, not physical locations, in the plant

Answer 43

taps

Question 44

the signal measured at the CMTS from the customers DOCSIS device

Answer 44

upstream receive power

Question 45

a measurement of the signal level from the DOCSIS device to the CMTS

Answer 45

upstream transmit power

Question 46

the comparison of the signal received at the headend from the customers DOCSIS device to the noise floor.

Answer 46

upstream SNR

Question 47

750 nm

Answer 47

red

Question 48

550 nm

Answer 48

green

Question 49

ccs

Answer 49

concurrent call sessions

Question 50

ISDN

Answer 50

integrated services digital network

Question 51

consists of 23 b-channels and 1 d-channels

Answer 51

pri

Question 52

known for its standard 1.544 Mbps bandwidth

Answer 52

T1

Question 53

when a signal passes through an object and the signal is redirected

Answer 53

refraction

Question 54

when a wireless signal hits a smooth object and bounces off the surface

Answer 54

reflection

Question 55

Name 3 aerial lift vehicle limits

Answer 55

Max boom lift capacity Max bucket load capacity Payload and chassis weight

Question 56

When it is necessary to raise and lower tools or equipment from the bucket, you would use

Answer 56

a hand line

Question 57

Examples of some critical welds that warrant special attention on your daily inspection of the aerial lift vehicle are located where

Answer 57

Turret wings are welded to the base plate Cylinder mounts are welded to the boom Cylinder mounts are welded to the turret Welds are on the platform support

Question 58

The semi-annual maintenance checks for Aerial Lift Vehicles include:

Answer 58

Changing the hydraulic filter Inspecting the hydraulic oil Checking all valve pressure settings

Question 59

Aerial Lift Vehicle Cab inspection requires the check of the following items:

Answer 59

Fire extinguisher First aid kit and flares Lights Wheel chocks

Question 60

Weekly check of Aerial Lift Vehicles include

Answer 60

``` Battery condition Fan belt pump Rotation chain Bolt tightness Stabilizers Proper operations ```

Question 61

Name the types of decals that you would find in an Aerial Lift

Answer 61

Danger, Warnings, Cautions and operating instructions/notice

Question 62

Hazards of driving a heavy duty Aerial lift vehicle driving hazards include:

Answer 62

``` Length, height, width, weight, boom, bucket, turning radius stopping distance ```

Question 63

Three common causes of aerial lift accidents

Answer 63

Stability problems, Operator error, Violating OSHA regulations

Question 64

contain all the information to be transmitted and serve as reference points

Answer 64

I-picture

Question 65

which only carry information about which pixels change in relation to the i-frame

Answer 65

P-picture

Question 66

which carry information about which pixels change in relation to the i-frame for transmitted and to-be-transmitted frames

Answer 66

B-picture

Question 67

Wi-Fi Optimized Home visits (both TC and PRO installs) we have broken them down into 5 major steps.

Answer 67

``` Arrival and Initial Assessment; Discussion with Customer; Detailed Assessment, Device Placement and Install; Test and Fortify; Demonstration and Customer Education; ```

Question 68

The four types of tapers

Answer 68

Shoulder tapers Shifting tapers Merging tapers (lane closure tapers) Downstream tapers

Question 69

area that separates road users from the work area or an unsafe area.

Answer 69

Buffer spaces, allow for some recovery time from an errant vehicle and some bailout time for workers in the work area.

Question 70

goal of a traffic control zone

Answer 70

allow work to proceed safely with minimum traffic disruption

Question 71

This assists customers with visual disabilities with finding tv shows and movies independently

Answer 71

Voice guidance