信頼できるEPI Data Centre CDCP問題集PDF 2026年01月15日最近更新された問題
必ず合格できるEXIN CDCP試験正確な90問題と解答あります
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質問 # 27
Which type of Humidifier is composed of water-filled canister containing electrodes?
- A. Infrared Humidifiers
- B. Steam Canister Humidifier
- C. Ultrasonic Humidifier
- D. Water Canister Humidifier
正解：B
解説：
A steam canister humidifier is a type of humidifier that uses electricity to heat water in a canister containing electrodes. The water conductivity and the water level determine the amount of current and steam production.
The steam canister humidifier is also known as an electrode boiler humidifier or an electrode steam humidifier123.
References: 1: EPI Data Centre Professional (CDCP®) Reference Materials, page 192: Electrode and resistive type humidifiers compared | steamovap technologies inc3: Know-How | Electrode Steam Humidifier - Condair Group.
質問 # 28
Which one of the following is an Audible Signaling and Notification Device?
- A. Alarms
- B. Sirens
- C. Strobes
- D. Clocks
正解：B
解説：
According to the CDCP® Preparation Guide, an audible signaling and notification device is a device that produces a sound to alert or notify the occupants of a data center of an event or condition. Sirens are examples of such devices, as they can emit loud and distinctive tones to warn of fire, emergency, or security incidents.
Strobes, on the other hand, are visual signaling and notification devices that produce flashes of light to attract attention or convey information. Alarms and clocks are not specific types of devices, but rather general terms that can refer to various audible or visual devices.
References: CDCP® Preparation Guide, page 30. Audible Visual Notification | System Sensor | Honeywell.
Audible-Visual Signaling Devices - AutomationDirect.
質問 # 29
When dealing with glass door racks, cool air is injected into the rack from:
- A. The bottom of the rack.
- B. The top of the rack through the fans and vents mounted inside the rack.
- C. The rear door in a downflow direction.
- D. The front door in a downflow direction.
正解：C
解説：
Glass door racks are a type of rack that have solid glass front doors and rear door heat exchangers (RDHx).
RDHx are devices that use facility coolant to absorb heat from the exhaust air of the IT equipment and return cool air to the room. RDHx can be either passive or active, depending on the fan configuration. In general, IT hardware within the rack is air-cooled and the door heat exchanger uses facility coolant to absorb heat from exhaust air to return air to the facility at or near inlet air temperature to the rack. This rear door heat exchanger can either be a passive or active solution. When dealing with glass door racks, cool air is injected into the rack from the rear door in a downflow direction. This means that the cool air flows from the top to the bottom of the rack, following the natural convection of the hot air rising. This way, the cool air can reach all the IT equipment in the rack and prevent hot spots or overheating.
References: [SOLVED] Rack - Solid or Mesh front door? - Data Center
IT](https://community.spiceworks.com/topic/510677-rack-solid-or-mesh-front-door), ChilledDoor, Rear Door Heat Exchanger | Data Center Cooling, ACS Door Heat Exchanger Requirements for Open Rack.
質問 # 30
What is the most cost-effective way to avoid EMF issues within the Computer room?
- A. Reducing the temperature in computer room to 18° C / 64= Fahrenheit
- B. Reducing the voltage in the computer room
- C. Install TUVapp'oved shielding material
- D. Create a distance between the EMF source and the ICT equipment / copper network cabling
正解：D
解説：
Physical separation is the most cost-effective method to minimize electromagnetic interference. Specialized shielding is more expensive and usually unnecessary if proper separation is maintained.
References:
CDCP Exam Preparation Guide, EMF Section
質問 # 31
What are the four main components of a refrigeration circuit?
- A. Thermostat, monitoring interface, indoor unit, outdoor unit
- B. Condenser, expansion valve, buffer tank, de-icing unit
- C. Evaporator, compressor, condenser, expansion valve
- D. Evaporation, membrane filter, monitor sensor, pressure valve
正解：C
解説：
The four main components of a refrigeration circuit are the evaporator, the compressor, the condenser, and the expansion valve, according to the CDCP Preparation Guide1 and various web sources234. A refrigeration circuit is a system that transfers heat from a low-temperature region to a high-temperature region, using a working fluid called refrigerant. The refrigeration circuit operates in a closed loop, where the refrigerant changes its state from liquid to vapor and back to liquid, while absorbing and releasing heat. The four main components of the refrigeration circuit perform the following functions:
*The evaporator is a heat exchanger that absorbs heat from the low-temperature region, such as the data centre room, and transfers it to the refrigerant. The refrigerant enters the evaporator as a low-pressure, low-temperature liquid, and leaves the evaporator as a low-pressure, low-temperature vapor.
*The compressor is a mechanical device that increases the pressure and temperature of the refrigerant vapor.
The refrigerant enters the compressor as a low-pressure, low-temperature vapor, and leaves the compressor as a high-pressure, high-temperature vapor.
*The condenser is another heat exchanger that releases heat from the refrigerant to the high-temperature region, such as the outside air or water. The refrigerant enters the condenser as a high-pressure, high-temperature vapor, and leaves the condenser as a high-pressure, low-temperature liquid.
