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Which Class of Fires involves ordinary combustible materials such as paper, wood and cloth?
A. Class A
B. Class K
C. Class B
D. Class D
正解：A
解説：
According to the CDCP Preparation Guide, Class A fires involve ordinary combustible materials such as paper, wood and cloth. These materials leave behind ash or embers when they burn. Class A fires can be extinguished by water or other cooling agents that reduce the temperature of the fuel below its ignition point.
References: CDCP Preparation Guide, page 30. Basics of Fire Protection in a Data Center. 3 Levels of Data Center Fire Protection Standards. Three Levels of Data Center Fire Protection.
質問 # 23
Which one of the following is a core objective of a Business Value in an organization?
A. Reducing Costs
B. None of the above
C. Increasing Sales
D. Reducing the Deficit
正解：B
解説：
According to the EPI Data Centre Professional (CDCP®) Reference Materials, a core objective of a Business Value in an organization is to create value for customers and stakeholders1. This means delivering products or services that meet or exceed customer expectations, while also generating profits or benefits for the organization and its shareholders. Reducing costs, reducing the deficit, and increasing sales are possible ways to achieve this objective, but they are not the core objective itself.
References: 1: EPI Data Centre Professional (CDCP®) Reference Materials, page 9.
質問 # 24
Which type of Fire Detection Device is recommended for protecting a Data Center?
A. None of the above
B. Smoke detector
C. Heat detector
D. Flame detector
正解：B
解説：
According to the CDCP® Preparation Guide, smoke detectors are the most common type of fire detection devices used in data centers, as they can detect a fire in its early stages and provide early warning to the occupants and authorities. Smoke detectors can be either spot-type or air-aspirating, depending on the design and goals of the data center. Spot-type detectors are inexpensive and simple, but may cause activation delay and false alarms. Air-aspirating detectors are more sensitive and reliable, but may require more maintenance and installation costs. Both types of detectors should be installed in accordance with the relevant standards and codes, such as NFPA 72 and EN 54.
References: CDCP® Preparation Guide, page 30-31. Evaluating Fire Detection Options For Data Centers. Fire Detection and Suppression Systems in a Data Center.
質問 # 25
What is the best practice for cutting holes in the raised floor tile?
A. Anywhere as data centre tiles are designed to allow cut-outs anywhere.
B. Draw a cross on the tile and when making a cut-out do not touch a line and avoid the corners.
C. Draw a line in the middle of the tile and never touch the line when making the cut.
D. Cut the tiles at the corner so the pedestals can be used as a vertical cable manager.
正解：B
解説：
According to the Raised Floor Installation Manual, the best practice for cutting holes in the raised floor tile is to draw a cross on the tile and when making a cut-out do not touch a line and avoid the corners1. This ensures that the structural integrity and load-bearing capacity of the tile are not compromised. Cutting holes anywhere, touching the line, or cutting the corners can weaken the tile and cause it to crack or collapse1. Additionally, the manual recommends using a drill press or a reciprocating saw with a metal or bi-metal cutting blade, and deburring all sharp edges1.
References: 1: Raised Floor Installation Manual, E. Recommended Cutting Tools, Page 1
質問 # 26
The temperature and humidity values indicated on the display of the Computer room air conditioner unit are the values measured at which point?
A. It is the value measured at the intake of the air conditioner.
B. It is the value measured at the exhaust (outlet) of the air conditioner.
C. It is the average value between the intake and exhaust (outlet) of the air conditioner.
D. It is the value measured at the front of the rack of the aisle the air conditioner is situated.
正解：A
解説：
According to the IBM document on temperature and humidity design criteria1, the temperature and humidity values indicated on the display of the computer room air conditioner unit are the values measured at the intake of the air conditioner. This is because the intake is where the air conditioner draws the air from the computer room and cools and dehumidifies it before sending it back to the computer room. The display shows the current conditions of the computer room air, which are used to adjust the cooling and dehumidifying operations of the air conditioner. The values measured at the exhaust (outlet) of the air conditioner are not displayed, as they are not relevant for the computer room environment. The values measured at the front of the rack of the aisle the air conditioner is situated are also not displayed, as they may vary depending on the distance and location of the rack. The average value between the intake and exhaust (outlet) of the air conditioner is not displayed, as it does not reflect the actual conditions of the computer room air or the air conditioner performance.
References: 1: Temperature and humidity design criteria - IBM
質問 # 27
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