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Вопросы по оптическим кабелям

Total questions: 108

Worksheet time: 1hrs 2mins

Name
Class
Date
1.

В каком году на железной дороге стали применять оптические кабели?

a)

1985 г

b)

1990 г

c)

1976 г

d)

1983 г

e)

1993 г

2.

Чему равна пропускная способность оптических кабелей?

a)

более 100 000 каналов ТЧ

b)

до 480 каналов ТЧ

c)

до 10 800 каналов ТЧ

d)

до 16 каналов ТЧ

e)

до 32 каналов ТЧ

3.

Какие цепи несут линии I класса?

a)

магистральные, дорожные и оперативно-технологические

b)

станционные

c)

местные

d)

телефонные

e)

телеграфные

4.

Какие цепи несут линии II класса?

a)

дорожные и оперативно-технологические

b)

станционные

c)

местные

d)

телефонные

e)

телеграфные

5.

Какие цепи несут линии III класса?

a)

местные

b)

магистральные

c)

дорожные

d)

оперативно-технологические

e)

станционные

6.

Как называется электрическое изделие, состоящее из одной или нескольких изолированных жил, заключенных в металлическую или неметаллическую оболочку?

a)

кабелем

b)

проводом

c)

шнуром

d)

фидером

e)

все ответы верны

7.

Как называется изделие, состоящее из одной неизолированной жилы, изготовленной из одной или нескольких скрученных проволок, заключенных в неметаллическую оболочку?

a)

проводом

b)

кабелем

c)

шнуром

d)

фидером

e)

цепью

8.

В зависимости от области применения кабели связи разделяются на…

a)

магистральные, зоновые, сельские, городские, проводные

b)

подземные, подвесные, подводные

c)

низкой частоты и высокой частоты

d)

симметричные и коаксиальные

e)

волоконно-оптические

9.

В зависимости от условий прокладки и эксплуатации, кабели разделяются на…

a)

подземные, подвесные, подводные

b)

магистральные, зоновые, сельские, городские, проводные

c)

низкие частоты и высокие частоты

d)

симметричные и коаксиальные

e)

волоконно-оптические

10.

По спектру передаваемых частот, кабели связи делятся на…

a)

низкочастотные и высокочастотные

b)

подземные, подвесные, подводные

c)

магистральные, зоновые, сельские, городские, проводные

d)

симметричные и коаксиальные

e)

волоконно-оптические

11.

По конструкции и взаимному расположению проводников кабели связи делят на…

a)

симметричные и коаксиальные

b)

низкочастотные и высокочастотные

c)

подземные, подвесные, подводные

d)

магистральные, зоновые, сельские, городские, проводные

e)

волоконно-оптические

12.

Как называется цепь, состоящая из двух одинаковых в электрическом и конструктивном отношениях изолированных проводников?

a)

симметричной

b)

коаксиальной

c)

волоконной

d)

воздушной

e)

направляющей системой

13.

Какая цепь, состоит из двух цилиндров со совмещенной осью, где цилиндр - сплошной проводник, концентрически расположенный внутри цилиндра - полого?

a)

коаксиальной

b)

симметричной

c)

волоконной

d)

воздушной

e)

направляющей системой

14.

В структурной схеме волоконно-оптической линии передачи, какое устройство предназначено для преобразования электрических сигналов в

4 lines
15.

In the structural scheme of a fiber-optic transmission line, which device is designed to convert electrical signals into optical ones?

a)

transmitting optoelectronic module

b)

receiving optoelectronic module

c)

encoder

d)

decoder

e)

frequency converter

16.

In the structural scheme of a fiber-optic transmission line, which device is designed to convert optical signals into electrical ones?

a)

receiving optoelectronic module

b)

transmitting optoelectronic module

c)

encoder

d)

decoder

e)

frequency converter

17.

What belongs to the first group of NS?

a)

symmetric circuit and coaxial circuit

b)

metallic waveguides, dielectric waveguides

c)

air lines

d)

fiber-optic lines

e)

communication lines

18.

What belongs to the second group of NS?

a)

metallic waveguides, dielectric waveguides, light guides

b)

symmetric circuit and coaxial circuit

c)

air lines

d)

fiber-optic lines

e)

communication lines

19.

