RCDD Chapter 4
The Registered Communications Distribution Designer, or RCDD, is a certification offered by Building Industry Consulting Service International (BICSI) is an engineering-oriented IT communications credential. Do you have what it takes to earn your RCDD certification?
- 1.
The horizontal distribution system consists of two basic elements- the horizontal pathways and related spaces, and the horizontal cabling system.
- A.
True
- B.
False
Correct Answer
A. True -
- 2.
Horizontal pathways include which of the following?
- A.
Conduit
- B.
Pull boxes
- C.
Cable tray
- D.
TP/CP/HCP locations
Correct Answer(s)
A. Conduit
C. Cable tray -
- 3.
Pathway system implementation involves both the cable pathway itself (e.g. cable tray) and related spaces (e.g. pull boxes, splice boxes, and transition point/consolidation point/horizontal connection point [TP/CP/HCP] locations that provide access to cable and connecting hardware
- A.
True
- B.
False
Correct Answer
A. True -
- 4.
The horizontal cabling system includes:
- A.
Work area equipment cord
- B.
Telecommunications outlet/connectors or MUTOA
- C.
BAS outlet/connectors
- D.
TP,CP, or HCP connectors installed between telecom outlet/connectors and the HC (FD)
- E.
Jumpers and patch cords used to configure horizontal cabling connections in the TR or TE
Correct Answer(s)
A. Work area equipment cord
B. Telecommunications outlet/connectors or MUTOA
C. BAS outlet/connectors
D. TP,CP, or HCP connectors installed between telecom outlet/connectors and the HC (FD)
E. Jumpers and patch cords used to configure horizontal cabling connections in the TR or TE -
- 5.
The floor area served by a TE should not exceed what size?
- A.
200 square meters (2500 square feet)
- B.
335 square meters (3600 square feet)
- C.
425 square meters (4700 square feet)
- D.
535 square meters (5000 square feet)
Correct Answer
B. 335 square meters (3600 square feet) -
- 6.
When selecting and designing the horizontal pathway systems, it is important to consider the design's ability to:
- A.
Accomodate cabling changes
- B.
Minimize occupant disruption when horizontal pathways are accessed
- C.
Both of the above
Correct Answer
C. Both of the above -
- 7.
The pathway design should allow for a minimum of how many, four-pair cable runs per individual work area?
- A.
1
- B.
2
- C.
3
- D.
4
Correct Answer
C. 3 -
- 8.
The designer should locate telecommunications pathways away from sources of EMI which include which of the following?
- A.
Electrical power cabling and transformers
- B.
Induction heaters
- C.
Arc welders
- D.
Static discharge
- E.
All of the above
Correct Answer(s)
A. Electrical power cabling and transformers
B. Induction heaters
C. Arc welders -
- 9.
What is the minimum seperation distance for unshielded power lines or electrical equipment in proximity to a grounded metal conduit pathway.
- A.
610 mm (24 in.)
- B.
305 mm (12 in.)
- C.
152 mm (6 in.)
- D.
1194 mm (47 in.)
Correct Answer
B. 305 mm (12 in.) -
- 10.
The minimum seperation distance from electric motors and transformers is what?
- A.
610 mm (24 in.)
- B.
305 mm (12 in.)
- C.
152 mm (6 in.)
- D.
1194 mm (47 in.)
Correct Answer
D. 1194 mm (47 in.) -
- 11.
The minimum seperation distance for power lines enclosed in a grounded metal conduit (or equivalent shielding) in proximity to a grounded metal pathway is what?
- A.
610 mm (24 in.)
- B.
305 mm (12 in.)
- C.
152 mm (6 in.)
- D.
1194 mm (47 in.)
Correct Answer
C. 152 mm (6 in.) -
- 12.
The minimum seperation for unshielded power lines or electrical equipment in proximity to open or nonmetal pathways is?
- A.
610 mm (24 in.)
- B.
305 mm (12 in.)
- C.
152 mm (6 in.)
- D.
1194 mm (47 in.)
Correct Answer
A. 610 mm (24 in.) -
- 13.
Select the types of horizontal pathways.
- A.
Underfloor ducts
- B.
Cellular Floors
- C.
Conduit
- D.
Surface mounted raceway
- E.
All of the above
Correct Answer
E. All of the above -
- 14.
