BICSI Registered Communications Distribution Designer RCDD-002 Test Questions

1. A video camera has a coaxial cable output. The video signal is to be distributed to devices that have balanced twisted pair inputs.

The transition between these two different transmission media can be accomplished by using a:

2. Which is an advantage of stranded conductors over solid conductors?

3. You must place a cable between 2 equipment locations with separate grounds having a potential difference between them of 2.1 V rms.

Which one of the following cables should NOT be used?

4. You must place CAT6 cable above a factory floor with automated welding machines and hammer forges.

Of the following, what type of shielding would be most effective?

5. Two sinusoidal signals have the same amplitude (A) and the same frequency (f). They differ in phase by 180 degrees.

If these two signals are added together, the result is a sinusoidal signal having an amplitude of:

6. Time division multiplexing (TDM) systems are designed to transport ________ between end point systems.

7. Which of the following correctly lists the lowest frequency band to the highest frequency band?

8. A SONET OC-1 channel can carry 672 voice signals and has a data rate of 51.84 Mbps. A SONET OC-48 channel can carry 32,256 voice channels.

What MINIMUM data rate is required for the OC-48 channel?

9. Optical transmitters are typically one of the following types EXCEPT:

10. Assume that the optical power transmitted by a 62.5/125 multimode fiber is distributed uniformly across its core.

If this fiber is perfectly coupled (i.e., the two fibers are aligned and abutted) to a 50/125 fiber, what is the percent of power that is lost?

11. Wave division multiplexing (WDM) is most similar to:

12. Which characteristic is an advantage of copper based media over optical fiber cable?

13. The public telephone system is an example of a __________ system.

14. Composite conductors, although not generally recommended, may be used in special circumstances because they provide all of the following advantages EXCEPT:

15. A reasonable approximation for the signal speed in 100 ohm balanced twisted pair cable is__________, where c is the velocity of light in free space.

16. The signal at the input to a balanced twisted pair cable is 10 mW. The cable is 1000 feet long and has an attenuation of 1 dB per 100 feet. This cable is connected to the input of a receiver. The noise level at the input to the receiver is 1 microwatt.

What is the signal-to-noise ratio (SNR) (dB) at the receiver input?

17. If the input signal power to a communication system is 1 W and the output power is 1 mW, the system attenuation is:

18. Which electrical characteristic is displayed with the correct preferred value?

19. All of the following are nominal wavelengths for laser light sources EXCEPT:

20. The conversion of an analog speech signal to a pulse code modulation (PCM) digital signal involves all of the following steps EXCEPT:

21. During a site survey you notice that several CRT displays in the vicinity of the engineering copy center have sporadic visual distortion.

What is the MOST likely cause?

22. You are placing Category 6 unshielded twisted-pair (UTP) in cable tray down a hallway past the elevator mechanical room.

What action should you take to avoid effects of electromagnetic interference (EMI)?

23. The electromagnetic spectrum of visible light lies in the ___________ frequency range of

the spectrum.

24. You are required by architectural design to place UTP cables in the same space as unshielded power lines.

How should you proceed with the placement of your cables?

25. The ability of a device to withstand electromagnetic disturbances from another device is:

26. Which of the following is an undesirable electromagnetic effect on a device(s)?

27. You have discovered a common mode current on the metallic cable sheaths of your building riser cables.

What is the MOST likely cause for you to investigate?

28. Which of the following is NOT a form of signal coupling between two (2) circuits?

29. A common mode (CM) signal can be converted to a differential mode (DM) signal as a result of a(n):

30. What is the recommended MINIMUM separation of unshielded twisted-pair (UTP) cables from fluorescent light fixtures?

31. Which of the following is NOT a source of electromagnetic interference (EMI)?

32. The potential for ______ occurs when devices or systems share a common electromagnetic environment and their operational frequencies overlap.

33. What is the International Organization for Standardization/International Electrotechnical Commission ISO/IEC class rating for American National Standards Institute/Telecommunication Industry Association (ANSI/TIA) Category 5e cable?

34. What is the connector of choice for Series 59, Series 6, and Series 11 applications?

35. What is the insertion loss guideline for a multimode mechanical splice?

36. What is the testing frequency of a Category 6/Class E cable?

37. What type of optical fiber is used primarily for outside plant (OSP) applications?

38. If looking to specify an optical fiber backbone within a building going 275 m (902 ft) between the equipment room (ER) and the telecommunications room (TR), what type of fiber should be specified to support a 10 GB ethernet application?

