RCDD-002 Sample Questions Answers

The headend has several audio-video playback devices within it. What piece of equipment is required to assign their output signals to specific RF carriers on the CATV system?

A building has six floors plus a basement. Each floor is 10,000 square feet and has approximately 50 CATV outlets respectively. There is a single hardline trunk cable installed from the basement headend passing through a directional coupler in each floor's telecommunications room (TR). Which leg of the coupler will have the LEAST signal loss?

An active video converter is used in what type of CATV cable distribution system?

The headend has several modulators assigning frequencies for distribution to the CATV network. What distribution device should you use immediately at the headend to distribute the modulator's output signals to CATV system?

You are designing a system requiring the transmission of data. Your system must perform higher than ________ kHz in order to do so.

To accommodate telephone, data, CATV, security and multimedia, a MINIMUM of ________ strands of optical fiber auxiliary disconnect outlet (ADO) cable should be provided.

You have just finished a design calling for 15 telecommunications outlets. You received word that the owner has increased his requirements by 40%. What size commercial DD (distribution device) is required to accommodate the increase?

What is the air change requirement for a tunnel of 610 m (2000 ft) long with a diameter of 3.4 m (11 ft)?

One interior TTY must be provided at locations defined as public accommodations with ________ or more pay telephones.

What is the MINIMUM distance from the edge of a pool or other water hazards for a weatherproof enclosure?

Which type of protection for electrical power stations provide isolation against a rise in potential of station ground and also provide drainage protection against longitudinally-induced voltages?

In new construction, what is the percentage of pay phones that must be equipped with volume controls?

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)?

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

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

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

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?

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

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

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

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?

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?

When allocating termination space for CAT 6 and optical fiber cables, it is recommended that additional space of up to ________ percent be considered for the routing of the cables and patch cords.

In addition to voice and data services, an equipment room (ER) can be designed to include all of the following EXCEPT:

You are placing two 423 mm (19 in) relay racks with a 152 mm (6 in) vertical management panel on each end and a 12 in vertical cable management panel between the racks. The rack lineup begins against a wall in the room. What is the MINIMUM room size required?

At a minimum, convenience receptacles in an ER or TR are to be located ________ AFF.

A building can have multiple equipment rooms (ERs) for all of the following reasons EXCEPT:

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

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:

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

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

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:

Certain systems must exist relative to bonding and grounding at every site. Which of the following is NOT one such system?

Surge currents due to lightning and other sources MUST be ________ before they penetrate the infrastructure.

As a guide, the recommended maximum AC current value on any bonding conductor should be less than ________ amperes.

Which of the following covers lightning protection systems and defines as exposed anything above ground and outside the zone of protection?

The recommended MAXIMUM value for the bonding resistance between the nearest available grounding electrode and the busbar in an entrance facility (EF) is ________ ohms.

Using Ohms law, a circuit of 120 volts and a resistance of 15 ohms will have a current of ________ amps.

The formula for calculating BTUs from electrical power is:

A large telecommunications facility, by most codes, must be designed with an EPO switch located at:

All of the following are used to control static discharge EXCEPT:

If you have a circuit with 120 volts, 12 amps, and 10 ohms, it has a peak power of ________ watts.

Aerial entrances to small buildings should be limited to ________ cable pair or less.

The MAXIMUM span length for an aerial entrance, from the last pole to the building, must NOT exceed:

The information technology system (ITS) designer should design conduits entering a building from ceiling height to terminate ________ below the finished ceiling.

An outside plant (OSP) cable must be placed under a pipeline with two side by side pipe runs. The distance between the outside pipes is 6 m (20 ft). What is the length of the conduit required to facilitate the pipeline crossing?

The MOST common medium used to provide service to the access point (AP) is ________ cable.

You are preparing to test newly installed open office cabling. Within the open office cabling, there are multiple consolidation points (CP) that were installed while waiting for furniture. How do you proceed with permanent link testing?

Exhibit:

The diagram below is a typical configuration for:

What is the worst case acceptance value for attenuation when testing 2000 m (6562 ft) of 50/125 multimode fiber at a wavelength of 1300 nm when the fiber has 2 connector pairs and 3 splices?

When balanced twisted-pair copper cabling, return loss is a measurement of the:

Where backbone cabling exceeds cabling lengths for the same performance or design (for product used in horizontal cabling), there are three fundamental tests which should be considered when testing. They are:

In (ESS) design, employees, reputation, and materials are all examples of:

The distance a CCTV signal may be run is determined by the strength of the signal at the source, required signal strength at the receiver, and:

What is the MOST important aspect of fire alarm signaling?

