RCDD Chapter 5
This is for Chapter 05.
- 1.
A backbone star topology should have no more than _____________levels of cross-connection?
- A.
3
- B.
2
- C.
1
- D.
4
- E.
5
Correct Answer
B. 2 -
- 2.
Connections between any two HCs (FDs) shoud not pass through more than ________cross-connections?
- A.
1
- B.
3
- C.
4
- D.
2
- E.
5
Correct Answer
B. 3 -
- 3.
To allow direct connections between TRs the system is expected to meet the requirements for a _____________topology or ________________topology configuration?
- A.
BUS
- B.
STAR
- C.
RING
- D.
HIERARCHICAL STAR
Correct Answer(s)
A. BUS
C. RING -
- 4.
A design for a one-level hierarchical star campus backbone would link all the buildings to the?
- A.
ICs (BD)
- B.
HCs (FD)
- C.
MC (CD)
Correct Answer
C. MC (CD) -
- 5.
Connecting the outlying buidings in a physical ring are highly recommended?
- A.
True
- B.
False
Correct Answer
B. False -
- 6.
The typical design for a conduit system that provides physical ring topology would dedicate some of the optical fibers to a ________ and some of the optical fibers to a __________?
- A.
Ring,Star
- B.
Bus,Ring
- C.
Bus,Star
- D.
Hierarchical star, Ring
Correct Answer
A. Ring,Star -
- 7.
A TR is an enclosed architectural space for housing what?
- A.
Telecommunications equipment
- B.
Printers
- C.
Cable terminations
- D.
Generators
- E.
Cross-connect cabling
Correct Answer(s)
A. Telecommunications equipment
C. Cable terminations
E. Cross-connect cabling -
- 8.
A TE is a case or housing for telecommunications equipment, cable terminations, and cross-connect cabling.
- A.
True
- B.
False
Correct Answer
A. True -
- 9.
A TR or TE is the point where the backbone cabing interfaces to what?
- A.
Equipment cord
- B.
Patch cord
- C.
Cross-connections
- D.
Telecommunication outlet connectors
- E.
Horizontal cabling
Correct Answer
E. Horizontal cabling -
- 10.
In multistory buildings you ________ vertically align TRs whenever possible?
- A.
Shouldn't
- B.
Should
Correct Answer
B. Should -
- 11.
The length of the equipment cable used to connect telecommunications equipment directly to the MC (CD) or IC (BD) should not exceed what?
- A.
90m (295 ft)
- B.
30m (98ft)
- C.
5m (16ft)
- D.
10m (33ft)
Correct Answer
B. 30m (98ft) -
- 12.
The recommended cable types for backbone systems are?
- A.
65 ohm coaxial
- B.
100 ohm balanced twisted-pair
- C.
Simglemode optical fiber
- D.
62.5/125 and 50/125 um multimode optical fiber.
- E.
75 ohm coaxial
Correct Answer(s)
B. 100 ohm balanced twisted-pair
C. Simglemode optical fiber
D. 62.5/125 and 50/125 um multimode optical fiber.
E. 75 ohm coaxial -
- 13.
OS1 fiber classification is what type of optical fiber?
- A.
62.5/125 um Multimode
- B.
50/125 um 850nm laser
- C.
50/125 um Multimode
- D.
Singlemode
Correct Answer
D. Singlemode -
- 14.
The appliction Token Ring 16 Mb/s uses a Specification Reference of what and was created when?
- A.
ISO/IEC 8802-3 2000
- B.
ISO/IEC FCD 9314-10 1994
- C.
AnSI/TIA/EIA-854 2001
- D.
ISO/IEC 8802-5 1998
Correct Answer
D. ISO/IEC 8802-5 1998 -
- 15.
When choosing transmission media what factors should you consider?
- A.
Flexibility of the medium with respect to supported services
- B.
Required useful life of backbone cabling
- C.
Site size and user population
- D.
All the above
Correct Answer
D. All the above -
- 16.
What are the backbone lengths and Data rates for Campus backbone (OM1 fiber)
- A.
550m (1804 ft) 1 Gb/s
- B.
300 m (984 ft) 1 Gb/s
- C.
2 km (1.2 mi) 155 Mb/s
- D.
300 m (984 ft) 10 Gb/s
- E.
2000 m (6560 ft) 10 Gb/s
Correct Answer
C. 2 km (1.2 mi) 155 Mb/s -
- 17.
What are the backbone lingths and data rates for Campus backbones (OM2 fiber)
- A.
2000 m (6560 ft) 10 Gb/s
- B.
2 km (1.2 mi) 155 Mb/s
- C.
300 m (984 ft) 1 Gb/s
- D.
550m (1804 ft) 1 Gb/s
- E.