The size requirements for horizontal pathways depends on several considerations, which one of the following is not a consideration?
- A.
Usable floor space served by the pathway
- B.
People and occupants
- C.
Cable density (e.g. quantity of horizontal cables planned per individual work area)
- D.
Cable diameter
- E.
Pathway capacity
Correct Answer
B. People and occupants -
- 15.
The standard floor space allocation used in an office environment is one individual work area for every _____________ of usable floor space.
- A.
6.2 m^2 (75 ft^2)
- B.
12.4 m^2 (125 ft^2)
- C.
9.3 m^2 (100 ft^2)
- D.
23 m^2 (250 ft^2)
Correct Answer
C. 9.3 m^2 (100 ft^2) -
- 16.
The standard floor space coverage area estimated for each building automation system (BAS) is a BAS outlet or device for every ___________ of floor space.
- A.
6.2 m^2 (75 ft^2)
- B.
12.4 m^2 (125 ft^2)
- C.
9.3 m^2 (100 ft^2)
- D.
23 m^2 (250 ft^2)
Correct Answer
D. 23 m^2 (250 ft^2) -
- 17.
The designer should plan for a pathway capacity that can accommodate a minimum of ____ horizontal cable runs per individual work area.
- A.
1
- B.
2
- C.
3
- D.
4
Correct Answer
C. 3 -
- 18.
Information on sheath sharing can be found in which Telecommunications Industry Association (TIA) standard.
- A.
ANSI/TIA/EIA-568-A.1
- B.
ANSI/TIA/EIA-568-B.1
- C.
ANSI/TIA/EIA-604-2-A
- D.
ANSI/TIA/EIA-606-A
Correct Answer
B. ANSI/TIA/EIA-568-B.1 -
- 19.
During cable pulling, flexible conduit tends to:
- A.
Creep
- B.
Shift
- C.
Cause sheath damage to the cable
- D.
All of the above
Correct Answer
D. All of the above -
- 20.
If flexible conduit must be used, its size should be increased by _______ trade sizes relative to the size of a rigid conduit?
- A.
1
- B.
2
- C.
3
- D.
4
Correct Answer
A. 1 -
- 21.
Flexible conduit is not recommended for use in buildings.
- A.
True
- B.
False
Correct Answer
A. True -
- 22.
Conduit runs should be installed with no bend greater then ___________ or an aggregate of bends in excess of ___________ between pull points or pull boxes.
- A.
45 degrees, 90 degrees
- B.
90 degrees, 120 degrees
- C.
90 degrees, 180 degrees
- D.
90 degrees, 270 degrees
Correct Answer
C. 90 degrees, 180 degrees -
- 23.
Conduit runs should contain no continuous section longer than ________.
- A.
15.2 m (50 ft)
- B.
30.5 m (100 ft)
- C.
45.8 m (150 ft)
- D.
70 m (200 ft)
Correct Answer
B. 30.5 m (100 ft) -
- 24.
For runs that total more than 30.5 m (100 ft) in length, what should be inserted.
- A.
Pull points
- B.
J hooks
- C.
Pull strings
- D.
Pull boxes
Correct Answer(s)
A. Pull points
D. Pull boxes -
- 25.
Total conduit runs should be kept to ____________ or less (including sections through pull boxes).
- A.
45.8 m (150 ft)
- B.
70 m (200 ft)
- C.
120.8 m (250 ft)
- D.
140.4 m (300 ft)
Correct Answer
A. 45.8 m (150 ft) -
- 26.
Conduit should not be run where.
- A.
On top of cellular floor cells
- B.
Crosswise to cellular floor cells
- C.
Through areas in which flammable materials may be stored
- D.
Over or adjacent to Boilers, Incinerators, Hot water lines, or Steam lines
- E.
All of the above
Correct Answer
E. All of the above -
- 27.
It is ok to use aluminum or thin-walled plastic conduit in concrete floors.
- A.
True
- B.
False
Correct Answer
B. False -
- 28.
To ensure proper capacity for cabling, a conduit from a TR should not extend to more than ____ telecommunications outlet boxes and must not extend to more than ________ telecommunications outlet boxes.
- A.
1, 2
- B.
2,3
- C.
2,4
- D.