A security program consists of three independent components. They are electronic, architectural, and:

You are designing a strobe visual notification system for a fire alarm system. You have a hallway that is 4.6 m (15 ft) wide and 100 m (328 ft) long. How many strobes should be placed in the hallway?

Which of the following is NOT a primary type of DAS antenna?

Which device supplies the radio signal into a DAS (distributive antenna system)?

When considering the DAS, which component acts as a bidirectional antenna?

What is at the "root" of a DAS (distributive antenna system)?

In order to maximize its ability to send and receive, an antenna should be ________ to the desired frequency.

If you are using a building automation system (BAS) protocol operating on RF media at 19,200 b/s in the 868 MHz band, which protocol are you using?

Within a heating ventilation and air conditioning automatic control system, what do the letters DDC stand for?

What is the expected life cycle, in years, of building automation system within a building structure with a life cycle of 40+ years?

Within building automation hardware systems, there is a hierarchical system of micro processor based controllers. Which type of controller is used to provide limited port capacity for connection of sensors, support, and execution of DDC programs, and usually operates in stand alone mode?

What is the expected lumenance value, in watts, of a 200 watt fluorescent lamp after three years?

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:

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:

Which of the following is NOT true about consolidation points?

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

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?

At the end of the second week of a project, the earned value (EV) of work is $8000 USd and the planned value (PV) of work is $7000 USd. What is true about the project?

What is the PERT estimate (in hours) for project design where:

- Optimistic time is 40 hours

- Most likely time is 50 hours

- Pessimistic time is 60 hours

Which of the following does NOT describe one of the four main types of specifications?

When developing a safety plan, consider all of the following EXCEPT:

A scope of work should contain all of the following EXCEPT:

Within a data center, how many concentric layers are considered necessary to provide effective security?

You have been asked to spec the physical security requirements related to the protection of assets for a new data center. The most common potential for damage categories you have considered include temperature, gases, organisms and projectiles. The one category that you have missed is:

You are designing a cabling containment system installed overhead in a new data center. The main or prime purpose of the system will be to manage fiber optic cabling between cabinets. You have a choice of designs of the containment system. In view of the prime purpose of containment system, your first choice of design will be one that:

Within a data center, if you have dual path connectivity between the primary entrance room and secondary entrance room, in addition to dual connectivity between these two rooms and the main distribution and secondary distribution areas, what tier level would this infrastructure design represent?

If you have a 30 cm (12 in) wide data tray, what does ANSI/TIA 569-B recommend be the maximum pathway fill cross sectional area assuming a MAXIMUM pathway depth of 15 cm (6 in)?

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

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?

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?

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

This type of cable is an unbalanced system:

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.

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:

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

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:

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):

Assume the following:

- An equipment room (ER) consists of 16 racks arranged in 4 equal rows

- The first 4 racks are numbered R1-1 though R1-4

- The second 4 racks are numbered R2-1 through R2-4

- A new equipment shelf with 12 slots is to be installed in the bottom of the third rack in the second row

- Each slot has 2 ports

What would be the identifier of the two ports on the eighth slot of the new equipment shelf?

Class ________ administration provides for the telecommunications infrastructure administration needs of a single building, or of a tenant served by a single or multiple. It also includes administration for backbone cabling, systems, and.

If a telecommunications grounding busbar is installed in the telecommunications room (TR) with the identifier of 310, located on the third floor, then the telecommunications grounding busbar should be labeled as:

When labeling pathways, which one of the following guidelines should be met?

Which class of the system applies when the premise only has a single equipment room (ER), and it is the only telecommunications space administered?

How much area of wall space is needed in the telecommunications room (TR) to support a nurse call system?

The ________ system is an application used for storing and viewing captured digital radiology image files.

Which of the following is used to create an electronic signal that can be sent to the central nurse call equipment?

You are designing a nurse call system for a health care facility. The system will have emergency call switches. What is the first step you should take in designing the nurse call system?

You are renovating telecommunication rooms that support an acute care facility that has 10,000 sq ft floors. The facility will be adding 15,000 sq ft to each of the floors. What is the MINIMUM additional floor space that you will need to expand the TRs to support the new floor space?

MAC addresses are _____________ bits in length.

ITU-T G.655 recommends which type of singlemode optical fiber?

Data representation including code translations, compressions, and encryptions is performed by what layer of the OSI model?