Which circuits are designed for transmitting large volumes of information over long distances and for further communication?

a)

light guides

b)

metallic waveguides

c)

homogeneous

d)

strip

e)

coaxial

20.

Which Maxwell's equation shows that an electric field creates a magnetic field around it?

a)

first

b)

second

c)

third

d)

fourth

e)

fifth

21.

Which Maxwell's equation shows that any change in the magnetic field is accompanied by the formation of an electric field?

a)

second

b)

first

c)

third

d)

fourth

e)

fifth

22.

Which mode covers relatively slowly changing fields, when displacement currents in the dielectric can be neglected?

a)

quasi-stationary

b)

static

c)

stationary

d)

wave

e)

electromagnetic

23.

Which mode is characteristic of processes in free space and dielectric, where conduction currents are absent?

a)

wave and quasi-optical

b)

static

c)

stationary

d)

quasi-stationary

e)

electromagnetic

24.

Which mode covers ray processes of geometric optics?

a)

quasi-optical

b)

static

c)

stationary

d)

electromagnetic

e)

electrodynamic

25.

What are the limits of the waveguide radius, depending on the type of waves used in circular cross-section metallic waveguides for the critical wavelength?

a)

from 1.5 to 3.4

b)

from 2 to 5

c)

from 1 to 2

d)

from 2.5 to 4.5

e)

from 4.5 to 7.5

26.

What parameters characterize the quality of transmission in linear communication circuits and their electrical properties?

a)

primary

b)

secondary

c)

dispersion

d)

tertiary

e)

critical frequency

27.

To which parameters of the line do inductance, capacitance, resistance, and insulation conductivity belong?

a)

primary

b)

secondary

c)

wave

d)

effective

e)

indirect

28.

What parameters of the line do inductance, capacitance, resistance, and insulation conductivity relate to?

a)

primary

b)

secondary

c)

wave

d)

effective

e)

indirect

29.

What is the difference between OKS and electrical cables?

a)

attenuation depends on internal and external mechanical conditions

b)

inductance depends on internal and external mechanical conditions

c)

capacitance depends on internal and external mechanical conditions

d)

resistance depends on internal and external mechanical conditions

e)

conductivity depends on internal and external mechanical conditions

30.

What thickness of coating is applied to the fibers of OKS immediately after drawing, in the case of a two-layer coating?

a)

5 - 10 microns

b)

6 - 12 microns

c)

7 - 14 microns

d)

8 - 16 microns

e)

9 - 18 microns

31.

What coating provides better stability of losses during transverse compression of OKS fibers, as well as reduces losses at low temperatures?

a)

three-layer

b)

two-layer

c)

four-layer

d)

five-layer

e)

six-layer

32.

In which variant of structural solutions for laying optical fiber cables are the fibers not bonded to each other and to the sheath?

a)

free

b)

bonded

c)

surface

d)

pneumatic

e)

transmitting

33.

What are the disadvantages of fiber optic cables?

a)

complexity in application

b)

influence of electromagnetic interference

c)

data transmission over long distances

d)

cable laying as trunk networks

e)

simple cable design

34.

What is the length of the segment of VOK used for laying trunk networks?

a)

2.2 km

b)

3 km

c)

4 km

d)

4.3 km

e)

5.2 km

35.

Where does light amplification occur using stimulated emission of energy?

a)

in lasers

b)

in photodetectors

c)

in glass fiber

d)

in spotlight

e)

in LED

36.

Where does radiation occur spontaneously, and the beam has lower power and wide radiation directionality?

a)

in LED

b)

in photodetectors

c)

in glass fiber

d)

in spotlight

e)

in lasers

37.

What is the width of the frequency range used in OV communication lines?

a)

10^14 Hz

b)

10^4 Hz

c)

10^12 Hz

d)

10^6 Hz

e)

10^16 Hz

38.

What is the diameter of the OV sheath?

a)

125 microns

b)

50 microns

c)

8 microns

d)

250 microns

e)

150 microns

39.

What is the diameter of the core of multimode OV?

a)

50 microns

b)

125 microns

c)

8 microns

d)

250 microns

e)

150 microns

40.

What is the diameter of the core of single-mode OV?

a)

7-10 microns

b)

50 microns

c)

125 microns

d)

150 microns

e)

250 microns

41.