39. What is the frequency rating of an International Organization for Standardization/International Electrotechnical Commission (ISO/IEC) Category 7/Class F cable?

40. Which of the following is NOT a design consideration for broadband video distribution?

41. The RJ-45 is now known as the 8P8C style connector, per the Telecommunications Industry Association (TIA) standard.

What does the P and C stand for?

42. What type of fiber optic cable is manufactured to protect individual glass strands and is primarily designed for use inside buildings?

43. You must extend a video systems backbone coax cable that was recently installed.

Which of the following coaxial cable types would provide the best performance for both analog and digital video?

44. Which of the following is true about screened twisted pair cable assemblies?

45. This type of cable is an unbalanced system:

46. There are three buildings approximately 400 meters apart and the customer wants to use 10 Gig Ethernet.

What fiber should be specified for this application?

47. The ability of a conductors insulation to transmit an electric field is called:

48. You are extending 1000 MHz video service from your existing headend to a new equipment room (ER). Your existing incoming video signal is plus (+) 15 dBmV. You have three two- way splitters with a total of minus (-) 15 dB. You are adding 122 m (400 ft) of series 11 (RG 11) cable with a minus (-) 18 dB with eight single end F-connectors with a total of minus (-) 1.2 dB.

From the selections below, what is the MINIMUM gain amplifier required in the headend room?

49. When specifying telecommunications outlet boxes, all of the following should be considered EXCEPT:

50. The MINIMUM separation distance between grounded metal telecommunications pathway and unshielded power lines is:

51. Which of the following is NOT an example of a perimeter pathway?

52. A telecommunications outlet/connector may be provided using all listed below EXCEPT:

53. A furniture cluster with 26 requires a MINIMUM of how many multiuser telecommunications outlet assembly (MUTOA)?

54. An open office design is made up of three furniture clusters and contains a total of nine.

How many multiuser telecommunications outlet assemblies (MUTOA) should be in the design?

55. Which of the following is NOT true about consolidation points?

56. Which of the following is NOT a type of connector for optical fiber?

57. On a project with three small conference rooms, a break room, and twelve private offices, what is the MINIMUM number of telecommunications outlet boxes required?

58. Assuming the total fill capacity of a pathway is 100 cables (all of the same cable type and size), the MAXIMUM number of cables to be installed during the initial installation, without exceeding the fill ratio is:

59. In a run requiring 15 m (50 ft) of cable between the floor distributor and the consolidation point, the MAXIMUM length of cable allowed between the CP and the telecommunications outlet is:

60. When installing outlet boxes in ten private offices in an area which may prove to be difficult to install future additional telecommunications outlets, the MINIMUM quantity of outlet boxes that should be installed is:

61. Important considerations when designing telecommunications distribution within modular furniture include all of the following EXCEPT:

62. The MINIMUM finished height of access flooring in a general office area is:

63. Cables are installed in a ceiling in a straight line. The ceiling run is 60 m (200 ft) in length.

What is the MINIMUM number of J-hooks required to support the cables?

64. In the ceiling zone method of distribution, the usable floor area should be divided into zones each measuring:

65. You are designing a horizontal distribution system that will have a zone box located 71.6 m (235 ft) away from the telecommunications room (TR). A 50 mm (2 in) conduit is designed from the TR to a pull box located 36.6 m (120 ft) away from the TR. A 1 1/2 inch conduit is designed from the pull box to the zone box located 35.1 m (115 ft) beyond the pull box.

Assuming no conduit bends, and excluding the TR and zone box, what is the total number of pull boxes/pull points required in this horizontal conduit system between the telecommunications room (TR) and zone box?

66. Which of the following is true when describing slip sleeves or gutters?

67. An existing ceiling raceway system has 115,000 sq mm (177 sq in) of cross-sectional area available for distribution of cable runs.

How many can be served by the existing system?

68. You are designing a horizontal pathway system where you will provide 100 mm (4 in) conduit and pull boxes. The building architectural elements will only allow for a single layer of conduits (not stacked). The main horizontal pathway system consists of five 100 mm (4 in) conduits. Large single sheath copper cables are not expected to be placed.

Which of the following is the MINIMUM width pull box that is to be provided?

