Question 1

Using the sound pressure level (SPL) method of approximating distance and power, calculate the power required to produce 89 dB at 4 m (13.1 ft) with a loud speaker that is rated at a SPL of 95 dB. What input power level (in watts) is required to appropriately power the speaker?

Accepted Answer

The answer of Using the sound pressure level (SPL) method...

Question 2

What type of facility requires a building automation system (BAS) device to be located every 5 sq m (50 sq ft)?

Accepted Answer

A mechanical room requires a BAS device to be located every 5 sq m (50 sq ft) to ensure proper monitoring and control of mechanical systems, such as HVAC, lighting, and security.

Question 3

A space has all hard surfaces including architecture and furnishings. The audio programming produced from the distributed sound system has become unintelligible. Which of the following will NOT mitigate the problem?

Accepted Answer

Increasing the volume of the existing speakers will only further exacerbate the problem by adding more noise to an already acoustically challenging space. The best choice would be to add tapestries to the walls to absorb some of the sound reflections and provide additional speakers at lower output to distribute the sound more evenly throughout the space. The reduction of distance of the existing speakers to the listener can also be effective, but adding tapestries and additional speakers will have a greater impact on improving the overall acoustic quality of the space.

Question 4

You are placing PTP fiber between two locations 55 km (34 miles) apart. You are told that DWDM equipment will be installed within the next 5 years. Which of the following optical fiber types should you use?

Accepted Answer

Non-zero dispersion shifted (ITU-G655) fiber is the best choice in this scenario because it is designed to reduce the dispersion effect caused by the high-bit rate signals used in DWDM equipment. This fiber type allows for higher bit rates and longer transmission distances without the need for dispersion compensation.

Question 5

IPv-4 addresses are ________ bits in length.

Accepted Answer

IPv-4 addresses are 32 bits in length, which is why they can support approximately 4 billion unique addresses.

Question 6

In a hallway with normal traffic, ceiling mounted speakers should be placed ________ times the corridor height, minus the ________.

Accepted Answer

In a hallway with normal traffic, ceiling mounted speakers should be placed two times the corridor height, minus the average height of the listener's ear, to ensure optimal sound coverage and clarity.

Question 7

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

Accepted Answer

Data representation including code translations, compressions, and encryptions is performed by the Presentation Layer (Layer 6) of the OSI model. This layer is responsible for ensuring that data is properly formatted, compressed, encrypted, and decrypted before it is transmitted or received.

Question 8

You have been selected to recommend a solution to increase response time and add fault tolerance to a bank of servers. Your budget is limited and the client needs a solution as soon as possible (ASAP). Which of the following options should be considered with the short time frame and limited budget?

Accepted Answer

Device clustering offers both increased response time and fault tolerance, allowing for servers to work together to handle workload and automatically switch over in case of failure. It can often be implemented quickly and at a relatively low cost.

Question 9

You have just assumed management responsibility over an older network consisting of passive hubs and some layer 2 switches. The network is experiencing massive slow downs on an irregular basis. Which of the following is the MOST effective immediate solution to the problem?

Accepted Answer

The answer of You have just assumed management responsibility over...

Question 10

The ITU-T G.711 standard deals with what aspect of video conferencing?

Accepted Answer

ITU-T G.711 standard deals with voice compression during video conferencing.

Question 11

You are designing a four story retail mall and multiple sound systems within it. Which system should you design to support general music programming within common retail areas?

Accepted Answer

A sound reinforcement and playback system would be the best choice to support general music programming within common retail areas as it is specifically designed to reproduce high-quality audio in commercial settings. This type of system will ensure that shoppers experience the intended music programming with clarity and sound quality, enhancing the overall shopping experience.

Question 12

Geographically speaking, a __________ covers an area associated with an individual's work space.

Accepted Answer

The answer of Geographically speaking, a __________ covers an area...

Question 13

Which layer of the OSI model covers physical cable connections?

Accepted Answer

Layer 1 of the OSI model covers physical connections and deals with the transmission of raw bits over physical cables or wireless connections. This layer is responsible for the physical characteristics of the wires or radio frequencies used to transfer data.

Question 14

What type of address is 10.162.02.14?

Accepted Answer

This is an IP address, as indicated by the use of periods and the four octets.

Question 15

Which of the following protocols is referred to under ISO 16484-5?

Accepted Answer

ISO 16484-5 is a standard for building automation and control systems, and BACnet is a protocol specifically referenced in this standard. The other choices are not referenced in this standard.

Question 16

Geographically speaking, a ______ links two or more distant sites.

Accepted Answer

WAN (Wide Area Network) is designed to connect multiple geographically distant sites. SAN (Storage Area Network) connects servers and storage devices within a data center. PAN (Personal Area Network) connects devices within a personal space, such as a smartphone and smartwatch. LAN (Local Area Network) connects devices within a localized area, such as a home or office. CAN (Campus Area Network) connects multiple buildings in a campus-like environment.

Question 17

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

Accepted Answer

The expected life cycle of a building automation system is typically 5 to 7 years, as it is a component of the building's infrastructure and is subject to the same wear and tear as the rest of the building.

Question 18

What is the recommended distance between ceiling mounted speakers in a hallway with heavy traffic?

Accepted Answer

The recommended distance between ceiling mounted speakers in a hallway with heavy traffic should be around 8 feet or 2.4 meters apart. This spacing will ensure that the sound remains consistent and clear throughout the entire hallway without being too overwhelming for pedestrians passing through.

Question 19

What type of address is 00-A1-C3-52-CE-11?

Accepted Answer

The address 00-A1-C3-52-CE-11 is a MAC address, which is a unique identifier assigned to each network interface controller (NIC) for use as a network address in communications within a network segment. It is not an IP address, host name, or broadcast address. It is also not possible to determine if it is a unicast or multicast address without additional information about the network and communication protocols in use.

Question 20

What are the three typical voltages used in centrally amplified paging systems?

Accepted Answer

The three typical voltages used in centrally amplified paging systems are 25, 70, and 100 volts. These voltages are used to allow for multiple speakers to be connected in a daisy-chain configuration without causing impedance problems. The use of higher voltages results in lower current draw and more efficient power distribution, allowing for longer speaker cable runs and fewer power sources needed.

Exam 1: BICSI Registered Communications Distribution Designer - RCDD