*The expansion valve is a device that reduces the pressure and temperature of the refrigerant liquid. The refrigerant enters the expansion valve as a high-pressure, low-temperature liquid, and leaves the expansion valve as a low-pressure, low-temperature liquid. The expansion valve also controls the flow of the refrigerant into the evaporator, depending on the cooling load.
References:
1: CDCP Preparation Guide, page 19, section 2.3.3 2: The Refrigeration Cycle5, page 1, section 1 3:
Fundamentals of Cooling in Data Center6, page 1, section 1 4: The Refrigeration System, Its Four Main Components, And Their Functions7, page 1, section 1
質問 # 32
When having two non-synchronized power sources, the ATS / STS need to be of the type:
- A. Break before make.
- B. Make before break.
- C. Both make before break or break before make can be used.
- D. Both an ATS and STS can never handle two non-synchronized sources.
正解：A
解説：
When having two non-synchronized power sources, the ATS / STS need to be of the type break before make, which means that the switch disconnects from one source before connecting to the other source. This prevents any short circuit, back feed, or phase mismatch that could occur if the two sources were connected simultaneously. Break before make switches are also known as open transition switches, because they create a brief interruption in the power supply during the switching process. This interruption is usually acceptable for most ICT equipment, as they have internal power supplies or batteries that can handle the transient. However, if the interruption is not acceptable, then the two power sources need to be synchronized before switching, which requires a make before break switch, also known as a closed transition switch. Make before break switches connect to the second source before disconnecting from the first source, which ensures a seamless transfer of power without any interruption. However, make before break switches require that the two sources have the same voltage, frequency, and phase, which can be achieved by using a synchronization module or a phase-locked loop.
References:
1: CDCP Preparation Guide, page 17, section 2.3.1 2: STS in data centres - Borri3, page 1, section 1 4: Using Static Transfer Switches to Enhance Data Center ... - Donwil5, page 1, section 1 6: What is an Automatic Transfer Switch (Power)? | Ethan Banks7, page 1, section 1
質問 # 33
is the degree to which a system or component is operational and accessibility when required for use.
- A. Reliability
- B. Availability
- C. Scalability
- D. Agility
正解：B
解説：
Availability is the degree to which a system, product or component is operational and accessible when required for use. It is one of the attributes of reliability, which is the ability of a system or component to perform its required functions under stated conditions for a specified period of time. Availability can be calculated as the ratio of the expected value of the uptime (the time when the system is functional) to the total time (uptime plus downtime) of a system or component. Availability can also be influenced by factors such as maintainability, fault tolerance, redundancy, diagnostics, and logistics.
References: EPI Data Centre Professional (CDCP®) Preparation Guide, page 8; Availability - Wikipedia; Reliability - ISO 25000.
質問 # 34
What is the best practice for cutting holes in the raised floor tile?
- A. Cut the tiles at the corner so the pedestals can be used as a vertical cable manager.
- B. Draw a line in the middle of the tile and never touch the line when making the cut.
- C. Anywhere as data centre tiles are designed to allow cut-outs anywhere.
- D. Draw a cross on the tile and when making a cut-out do not touch a line and avoid the corners.
正解：D
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 # 35
The termination of the ability of a product to perform its required function can be defined as.
- A. Termination
- B. Hindrance
- C. Failure
- D. Obstacle
正解：C
解説：
According to the EPI Data Centre Professional (CDCP) Preparation Guide, failure is defined as "the termination of the ability of a product to perform its required function" (page 9). Failure can occur due to various reasons, such as wear and tear, design flaws, human errors, environmental factors, or external events.
Failure can affect the availability, reliability, and performance of a product, system, or service.
References:
*EPI Data Centre Professional (CDCP) Preparation Guide, page 9
*What is Failure? | Definition from WhatIs.com
質問 # 36
Which one of the following is an Audible Signaling and Notification Device?
- A. Alarms
- B. Sirens
- C. Strobes
- D. Clocks
正解：B
解説：
According to the CDCP Preparation Guide, an audible signaling and notification device is a device that produces a sound to alert or notify the occupants of a data center of an event or condition. Sirens are examples of such devices, as they can emit loud and distinctive tones to warn of fire, emergency, or security incidents.
Strobes, on the other hand, are visual signaling and notification devices that produce flashes of light to attract attention or convey information. Alarms and clocks are not specific types of devices, but rather general terms that can refer to various audible or visual devices.
References: CDCP Preparation Guide, page 30. Audible Visual Notification | System Sensor | Honeywell.
Audible-Visual Signaling Devices - AutomationDirect.
質問 # 37
Which Class of Fire involves combustible metals or combustible metal alloys such as magnesium, sodium and potassium?
- A. Class C
- B. Class D
- C. Class A
- D. Class B
正解：B
解説：
Class D fires involve combustible metals or combustible metal alloys such as magnesium, sodium and potassium. These metals can react violently with water, air, or other chemicals, and require special extinguishing agents1 References: 1: EPI Data Centre Professional (CDCP®) Reference Materials, page 16.
質問 # 38
Sprinkler heads used in computer rooms activate at what temperature?