3,4
Correct Answer
B. 2,3 -
- 29.
If the conduit has an internal diameter of 51 mm (2 in.) or less then the bend radius must be at least.
- A.
2 times the internal conduit
- B.
4 times the internal conduit
- C.
6 times the internal conduit
- D.
10 times the internal conduit
Correct Answer
C. 6 times the internal conduit -
- 30.
If the conduit has an internal diameter of more than 51 mm (2 in) then the bend radius must be at least.
- A.
4 times the internal conduit
- B.
6 times the internal conduit
- C.
8 times the internal conduit
- D.
10 times the internal conduit
Correct Answer
D. 10 times the internal conduit -
- 31.
If a conduit run requires more than two 90 degree bends what must be done.
- A.
Nothing, this is not allowed
- B.
Limit the run to 15 m (50 ft)
- C.
Provide a pull box between sections with two bends or less
- D.
Increase the conduit size by 2 trade sizes
Correct Answer
C. Provide a pull box between sections with two bends or less -
- 32.
If a conduit run requires a reverse bend (between 100 degrees and 180 degrees) what must be done.
- A.
Nothing, this is not allowed
- B.
Insert a pull point or pull box at each bend having an angle from 100 degrees to 180 degrees
- C.
Increase the conduit size by 2 trade sizes
- D.
Derate the design capacity by 15%
Correct Answer
B. Insert a pull point or pull box at each bend having an angle from 100 degrees to 180 degrees -
- 33.
If a conduit run requires a third 90 degree bend (between pull points or pull boxes) what must be done?
- A.
Nothing, this is not allowed
- B.
Increase the size of the conduit by 2 trade sizes
- C.
Limit the conduit run to 15m (45 ft)
- D.
Derate the design capacity by 15% for this additional bend.
Correct Answer
D. Derate the design capacity by 15% for this additional bend. -
- 34.
A third bend may be acceptable in a pull section without derating the conduits capacity if one of 3 statements is true. Select the three statements below.
- A.
The total run is not longer than 10m (33ft)
- B.
The pull does not exceed 90kg (200 lbs)
- C.
The conduit size is increased to the next trade size
- D.
One of the bends is located within 305 mm (12 in) of the cable feed end.
Correct Answer(s)
A. The total run is not longer than 10m (33ft)
C. The conduit size is increased to the next trade size
D. One of the bends is located within 305 mm (12 in) of the cable feed end. -
- 35.
Conduits that enter a TR should terminate near the _______ to allow for proper cable racking.
- A.
Middle of the room
- B.
Corner
- C.
Horizontal cross-connect (HC)
- D.
Equipment rack
Correct Answer
B. Corner -
- 36.
Terminate conduits that protrude through the structural floor ________ above the surface.
- A.
12 mm (.5 in) to 37 mm (1.5 in)
- B.
25 mm (1 in) to 50 mm (2 in)
- C.
25 mm (1 in) to 76 mm (3 in)
- D.
50 mm (2 in) to 76 mm (3 in)
Correct Answer
C. 25 mm (1 in) to 76 mm (3 in) -
- 37.
All conduits should be equipped with a pull cord that has a minimum test rating of what.
- A.
45 kg (100 lb)
- B.
67 kg (150 lb)
- C.
90 kg (200 lb)
- D.
135 kg (300 lb)
Correct Answer
C. 90 kg (200 lb) -
- 38.
A conduit sleeve that is larger than the main conduit and slipped over an opening in a conduit run after the cable is in place is called a.
- A.
Gutter
- B.
Slip channel
- C.
Slip sleeve
- D.
Pull box
Correct Answer
C. Slip sleeve -
- 39.
A square, sheet metal housing placed over an opening in a conduit run is called what?
- A.
Gutter
- B.
Slip channel
- C.
Slip sleeve
- D.
Pull box
Correct Answer
A. Gutter -
- 40.
Slip sleeves or gutters can be used as splice locations.
- A.
True
- B.
False
Correct Answer
B. False -
- 41.
Select the true statements about an access floor.
- A.
It is raised above an existing floor
- B.
It provides accessible space under the floor panels
- C.
Are most often used in computer rooms and equipment rooms
- D.
Are not made of combustible materials
- E.
