Question 1

BICSI recommends that any trench ________ or more deep must be shored to prevent cave in.

Accepted Answer

According to BICSI, any trench 1.5m (5ft) or more deep must be shored to prevent cave in.

Question 2

When installing underground entrances, no more than ________ 90-degree bends should be included between pulling points.

Accepted Answer

No more than two 90-degree bends should be included between pulling points when installing underground entrances. This reduces the risk of cable damage or excessive pulling tension.

Question 3

When selecting poles for aerial telecommunications facilities, which of the following is the class number for the strongest rated pole?

Accepted Answer

The class number for the strongest rated pole is 00. This is because it represents a pole that has a minimum circumference of 18 inches at the top and is constructed with the strongest materials such as steel and concrete. This class of pole is typically used for high voltage transmission lines and other critical infrastructure.

Question 4

When a building is not on the property line, the building owner should provide a MINIMUM of ________ conduits from a point inside the building, to the property line or easement for entrance facilities.

Accepted Answer

The minimum number of conduits required is two.

Question 5

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

Accepted Answer

According to industry standards, the maximum span length for an aerial entrance, from the last pole to the building, should not exceed 100 feet (30 meters). Therefore, the correct option is B.

Question 6

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

Accepted Answer

The answer of The information technology system (ITS) designer should...

Question 7

Buildings larger than ________ must contain a dedicated room for the termination of entrance facilities.

Accepted Answer

According to the Telecommunications Industry Association's TIA-569 standard, buildings larger than 9300 square meters (100,000 square feet) must contain a dedicated room for the termination of entrance facilities. Therefore, option C is the correct answer. Options A, B, D, and E are incorrect because they are either smaller or larger than the required size according to the TIA standard.

Question 8

You have the responsibility of designing a railroad track crossing for an outside plant OSP cable. There are three separate railroad tracks to be crossed. The measurement between the center of the two outer tracks is 16 m (52 ft). Using the standard track width of 1435 mm (4 ft 8.5 in), what is the length of the rigid steel conduit required to facilitate the crossing?

Accepted Answer

The length of the rigid steel conduit should cover the distance between the outer tracks plus additional length for safety and installation purposes. The distance between the outer tracks is 16 m, and considering the standard track width and additional safety margins, the conduit length should be around 31 m.

Question 9

You are placing an entrance cable between two buildings connected by a conduit 205.3 m (588 ft) in length. What would be the MAXIMUM length of unlisted OSP cable that could be used before you terminate the cable or transition it to a listed cable?

Accepted Answer

According to NEC 830.6(A), the maximum length of unlisted OSP cable that can be used for an entrance cable between buildings is 200 m (656 ft). However, for cables installed within a conduit, NEC 830.24(A) allows for an additional 5% cable length, which would bring the maximum length up to 210 m (689 ft). However, the conduit length of 205.3 m (588 ft) is already very close to this limit, and considering potential cable slack, termination space, and future maintenance needs, it is best to err on the side of caution and terminate or transition the cable before reaching the full 210 m limit. Therefore, the best choice is C, 209 m (686 ft).

Question 10

Which one of the following is NOT an advantage of direct-buried cable?

Accepted Answer

Direct-buried cables are not flexible for future reinforcements or changes because they are buried underground, making it difficult to access and modify them once installed.

Question 11

To reduce the chance of an accidental dig-up, plastic warning tape should be placed a MINIMUM of _________ below grade, but high enough above cables to allow detection before cables are damaged.

Accepted Answer

According to industry standards, plastic warning tape should be placed at least 12 inches (300 mm) below the surface to reduce the chance of accidental dig-ups. This allows for enough depth for proper burial, while still allowing for detection before cables are damaged.

Question 12

Which of the following is NOT a type of intrusion detection system sensor?

Accepted Answer

There is no such thing as a "time-auxiliary" sensor in intrusion detection systems. The other options (capacitance, vibration, electromechanical, and thermal) are all commonly used sensor types.

Question 13

What is the MINIMUM number of outside building terminal pedestals required to serve a single story office, or office warehouse structure that has ten 18.3 m x 24 m (60 ft x 80 ft) units and the total building length is 183 m (600 ft)?

Accepted Answer

Each unit has dimensions of 18.3 m x 24 m, so the total area of the ten units is (18.3 m x 24 m) x 10 = 4392 m². The length of the building is 183 m. The National Electrical Code recommends one terminal pedestal for every 90 m² of outdoor area. Therefore, the minimum number of pedestals required is (4392 m² / 90 m²) + 1 (for the building exterior) = 50.8, rounded up to 51. However, it is common for builders to use two pedestals for redundancy and easier access, so the best answer is B) Two.

Question 14

Which one of the following is NOT an advantage of underground conduit?

Accepted Answer

Underground conduit typically has a higher initial installation cost compared to other types of cable installation methods such as aerial or direct burial.

Question 15

What is the MINIMUM cover for underground conduit?

Accepted Answer

The answer of What is the MINIMUM cover for underground...

Question 16

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?

Accepted Answer

The answer of You are designing a strobe visual notification...

Question 17

What is the horizontal separation, in well tamped earth, required between power and direct buried telecommunications facilities sharing the same trench?

Accepted Answer

The horizontal separation required between power and direct buried telecommunications facilities in well tamped earth is typically 300 mm (12 in) to ensure safety and prevent interference.

Question 18

All entrance conduits should be equipped with a plastic or nylon line with a MINIMUM test rating of _________ pulling tension.

Accepted Answer

The answer of All entrance conduits should be equipped with...

Question 19

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

Accepted Answer

The answer of Aerial entrances to small buildings should be...

Question 20

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

Accepted Answer

Balanced twisted pair cable, such as Category 5e or 6, is the most commonly used medium to provide service to an access point due to its cost-effectiveness, ease of installation, and availability. Optical fiber cables are typically more expensive and require specialized equipment for termination and splicing, making them less common in small to medium-sized deployments. Unbalanced twisted pair cables, such as coaxial cables, are also less common due to their susceptibility to interference and signal degradation over distance.

Exam 1: BICSI Registered Communications Distribution Designer - RCDD