Fibre

Question 1

What is the regulation for storage of chemicals?

Answer 1

COSHH

Question 2

What do you do if you discover asbestos?

Answer 2

Stop work seal/lock area where possible and inform site manager

Question 3

What regulation controls work carried out on highways

Answer 3

NRSWA

Question 4

What is the hazardous laser classification

Answer 4

BS EN 60825

Question 5

Si unit for length

Answer 5

Meter

Question 6

Si unit for time

Answer 6

S- Seconds

Question 7

Si unit for electric current

Answer 7

Ampere-a

Question 8

What factor is mega

Answer 8

10⁶ or 1,000,000

Question 9

How is the current on a dc

Answer 9

The current is constant

Question 10

What is the equation for refraction index or index of refraction?

Answer 10

Refraction index=speed in vacuum
Speed of light in medium

Question 11

What does frequency refer to

Answer 11

How often something happens

Question 12

What is the equation for ohm’s law

Answer 12

Question 13

How is amplitude measured

Answer 13

From crest to rest

Question 14

What is attention related to

Answer 14

Distance so if distance is lager so is attention

Question 15

What is bandwidth measured in

Answer 15

Mega hertz MHz

Question 16

If bandwidth increases what happens

Answer 16

Distance decreases

Question 17

If 3 db loss what % of power is lost

Answer 17

Question 18

What is a ld (laser diode) used for

Answer 18

Single mode

Question 19

What is a led (light emitting diode) used for

Answer 19

Multi mode

Question 20

What are the parts of a fibre cable

Answer 20

The core
The cladding

Question 21

What size is a multi mode core

Answer 21

50um or 62.5um

Question 22

What is the size of a single mode core

Answer 22

8-10 um core

Question 23

What is base band

Answer 23

Where 1 signal is being sent along 1 channel

Question 24

What is broadband

Answer 24

Multiple base band signals

Question 25

What does 10BASE2/5/T/F Mean

Answer 25

Question 26

What does 10BASE2/5/T/F Mean

Answer 26

Question 27

What is the differences between analog and digital signals

Answer 27

Question 28

What is serial/half duplex

Answer 28

It is the transmission and receiving of a signal but not at the same time

Question 29

Parallel/full duplex

Answer 29

When signals can be sent and received at the same time like on a phone call

Question 30

What is dispersion

Answer 30

Question 31

What is modal dispersion

Answer 31

Modal dispersion is only in multi node fibres is where different rays travel in different modes of propagation having different path lengths.as distance and frequency increase the likelihood increases

Question 32

What is chromatic dispersion

Answer 32

In single mode it is the difference in wavelength of the light

Question 33

What is stepped index

Answer 33

Question 34

What is graded index

Answer 34

Question 35

What is graded index

Answer 35

Question 36

What are the 3 types of testing

Answer 36

Visible light sources (laser) Loss test set(light scourses and power meter) Optical time domain reflectomiter(OTDR)

Question 37

What is the formula for velocity

Answer 37

V=f× wavelength

Question 38

What is the unit for current?

Answer 38

Amperes

Question 39

Which is bigger si from list

Answer 39

Giga

Question 40

What is the relationship between attenuation and distance

Answer 40

Directly proportional

Question 41

Relationship between bandwidth and distance

Answer 41

Inversely proportional

Question 42

Which has the highest bandwidth

Answer 42

Om4

Question 43

What percentage of splices must be 0.3 db or below

Answer 43

100%

Question 44

What could 10,000,000 bits per second also be known as

Answer 44

10mbps

Question 45

What area network is used for 3 buildings in 3 different countries?

Answer 45

Wide area Network

Question 46

How many bits are in a bite

Answer 46

8

Question 47

Where would you put splices

Answer 47

Splice bridge

Question 48

Over 2km questions?

Answer 48

3.5×2=7

Question 49

Where would you do the first gass test

Answer 49

Confined space opening

Question 50

What did cat 6 cable measured in

Answer 50

Mega bits per second

Question 51

What is the si unit for temperature

Answer 51

Kelvin

Question 52

Speed of light in glass

Answer 52

1.5

Question 53

What type of light is used for telecommunications

Answer 53

Non visible infrared

Question 54

400 to 750

Answer 54

Visible light