What profile of refraction is characterized by a sharp change in the refractive index at the boundary?

a)

step

b)

gradient

c)

smooth

d)

solid

e)

round

42.

What profile of refraction is characterized by a smooth change in the refractive index at the boundary?

a)

gradient

b)

step

c)

solid

d)

round

e)

square

43.

What is the name of

4 lines
44.

What is characterized by a smooth change in the refractive index at the boundary?

a)

gradient

b)

step

c)

continuous

d)

round

e)

square

45.

What is the loss called, where the transformation of light energy into thermal energy occurs?

a)

absorption

b)

scattering

c)

bending

d)

dispersion

e)

damping

46.

What is the process called that is reduced to the generation of secondary waves by molecules or particles under the influence of incident light?

a)

scattering losses

b)

absorption losses

c)

bending losses

d)

dispersion

e)

damping

47.

What dispersion is caused by the presence of several modes?

a)

modal

b)

waveguide

c)

material

d)

polarization

e)

chromatic

48.

What dispersion is related to the nonlinear dependence?

a)

material

b)

modal

c)

waveguide

d)

polarization

e)

chromatic

49.

What is called after passing through a dispersive medium?

a)

dispersion

b)

damping

c)

normalized frequency

d)

phase velocity

e)

numerical aperture

50.

What is called?

a)

waveguide

b)

cord

c)

feeder

d)

cable

e)

chain

51.

What waveguide is designed for feeder lines of stationary radio devices, radio relay, tropospheric, and radar stations?

a)

oval corrugated

b)

elliptical corrugated from copper annealed tape

c)

elliptical corrugated

d)

acoustic

e)

rectangular

52.

What waveguides are designed for feeder lines of stationary radio relay communication lines?

a)

elliptical corrugated from copper annealed tape

b)

oval corrugated

c)

elliptical corrugated

d)

acoustic

e)

rectangular

53.

What waveguide is designed for feeder lines?

a)

elliptical corrugated

b)

elliptical corrugated from copper annealed tape

c)

oval corrugated

d)

acoustic

e)

rectangular

54.

What is the space called in which sound waves propagate near a layer with minimal temperature?

a)

acoustic waveguide channel

b)

rectangular waveguide channel

c)

direct channel

d)

round channel

e)

communication channel

55.

What waveguide is a dielectric structure through which electromagnetic energy can propagate in the visible and infrared regions of the spectrum?

a)

optical

b)

rectangular

c)

round

d)

elliptical

e)

oval

56.

What is the model of influences between two homogeneous, consistently loaded circuits called?

a)

model of direct influences

b)

model of indirect influences

c)

model of electrical influences

d)

model of equivalent influences

e)

model of magnetic influences

57.

What is the name of the model of influence through third circuits, i.e., neighboring circuits, screens, cable shells?

a)

Indirect influence model

b)

Direct influence model

c)

Electrical influence model

d)

Equivalent influence model

e)

Magnetic influence model

58.

What is the logarithmic measure of the ratio of the total signal power to the total noise power at the same point in the circuit called?

a)

Security

b)

Transitional attenuation

c)

Useful signal

d)

Self-attenuation

e)

Critical frequency

59.

What is the influence caused by the action of the electric field called?

a)

Electric

b)

Magnetic

c)

Direct

d)

Indirect

e)

Equivalent

60.

What is the influence caused by the action of the magnetic field called?

a)

Magnetic

b)

Electric

c)

Direct

d)

Indirect

e)

Equivalent

61.

What influences occur in the case of ideal (calculated) symmetry of the considered groups of circuits?

a)

Regular

b)

Irregular

c)

Systematic

d)

Direct

e)

Indirect

62.

What influences are caused by deviations of constructions from ideally symmetrical and inhomogeneities of circuits?

a)

Irregular

b)

Regular

c)

Systematic

d)

Direct

e)

Indirect

63.

What influences are caused by electromagnetic connections that are constant in magnitude and phase?

a)

Systematic

b)

Irregular

c)

Regular

d)

Direct

e)

Indirect

64.

What influences arise due to the mismatch of input resistances of equipment with the wave resistance of the line, resulting in reflected waves?

a)

Influences due to reflections

b)

Influences due to constructive inhomogeneities

c)

Influences due to third circuits

d)

Influences due to directness

e)

Influences due to regularity

65.

What influences arise due to the irregularity of the construction of cable and overhead lines in length?

a)

Influences due to constructive inhomogeneities

b)

Influences due to reflections

c)

Influences due to third circuits

d)

Influences due to directness

e)

Influences due to regularity

66.

What are the inhomogeneities in cable lines within construction lengths called?

a)

Internal

b)

Joint

c)

Elemental

d)

Profile

e)

Constructive

67.

What are the inhomogeneities at the junctions of construction lengths called?

a)

Joint

b)

Internal

c)

Elemental

d)

Profile

e)

Constructive

68.

What inhomogeneities on overhead lines are associated with differences in the elements of crossing by length, related to deviations in the placement of supports?

a)

Elemental

b)

Joint

c)

Internal

d)

Profile

e)

Constructive

69.

What inhomogeneities are caused by differences in the sag of wires and unequal distances between pins on the traverses?

(a)  

70.

What irregularities are caused by the difference in the sag of wires and the unequal distance between the pins on the traverses?

a)

profile

b)

joint

c)

elementary

d)

internal

e)

constructive

71.

What is the cause of additional influences on overhead and cable lines?

a)

third circuits

b)

construction of irregularities

c)

reflection of irregularities

d)

systematic influences

e)

regular influences

72.

In which lines was the root mean square law of summation of interference used from individual construction lengths and absolute values of interference currents were taken without considering phase relationships?

a)

cable

b)

overhead

c)

optical

d)

waveguide

e)

autoblocking

73.

In which lines were interferences summed taking into account phase relationships?

a)

overhead

b)

cable

c)

optical

d)

waveguide

e)

autoblocking

74.

What are the interferences caused by the fractional effect of lamps and chaotic thermal motion of electrons in transistors and cable conductors called?

a)

thermal

b)

nonlinear noise

c)

linear transitions

d)

electrical

e)

mechanical

75.

What are the interferences arising from the nonlinear characteristics of equipment and devices of the group tract called?

a)

nonlinear noise

b)

thermal

c)

linear transitions

d)

electrical

e)

mechanical

76.

What are the interferences caused by electromagnetic influence between communication circuits called?

a)

linear transitions

b)

thermal

c)

nonlinear noise

d)

electrical

e)

mechanical

77.

What is the effect called if the wave propagation coefficients of interacting circuits are unequal, then the magnitude of the influence of the first circuit on the second differs from the magnitude of the influence of the second circuit on the first?

a)

permutation effect

b)

proximity effect

c)

due to reflections

d)

due to irregularities

e)

range effect

78.

What is performed on overhead lines to protect against electromagnetic influence during construction?

a)

crossing

b)

twisting

c)

screening

d)

symmetrization

e)

protection along the length of the section

79.

What do industrial enterprises carry out in the process of cable manufacturing?

a)

twisting circuits into groups and twists

b)

crossing

c)

screening

d)

symmetrization

e)

protection along the length of the section

80.

What is produced at the factory by applying thin metal shells to individual cable groups or the overall cable twist?

a)

screening

b)

twisting

c)

crossing

d)

symmetrization

e)

protection along the length of the section

81.

What is performed during the installation and construction of the cable line?

a)

symmetrization

b)

twisting

c)

screening

d)

crossing

e)

protection along the length of the section

82.

When crossing, what is the odd number of sections that remains uncompensated called?

a)

unbalanced length

b)

third circuit

c)

mutual influence

d)

ko

83.

What is the odd number of sections that remains uncompensated during crossing?

a)

unbalanced length

b)

third chain

c)

mutual influence

d)

indirect influence

e)

immediate influence

84.

What is the actual crossing of wires carried out on communication lines called?

a)

physical

b)

electrical

c)

magnetic

d)

electromagnetic

e)

cyclic

85.

What is the process of natural crossing due to phase change of current in the circuit called?

a)

electrical crossing

b)

physical crossing

c)

magnetic crossing

d)

electromagnetic crossing

e)

cyclic crossing

86.

What is the phenomenon of energy absorption by a neighboring circuit called?

a)

absorption

b)

cycle

c)

schematic

d)

effective

e)

asymmetry

87.