300 m (984 ft) 10 Gb/s
Correct Answer
D. 550m (1804 ft) 1 Gb/s -
- 18.
What is the backbone length and data rate for Building backbone (OM2 fiber)
- A.
550m (1804 ft) 1 Gb/s
- B.
2 km (1.2 mi) 155 Mb/s
- C.
2000 m (6560 ft) 10 Gb/s
- D.
300 m (984 ft) 1 Gb/s
- E.
300 m (984 ft) 10 Gb/s
Correct Answer
D. 300 m (984 ft) 1 Gb/s -
- 19.
What is the backbone length and data rate for building backbone (OM3 fiber)
- A.
550m (1804 ft) 1 Gb/s
- B.
300 m (984 ft) 10 Gb/s
- C.
2000 m (6560 ft) 10 Gb/s
- D.
300 m (984 ft) 1 Gb/s
- E.
2 km (1.2 mi) 155 Mb/s
Correct Answer
B. 300 m (984 ft) 10 Gb/s -
- 20.
What is the backbone length and data rate for campus/building backbone (OS1 fiber)
- A.
2 km (1.2 mi) 155 Mb/s
- B.
2000 m (6560 ft) 10 Gb/s
- C.
300 m (984 ft) 1 Gb/s
- D.
550m (1804 ft) 1 Gb/s
- E.
300 m (984 ft) 10 Gb/s
Correct Answer
B. 2000 m (6560 ft) 10 Gb/s -
- 21.
The two recommended optical multimode fiber cables are graded-index optical fiber with a nominal 62.5/125 um or 50/125 um core/cladding diameter.
- A.
True
- B.
False
Correct Answer
A. True -
- 22.
Singlemode fiber cable has a zero-dispersion wavelength around what?
- A.
1300
- B.
1310
- C.
500
- D.
1315
Correct Answer
B. 1310 -
- 23.
The recommended balanced twisted-pair cable for building backbone cosists of 24 AWG (0.51 mm .020 in) or up to 22 AWG (.64 mm .025in) round, solid copper conductors with a nominal characteristic impedance of 100 ohm. Additionally, for campus backbone what other 2 cables are recognized?
- A.
19 AWG .91 mm .036 in
- B.
16 AWG .86 mm .028
- C.
26 AWG .41 mm .016
- D.
28 AWG .1.58 mm .048
Correct Answer(s)
A. 19 AWG .91 mm .036 in
C. 26 AWG .41 mm .016 -
- 24.
For a multipair backbone balanced twisted-pair cable what is the Category and Class of the cable when it is specified up to 16 megahertz?
- A.
Category 6/Class E
- B.
Category 5e/Class D
- C.
Category 3/Class C
- D.
Category 7/Class F
Correct Answer
C. Category 3/Class C -
- 25.
What is the Class and Category of a cable specified up to 100 MHz
- A.
Category 7/Class F
- B.
Category 3/Class C
- C.
Category 6/Class E
- D.
Category 5e/Class D
Correct Answer
D. Category 5e/Class D -
- 26.
What is the Backbone cable length for voice systems?
- A.
800m (2625ft)
- B.
100m (328ft)
- C.
90m (295ft)
- D.
900m (2954ft)
- E.
850m (2788ft)
Correct Answer
A. 800m (2625ft) -
- 27.
Vertically aligned TRs with connecting sleeves or slots are the most common type of backbone pathway.
- A.
True
- B.
False
Correct Answer
A. True -
- 28.
The advantage of using vertically aligned TRs is flexibility. What two things give it its flexibility?
- A.
Cost effective
- B.
Circuits can be distributed as required
- C.
Backbone cable sheath is accessible on each floor
- D.
Adds moves and changes are made easier
Correct Answer(s)
B. Circuits can be distributed as required
C. Backbone cable sheath is accessible on each floor -
- 29.
Where should you position cable sleeves or slots?
- A.
In the corner of the room
- B.
On the left hand side
- C.
Adjacent to a wall on which the backbone cables can be supported
- D.
Next to equipment racks
Correct Answer
C. Adjacent to a wall on which the backbone cables can be supported -
- 30.
Sleeves or slots must not obstruct wall-terminationg space.
- A.
True
- B.
False
Correct Answer
A. True -
- 31.
Slots should have a minimum _____________high curb?
- A.
25mm (1in)
- B.
50mm (2in)
- C.
75mm (3in)
- D.
100mm (4in)
Correct Answer
A. 25mm (1in) -
- 32.
Sleeves should extend a minimum of ___________ above the floor level?
- A.
75mm (3in)
- B.
50mm (2in)
- C.
25mm (1in)
- D.
100mm (4in)
Correct Answer
C. 25mm (1in) -
- 33.