All of the above
Correct Answer(s)
A. It is raised above an existing floor
B. It provides accessible space under the floor panels
C. Are most often used in computer rooms and equipment rooms -
- 42.
An access floor typically consists of?
- A.
Longitudinal cross members
- B.
Steel footings that rest on the subfloor
- C.
Pedestals that support and interlock with lateral bracing (stringers) or panels
- D.
Floors that may or may not be constructed with stringers
- E.
Modular floor panels that rest on the stringers or pedestals, and come in sizes from 457 mm (18 in) to 610 mm (24 in ) square
Correct Answer(s)
B. Steel footings that rest on the subfloor
C. Pedestals that support and interlock with lateral bracing (stringers) or panels
D. Floors that may or may not be constructed with stringers
E. Modular floor panels that rest on the stringers or pedestals, and come in sizes from 457 mm (18 in) to 610 mm (24 in ) square -
- 43.
The minimum finished height of access floor when used in a computer or control room environment where the plenum is used for heating, ventilating and air conditioning is?
- A.
203 mm (8 in)
- B.
305 mm (12 in)
- C.
423 mm (18 in)
- D.
610 mm (24 in)
Correct Answer
B. 305 mm (12 in) -
- 44.
Regardless of the height of the finished floor, a minumum of _______ of free space should exist between the top of the cable tray side rails, and the underside of the stringers.
- A.
26 mm (1 in)
- B.
51 mm (2 in)
- C.
77 mm (3 in)
- D.
110 mm (4 in)
Correct Answer
B. 51 mm (2 in) -
- 45.
When planning access flooring for new or existing buildings, what are the two common types of building structures that should be considered?
- A.
Slab on grade (used for new construction and renovations)
- B.
Depressed slab (used only in new construction)
- C.
Elevated slab (for use in renovations only)
- D.
Normal slab (in existing and renovated buildings)
Correct Answer(s)
B. Depressed slab (used only in new construction)
D. Normal slab (in existing and renovated buildings) -
- 46.
Select the true statements about floor panels and their coverings.
- A.
Panels used in computer rooms may be covered with factory laminated carpet
- B.
Panels used in computer rooms will be covered by High pressure laminate or Vinyl or other durable tile
- C.
Panels used in offices will be covered with factory laminated carpet
- D.
Panels used in offices may not be covered (e.g. ready to recieve carpet tiles)
- E.
All of the above
Correct Answer(s)
B. Panels used in computer rooms will be covered by High pressure laminate or Vinyl or other durable tile
C. Panels used in offices will be covered with factory laminated carpet
D. Panels used in offices may not be covered (e.g. ready to recieve carpet tiles) -
- 47.
Access floors may be designed to bear different uniform (distributed) loads and concentrated loads, according to the intended use of the room.
- A.
True
- B.
False
Correct Answer
A. True -
- 48.
What is the load capacity for equipment room flooring (medium duty).
- A.
4.4 kN (1000 lbf) Concentrated Load Capacity
- B.
4.8kPa (100 lbf/ft^2) Uniform Load Capacity
- C.
2.4 kPa (50 lfb/ft^2) Uniform Load Capacity
- D.
8.8 kN (2000 lbf) Concentrated Load Capacity
Correct Answer(s)
B. 4.8kPa (100 lbf/ft^2) Uniform Load Capacity
D. 8.8 kN (2000 lbf) Concentrated Load Capacity -
- 49.
What is the load capacity for general office flooring (medium duty)?
- A.
4.4 kN (1000 lbf) Concentrated Load Capacity
- B.
4.8kPa (100 lbf/ft^2) Uniform Load Capacity
- C.
2.4 kPa (50 lfb/ft^2) Uniform Load Capacity
- D.
8.8 kN (2000 lbf) Concentrated Load Capacity
Correct Answer
C. 2.4 kPa (50 lfb/ft^2) Uniform Load Capacity -
- 50.
How are dynamic loads created on access flooring?
- A.
Accidental impacts (e.g. falling objects)
- B.
Installing equipment racks
- C.
Rolling objects (e.g. paper carts, mail mobiles, other wheeled vehicles)
- D.
Permenantely installing equipment on a floor tile
Correct Answer(s)
A. Accidental impacts (e.g. falling objects)
C. Rolling objects (e.g. paper carts, mail mobiles, other wheeled vehicles) -
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