What is determined between circuits by non-coinciding crossings or non-coinciding crossing indices?

a)

mutual protection

b)

indirect protection

c)

immediate protection

d)

electrical protection

e)

magnetic protection

88.

What is the length of the section on which the wires of the group make a complete turn around the twisting axis called?

a)

twist step

b)

twist cycle

c)

twist section

d)

twist index

e)

twist scheme

89.

What is the symmetrization that involves compensating for electromagnetic connections between circuits at one section of the cable line with connections from another section called?

a)

symmetric crossing of wires

b)

capacitor method

c)

concentration of symmetrization with counter connections

d)

symmetrization of pair crossing

e)

symmetrization of capacity crossing

90.

Cable circuit twisting is performed to…

a)

reduce mutual and external influences

b)

increase cable flexibility

c)

increase mutual influences between circuits

d)

reduce cable attenuation

e)

increase attenuation

91.

What are the voltages and currents called that cause interference, noise, and distortions leading to disruption of normal operation of communication means?

a)

interfering

b)

dangerous

c)

external

d)

indirect

e)

immediate

92.

What is the mode called when the line operates continuously?

a)

normal

b)

forced

c)

emergency

d)

cyclic

e)

periodic

93.

What is the mode called when?

a)

forced

b)

normal

c)

emergency

d)

cyclic

e)

periodic

94.

What is called?

a)

emergency

b)

normal

c)

forced

d)

cyclic

e)

periodic

95.

What do you call a device designed to connect grounding protection devices (lightning rods, surge protectors) as well as metal parts of power equipment to the ground?

a)

protective grounding

b)

working grounding

c)

linear-protective grounding

d)

dangerous grounding

e)

interfering grounding

96.

What do you call devices for grounding metal shells and screens of cables?

4 lines
97.

What do you call devices for grounding metal shells and screens of cables?

a)

linear protective grounding

b)

working grounding

c)

protective grounding

d)

dangerous grounding

e)

interfering grounding

98.

What is the relationship of the ground potential to the current flowing from it called?

a)

ground resistance

b)

ground inductance

c)

ground capacitance

d)

ground conductivity

e)

ground attenuation

99.

What measurement method can determine the distance to the break in the wires?

a)

measuring resistance

b)

measuring capacitance

c)

measuring insulation conductivity

d)

measuring inductance

e)

all of the above

100.

What do you call the coefficients of shielding calculated at zero grounding resistances?

a)

ideal

b)

real

c)

intermediate

d)

point

e)

chain

101.

What do you call the currents that wires are subjected to not only from external unbalanced electromagnetic fields but also from galvanic influences of currents in the ground?

a)

stray

b)

ideal

c)

real

d)

protective

e)

instrumental

102.

What do you call a section of the LS circuit that does not contain transformers, amplifiers, or filters?

a)

galvanically unseparated

b)

magnetic

c)

electric

d)

air

e)

conductive

103.

What are the conditions for laying the ZKPK cable?

a)

in cable channels, pipes, blocks, over bridges, in soils of all categories (in the absence of mechanical impacts), across rivers, marshy areas

b)

in mines, in unstable soils

c)

in soils of not all categories, with the danger of damage by rodents

d)

non-fused rivers, swamps 5 meters deep

e)

no correct answer

104.

What material are the conductors of a symmetrical cable made of?

a)

copper

b)

plastic

c)

aluminum

d)

cord

e)

no correct answer

105.

The process of electromagnetic energy propagation along a circuit is determined by which formula?

a)

Ux = U0 * e^(-γx)

b)

K = g + iwk

c)

M = g + iwm

d)

S = ω / β

e)

no correct answer

106.

What are the purposes of crossing wires in VLS?

a)

to reduce mutual influence between circuits

b)

to increase the strength of the structure

c)

for convenience of suspension on insulators

d)

to increase channels

e)

no correct answer

107.

What is the critical frequency (fкр)?

a)

the minimum frequency at which wave propagation is possible

b)

waveguide

c)

superconducting cable

d)

asymmetrical cable

e)

no correct answer

108.

A heterogeneous medium has a structure (copper-dielectric).

a)

copper tracks on a dielectric base

b)

coaxial cable

c)

waveguide

d)

symmetrical cable

e)

no correct answer

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