69. Which type of cable tray is best described as a ventilated bottom with side rails?

70. Which of the following is NOT an advantage of access floor systems?

71. From a 1000 ft (305 m) roll of optical fiber, how many MAXIMUM length centralized optical fiber cabling runs can be made?

72. When placing an optical fiber cable in the horizontal optical fiber cabling subsystem, what is the MAXIMUM number of splices that can be used?

73. The standard floor space coverage area for each building automation system (BAS) is a BAS outlet or device for every ________ of floor space.

74. Using the "pathway design" for horizontal cable distribution, how many cable runs are placed to serve 15 individual?

75. Which of the following is NOT considered acceptable in an information technology system (ITS) conduit design and installation?

76. The standard floor space coverage area for each building automation system (BAS), is a BAS outlet or device for every_______ of floor space.

77. A conduit run is installed from the ER to a TR. It has two (2) 90 degree bend and a length of 20 m (65 ft).

What will be the MINIMUM test rating of the pull cord left in the conduit?

78. Perimeter raceway systems should be used primarily for:

79. When designing a backbone distribution system, you will need to include a telecommunications enclosure (TE). A TE can be defined as a:

80. When installing a heavy backbone cabling vertically, recommended methods of securing the cable include all of the following EXCEPT:

81. A backbone star topology shall have no more than______ level(s) of cross-connections.

82. Rack mounted hardware is installed in two standard sized racks or cabinets. Those sizes are:

83. Exhibit:

This diagram illustrates an example of a:

84. One of the advantages of using optical fiber in the backbone installation is:

85. When designing a backbone distribution system, you are asked to include a combination of media types.

Your choice of media types include:

86. An installation crew is pulling an optical fiber cable into a riser. The cable has an outside diameter of 25 mm (1 in). As the cable is being pulled off the reel and through a pulley into the riser, you must verify that the minimum bend radius for the cable being pulled is observed.

The pulley must be sized at a MINIMUM of:

87. Exhibit:

This diagram illustrates a ______________campus backbone design.

88. In the customer’s environment, an ITS designer should avoid the need for optical fiber field splicing by:

89. When designing a fiber backbone using cable with an armored sheath, a major consideration that you must address is:

90. You are reviewing a building backbone design with a vertically aligned telecommunications room (TR). In the spec you note in a footnote with details that the slots at one end of the telecommunications room (TR) must be flush with the floor and the sleeves provide at the end of the telecommunications room (TR) must also be flush.

In your meeting with the electrical engineering firm that has provided the spec, you make the comment that according to best practices, the MINIMUM that slots and sleeves must extend above the finished floor are:

91. When designing a connection to an outlying building you decide to choose a physical ring.

Your primary reason for considering a physical ring is:

92. You are given a choice of methods of routing backbone cabling vertically through a building.

The one option that you do NOT want to use is:

93. When designing a campus distribution system involving small buildings with only one horizontal cross-connect (HC) [Floor distributor (FD)] per building, you can eliminate the need for a(n):

94. The RECOMMENDED balanced twisted-pair cable for building backbone cabling consists of ________ round solid copper conductors with a nominal characteristic of 100 ohm.

95. In reviewing your client’s network needs for today and 5 years into the future, you note their current specs call for a 1Gb/s network within a campus environment, with little or no possibility of any increased bandwidth demands until they move to their planned future site. The building is not large, and the cable lengths will not exceed 550 m (1804 ft).

Your recommendation for the fiber to be installed in the backbone is:

96. Multimode optical fiber is generally used for campus or building applications due to the ability to use cost effective:

97. One advantage of using preconnectorized jumpers and cables is:

98. You have been asked to design a backbone cable connecting two large campus buildings. Your pathways will include using conduits, maintenance holes, and one section of 100 m (328 ft) of direct buried optical fiber cable.

Your choice of fiber optic cable type recommendation is a:

99. You have been asked to project manage a fiber cable backbone installation. In the course of the installation, you notice the fiber cable with a 25 mm (1 in) outside diameter is being installed into a small TR, and the cable is being installed into a tight corner.

Based on your knowledge of minimum bend radius requirements for fiber cable, you must ensure that the MINIMUM cable bend radius of _______________ is provided when the cable installation is completed.

100. The decision regarding the number of optical fibers to install (fiber strand count) in a backbone depends largely on all of the following EXCEPT: