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質問 # 95
Which of the following translates the IP address of a computer in a local network to a single IPaddress?
- A. MAC
- B. NAT
- C. HTTP
- D. TCP
正解：B
解説：
Network Address Translation (NAT) is a method used to translate the private IP addresses of computers within a local network to a single public IP address. This allows multiple devices on a local network to access external networks (such as the internet) using a single IP address, conserving the number of public IP addresses needed and providing a layer of security by masking internal IP addresses from the outside world.
質問 # 96
Assuming a 10' (3 m) ceiling, what is the approximate volume of this room?
- A. 600 cubic ft (17 m3)
- B. 300 cubic ft (8.5 m3)
- C. 1500 cubic ft (42.5 m3) o
- D. 6000 cubic ft (162 m3)
正解：D
解説：
To find the volume of the room, we need to calculate the area of the floor and multiply it by the height of the ceiling. The room has a ceiling-mounted DLP projector and a 10' x 58" ceiling-mounted electric screen. Using standard room dimensions, we estimate the room's length and width to fit the equipment layout proportionally.
Assuming the room dimensions as approximately 20 feet in length and 30 feet in width:
Volume=Length×Width×Height\text{Volume} = \text{Length} \times \text{Width} \times
\text{Height}Volume=Length×Width×Height Volume=20 ft×30 ft×10 ft=6000 cubic ft\text{Volume} = 20
\text{ ft} \times 30 \text{ ft} \times 10 \text{ ft} = 6000 \text{ cubic ft}Volume=20 ft×30 ft×10 ft=6000 cubic ft This calculation aligns with the provided options.References:
* Axis Communications - Room Design and Calculation Guidelines
* Standard Architectural Practices
質問 # 97
The purchaser in an AV solutions firm has a key role to play in the area of
- A. coordinating project documentation and commissioning.
- B. reviewing the customer needs analysis to determine best solutions.
- C. estimating manpower availability and scheduling.
- D. communicating with vendors and internal staff members.
正解：D
解説：
The purchaser's key role includes communication with vendors and internal staff, managing order timelines, pricing, and ensuring that the necessary components are available when needed, which is essential for project efficiency.
CTS Technology Specialist ReferenceCTS materials highlight the role of procurement in maintaining project flow and ensuring timely delivery of AV components through effective vendor relations and internal coordination.
質問 # 98
Assuming a 10' (3 m) ceiling, what is the approximate volume of this room?
- A. 600 cubic ft (17 m3)
- B. 300 cubic ft (8.5 m3)
- C. 1500 cubic ft (42.5 m3) o
- D. 6000 cubic ft (162 m3)
正解：D
解説：
To find the volume of the room, we need to calculate the area of the floor and multiply it by the height of the ceiling. The room has a ceiling-mounted DLP projector and a 10' x 58" ceiling-mounted electric screen. Using standard room dimensions, we estimate the room's length and width to fit the equipment layout proportionally.
Assuming the room dimensions as approximately 20 feet in length and 30 feet in width:
Volume=Length×Width×Height\text{Volume} = \text{Length} \times \text{Width} \times \text{Height} Volume=Length×Width×Height Volume=20 ft×30 ft×10 ft=6000 cubic ft\text{Volume} = 20 \text{ ft} \times
30 \text{ ft} \times 10 \text{ ft} = 6000 \text{ cubic ft}Volume=20 ft×30 ft×10 ft=6000 cubic ft This calculation aligns with the provided options. References:
* Axis Communications - Room Design and Calculation Guidelines
* Standard Architectural Practices
質問 # 99
During a routine service visit, an engineer notices an LED indicator on a projector's front panel blinking regularly. What should be done?
- A. replace the projector's lamp and filters
- B. remove the power cable and re-boot the projector
- C. consult the projector's manual
- D. disregard because the projector is operational
正解：C
解説：
When an LED indicator on a projector blinks regularly, it typically signifies an error or a status message that needs attention. The correct course of action is to consult the projector's manual. The manual will provide specific information regarding what the blinking pattern means and the appropriate steps to resolve the issue.
This method ensures that the engineer addresses the problem correctly without causing further damage or misdiagnosing the issue.References:
* Axis Communications - Maintenance and Troubleshooting Guide
* Manufacturer's Projector Manuals
質問 # 100
A single panel in a large video wall is flickering. Where should the technician begin troubleshooting?
- A. at the video content source
- B. at the media server
- C. at the non-responsive panel
- D. at the video wall input
正解：C
解説：
When a single panel in a video wall is flickering, the issue is likely isolated to that specific panel or its connections. Starting troubleshooting at the non-responsive panel allows the technician to check for loose cables, faulty connections, or individual panel issues before looking at system-wide components.
CTS Technology Specialist ReferenceCTS troubleshooting protocols recommend starting with the component that is exhibiting the issue, which is efficient for isolating localized problems within AV systems.
質問 # 101
A client requests for a project to be completed earlier than initially scheduled. What should the AV contractor do FIRST to address this change?
- A. provide a change order (CO) to the client outlining changes to the project and any additional costs
- B. provide a request for change (RFC) to the client to approve the change to the schedule
- C. deny the request and work to the original agreed schedule
- D. allocate more resources to meet the earlier completion date
正解：B
解説：
When a client requests an earlier project completion date, the AV contractor should first issue a Request for Change (RFC). This formal request documents the proposed schedule change and requires client approval. It allows for assessment of resource requirements, timeline adjustments, and any potential cost implications.
CTS Technology Specialist ReferenceThe CTS guidelines stress documenting changes through formal requests like RFCs to ensure client approval and clarity on any impact to the project.
質問 # 102
For a design-bid (tender)-build project, the final step for determining the owner's costs for an AV system is
- A. selecting an Integrator.
- B. having the owner approve the design.
- C. performing a needs analysis.
- D. ensuring the equipment specification is ready for bid.
正解：D
解説：
For a design-bid (tender)-build project, the final step for determining the owner's costs for an AV system is ensuring the equipment specification is ready for bid. This step involves finalizing all equipment details, specifications, and requirements so that accurate bids can be obtained from potential contractors. Axis documentation indicates that having precise and detailed equipment specifications is critical for obtaining accurate project costs and selecting the best contractor for the job.
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質問 # 103
After there is an approved labor change to a project, what should the project manager do NEXT?
- A. update the schedule
- B. inform the purchasing department
- C. order the equipment
- D. issue an invoice for the change
正解：A
解説：
Once a labor change is approved, the next step for the project manager is to update the project schedule.
Changes in labor can affect the timeline of the project, and updating the schedule ensures that all stakeholders are aware of the new timelines and can adjust their plans accordingly. This step is critical for maintaining project organization and ensuring that the project stays on track despite the changes.
質問 # 104
One MAIN benefit of multicast over unicast in a network AV solution is it
- A. reduces network bandwidth whenusing multipleencoders.
- B. reduces network bandwidth whenusing multipledecoders.
- C. supports multi-channel audio.
- D. supports higher video resolutions.
正解：B
解説：
Multicast transmission in a network AV solution significantly reduces network bandwidth when using multiple decoders. With multicast, a single stream of data is sent from the source and is then distributed to multiple recipients by the network infrastructure. This contrasts with unicast, where a separate stream is sent to each recipient, leading to higher bandwidth consumption. Multicast is particularly efficient in scenarios where the same content needs to be delivered to multiple devices, such as digital signage or IPTV.
質問 # 105
Which section of the Ohm's Law chart should be used to calculate values expressed in Ohms? Select the answer by clicking anywhere within the correct quadrant.
正解：
解説：
Explanation:
Ohm's Law is a fundamental principle used in electrical engineering and physics to describe the relationship between voltage (V), current (I), resistance (R), and power (P). The Ohm's Law chart is divided into four quadrants, each representing different formulas and relationships among these quantities.
To calculate values expressed in Ohms (which represent resistance, R), you should use Quadrant D. This quadrant contains formulas that solve for resistance (R), using various combinations of voltage (V), current (I), and power (P):
* R=VIR = \frac{V}{I}R=IV
* R=V2PR = \frac{V^2}{P}R=PV2
* R=PI2R = \frac{P}{I^2}R=I2P
These formulas are derived from Ohm's Law and the power equations, providing different ways to calculate resistance based on the available information.
References:
* Ohm's Law: Explains the relationship between voltage, current, and resistance.
* Power Formulas: Derived from the basic Ohm's Law equations and used to relate power with resistance, voltage, and current.
To further verify and detail the usage of Ohm's Law chart, you can refer to Axis Technology Specialist documentation or any standard electrical engineering textbooks which provide detailed explanations of these formulas and their applications.
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質問 # 106
During the installation of an audiovisual system, a client states that they wish to add a videoconferencing system that was not considered in the initial scope of the project. What form is required?
- A. Request for Quotes (RFQ)
- B. Request for Proposals (RFP)
- C. Request for Change (RFC)
- D. Request for Information (RFI)
正解：C
解説：
When a client requests an addition to the project that wasn't included in the original scope, such as a videoconferencing system, a Request for Change (RFC) is needed. An RFC formally documents the change in scope, budget, or timeline and ensures that all parties agree to the modifications.
CTS Technology Specialist ReferenceThe CTS guidelines discuss the use of RFCs to manage scope changes, helping avoid misunderstandings and ensuring all modifications are approved and documented.
質問 # 107
When gathering information, it is important to ask about the customer's goals because the
- A. integrator needs an understanding of what the customer expects to beable to do with the space.
- B. customer may be planning on moving before the project is complete.
- C. integrator needs to confirm they understand the relationship between desires and budget
- D. customer may have unrealistic expectations of what can be done.
正解：A
解説：
Understanding the customer's goals is crucial because it helps the integrator design a solution that meets the customer's expectations and functional requirements. Knowing what the customer expects to achieve with the space allows the integrator to tailor the AV system to those needs, ensuring satisfaction and effective use of the system. This understanding also helps in aligning the project scope with the customer's vision and can prevent misunderstandings and misalignments later in the project.
質問 # 108
Remotely monitoring system health of a deployed conference room and rebooting it when faulty is an example of
- A. troubleshooting.
- B. proactive maintenance.
- C. a service call.
- D. a service contract.
正解：B
解説：
Proactive maintenance involves regularly monitoring and maintaining systems to prevent issues before they occur. Remotely monitoring system health and performing actions like rebooting faulty equipment are preventive measures that help maintain system reliability and functionality. This approach reduces the likelihood of system failures and downtime, ensuring that the conference room equipment operates smoothly.
質問 # 109
Which of the following is the BEST placement for studio monitor loudspeakers in a 4 m x 6 m room from an acoustic standpoint?
- A. Setup A
- B. Setup B
- C. Setup C
- D. Setup D
正解：B
解説：
In Setup B, the speakers are positioned symmetrically at ear level and angled towards the listener, which is the optimal configuration for achieving accurate sound reproduction and a balanced stereo image. In a small studio or listening environment, placing the speakers near the front wall and aimed directly at the listener minimizes acoustic issues such as reflections and standing waves. This setup maximizes direct sound while reducing unwanted room interactions.
CTS Technology Specialist ReferenceAccording to CTS guidelines on sound reinforcement and speaker placement, monitor speakers should be positioned symmetrically and at ear level to ensure the best listening experience. Proper speaker placement enhances audio clarity and accuracy, which is essential for environments like studios and classrooms where sound quality is paramount.
質問 # 110
A task cannot begin before another task is completed. How is this described in a project task schedule?
- A. consequence
- B. dependency
- C. determination
- D. requirement
正解：B
解説：
A dependency in a project task schedule describes a situation where a task cannot begin before another task is completed. Dependencies ensure that tasks are performed in the correct order to maintain the workflow and project timeline. Axis Technology Specialist documentation highlights the importance of identifying and managing dependencies to ensure smooth project execution and avoid delays.
質問 # 111
According to the AVIXA Rack Design standard, what should be the MINIMUM distance between an AC Power cable and a Data Twisted Pair cable?
- A. 50 mm (-2 in)
- B. 100 mm (~4 in)
- C. 300 mm (~12 in)
- D. 25 mm (~1 in)
正解：B
解説：
According to AVIXA standards for rack design, there should be a minimum distance of 100 mm (approximately 4 inches) between AC power cables and data twisted pair cables. This spacing helps to reduce the potential for electromagnetic interference (EMI) between power and data cables, ensuring signal integrity and reducing noise.
CTS Technology Specialist ReferenceThe AVIXA standards emphasize proper cable management to minimize interference in AV installations. Maintaining a 100 mm separation aligns with best practices for reducing crosstalk and preserving data quality in networked systems.
質問 # 112
As part of a service agreement offering, wfwt PRIMARY role do preventive maintenance visits (PM/PMV) play?
- A. allows the AV provider tosell a service that is often forgotten by the customer, and therefore generate greater profit
- B. allows the AV provider access to client premises and scope future work
- C. allows the AV provider toclean, service and assess equipment In the field on a regular basis
- D. allows the AV provider to check in with customer and serves as an opportunity to sell further solutions
正解：C
解説：
Preventive maintenance visits (PM/PMV) are primarily designed to ensure that equipment is functioning correctly and to prevent potential failures. This involves cleaning, servicing, and assessing the equipment regularly to maintain optimal performance and longevity. This is in line with industry standards for preventive maintenance, ensuring reliability and reducing downtime.
質問 # 113
In the scope of work (SOW), an interface is described as being installed in the lectern. While the work is underway onsite, the client asks for the interface to be moved to a table next to the lectern. What is the proper response from the technician?
- A. Advise the project manager of the request.
- B. Advise the client that moving the interface is out of the scope and install the interface in the lectern.
- C. Follow the direction of the client, making a note in the job diary.
- D. Follow the direction of the client and advise the project manager of the change.
正解：A
解説：
If a client requests a change to the scope of work, such as relocating equipment, the technician should advise the project manager. This ensures that the request is documented and assessed for impact on the project scope, budget, and timeline, maintaining proper project management protocols.
CTS Technology Specialist ReferenceAccording to CTS standards, scope changes should be communicated to project management to ensure appropriate adjustments and approvals are made.
質問 # 114
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