The quantity of pathways using 100 mm (4 trade size) conduits or sleeves should be four sleeves or conduits plus on additional sleever or conduit per what?
- A.
1000 m sq (1000ft sp)
- B.
4000m sq (4000ft sq)
- C.
3000m sq (3000ft sq)
- D.
2000m sq (2000ft sq)
Correct Answer
B. 4000m sq (4000ft sq) -
- 34.
When the number of sleeves or the area of the pathway requires more than one row of sleeves, the designers should restrict the number of rows to ________whereever practicable?
- A.
Three
- B.
Four
- C.
Two
- D.
One
Correct Answer
C. Two -
- 35.
Slots are typically located flush against the wall within a space, and shoud be designed at a depth (the demension perpendicular to the wall) of what?
- A.
200-800 mm (8-32in)
- B.
152-610 mm (6-24 in)
- C.
100-200 mm (4-8in)
- D.
172-610 mm (7-24in)
Correct Answer
B. 152-610 mm (6-24 in) -
- 36.
The size of the pathway using slots should be one slot sized at ________for up to _____________ of usable floor space served by that backbone system?
- A.
.46 m sq (60 in sq)/4000m sq (40000 ft sq)
- B.
.56 m sq (70 in sq)/5000m sq (50000 ft sq)
- C.
.26 m sq (30 in sq)/2000m sq (20000 ft sq)
- D.
.36 m sq (40 in sq)/3000 m sq (30000 ft sq)
Correct Answer
A. .46 m sq (60 in sq)/4000m sq (40000 ft sq) -
- 37.
The location and configuration of hte slots shall be approved by a structural engineer.
- A.
True
- B.
False
Correct Answer
A. True -
- 38.
The slot area should be increased by .46m sq (60ft sq) with each 4000 m sq (40000 ft sq) increase in usable floor space served by that backbone.
- A.
True
- B.
False
Correct Answer
A. True -
- 39.
Open cable shafts are used when available and where large quantities of cables are required on a floor that is distant from the ___
- A.
TR
- B.
ER
- C.
MC (IC)
- D.
TE
Correct Answer
B. ER -
- 40.
When necessary you my place backbone cable pathways in elevator shafts.
- A.
True
- B.
False
Correct Answer
B. False -
- 41.
Electrical metallic tubing conduit fill for backbone cable on 1 cable is what percent fill?
- A.
53%
- B.
54%
- C.
35%
- D.
52%
Correct Answer
A. 53% -
- 42.
Electrical metallic tubing conduit fill for backbone cabling on 2 cables is what percent fill?
- A.
53%
- B.
54%
- C.
24%
- D.
31%
- E.
32%
Correct Answer
D. 31% -
- 43.
The number of cables that can be installed in a condit can be limited by the allowed maximum pullin tension of the cables.
- A.
True
- B.
False
Correct Answer
A. True -
- 44.
Heavy cable that is improperly supported can cause what?
- A.
Broken optical fibers
- B.
Stretching of copper conductors
- C.
Slippage between the cable pairs and the sheath
- D.
All the above
Correct Answer
D. All the above -
- 45.
Where large, heavy, balanced twisted-pair backbone cables are used (1200 -pair copper), clamp the cable to a ________ suspended between the highest floor of the building and the basement.
- A.
Conduit
- B.
Ladder rack
- C.
Support strand
- D.
Equipment rack
Correct Answer
C. Support strand -
- 46.
Steel strands used for supporting riser cables are available in verious sizes ranging from ?
- A.
2.4 mm ( .10 in ) to 22 mm (.87 in)
- B.
6.3 mm (.25 in ) to 32 mm (1.3 in)
- C.
6.3 mm (.25in) to 22 mm (.87 in)
Correct Answer
C. 6.3 mm (.25in) to 22 mm (.87 in) -
- 47.
You should place ties approximately 1 m (3.28ft ) apart with a minimum of three ties per floor.
- A.
True
- B.
False
Correct Answer
A. True -
- 48.
Insert cable ties (usually 1.25 mm (.049 in) steel) to secure backbone cable through the layers fo the strand before overall strand tensioning.
- A.
True
- B.
False
Correct Answer
A. True -
- 49.
Fiber cables are categorized by what?
- A.
Tight buffered
- B.
Campus backbone
- C.
Buffering mechansim
- D.
Function
- E.
Horizontal distribution
Correct Answer(s)
C. Buffering mechansim
D. Function -
- 50.
What are the two types of buffering mechanisms for optical fiber cable?
- A.
Tight buffered (indoors 900um)
- B.
Tight tube (indoors 900um)
- C.
Loose Tube (Outdoors 250um)
- D.
Loose buffered (indoors 250um)
Correct Answer(s)
A. Tight buffered (indoors 900um)
C. Loose Tube (Outdoors 250um) -
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