- A. 70 C (158 °F)
- B. 57 °C (135 °F)
- C. 27 °C (81 °F)
- D. Only on direct contact with a flame
正解：B
解説：
Sprinkler heads used in computer rooms activate at 57 °C (135 °F), which is the standard temperature rating for ordinary sprinklers. This is the temperature at which the heat-sensitive element of the sprinkler head, such as a glass bulb or a fusible link, breaks or melts, allowing water to flow from the sprinkler. Sprinkler heads are designed to activate only when exposed to a fire, not to ambient temperature fluctuations. Therefore, sprinkler heads should be installed at a sufficient distance from the heat sources, such as servers, racks, or ducts, to avoid accidental activation. Sprinkler heads should also be selected and installed in accordance with the relevant standards and codes, such as NFPA 13 and NFPA 75.
References:
1: CDCP Preparation Guide, page 24, section 2.4.3 2: Sprinkler Systems in Data Centers3, page 1, section 1 4:
Data Center Fire Protection5, page 1, section 2 6: Data Center Sprinkler System Design7, page 1, section 1
質問 # 39
What is the main advantage of busbar trunking compared to stand electrical cabling?
- A. Busbar trunking allows for flexibility.
- B. Busbar trunking is less expensive.
- C. Busbar trunking has a fixed power rating.
- D. Busbar trunking can be located both overhead and under the raised floor.
正解：A
解説：
Busbar trunking systems are a method of power distribution using rigid copper or aluminium conductors to distribute the power around a building. Busbar trunking systems have many advantages over cables, such as lower space requirements, higher short-circuit strength, lower fire load, and easier installation. One of the main advantages of busbar trunking is that it allows for flexibility in terms of power transmission and distribution.
Busbar trunking systems can be easily relocated, modified, or expanded to accommodate changes in the building layout or load demand. Busbar trunking systems can also be fitted with various components, such as tap-off units, elbows, tees, and end feed units, to provide power to different locations and consumers. Busbar trunking systems can also be installed both overhead and under the raised floor, depending on the design and preference of the building.
References: Why I prefer busbar trunking systems more than cables | EEP, Why should you choose Busbar over Cable? - E+I Eng, Busbar VS Cables for Riser Applications - An Electrical Engineer.
質問 # 40
What is the current recommended temperature for ICT equipment as described in the ASHREA TC 9.9 guideline?
- A. 18-27 C (64.4 - 80.6°F)
- B. 8-18 C (46.4 -64.4 °F)
- C. 25-45 °C (77 - 113 °F)
- D. 20-40 °C (68 - 104 °F)
正解：A
解説：
The current recommended temperature for ICT equipment as described in the ASHRAE TC 9.9 guideline is
18-27 C (64.4 - 80.6°F). This is the recommended range for the dry-bulb temperature at the inlet of the servers, which is the most critical parameter for ensuring the optimal performance and reliability of the ICT equipment. The recommended range is based on the thermal specifications of the majority of the ICT equipment in the market, as well as the energy efficiency and environmental considerations of the data centre cooling systems. The recommended range is suitable for Classes A1 to A4 of the ASHRAE thermal guideline classes, which cover different types and generations of ICT equipment.
References:
1: 2021 Equipment Thermal Guidelines for Data Processing Environments - ASHRAE2, page 1, Table 2.1 3:
ASHRAE TC9.9 Data Center Power Equipment Thermal Guidelines and Best Practices4, page 10, section 2.1
5: Does your Data Center Follow ASHRAE TC 9.9 Thermal Guidelines for Data Processing Environments?6, page 1, section 1
質問 # 41
What should be a consideration when having casters (rollers/wheels) or feet under the rack?
- A. The casters and feet should be larger to avoid a too heavy point load on the floor tile.
- B. Skirts at the bottom of the rack to avoid air flow between the hot and cold aisles.
- C. Casters and feet should be of a soft material, for example rubber, to avoid damage to the raised floor tile.
- D. Casters and feet should not be locked to ensure the racks are still able to be moved to another position.
正解：A
解説：
The casters and feet under the rack are used to support the weight of the rack and its equipment, and to allow the rack to be moved if needed. However, the casters and feet should also be designed to avoid putting too much pressure on the floor tile, especially if the data centre uses a raised floor system. A too heavy point load on the floor tile can cause the tile to crack, deform, or collapse, which can damage the rack, the equipment, and the underlying infrastructure. To prevent this, the casters and feet should be larger, so that they can distribute the weight over a larger area and reduce the point load. The casters and feet should also be compatible with the floor type and the load rating of the floor tile.
References:
1: CDCP Preparation Guide, page 22, section 2.4.1.1 2: Raised Floor Design Considerations for Data Center3, page 1, section 1 4: [SOLVED] server rack on casters or feet5, page 1, section 1
質問 # 42
Which formula is correct?
- A. Volt-Ampere = Watt * Power Factor
- B. Power Factor = Volt Ampere ' Watt
- C. Watt = VoIt-Ampere / Power Factor
- D. Watt = Volt-Ampere * Power Factor
正解：D
質問 # 43
Cost of Downtime can be classified as.
- A. Up and Down
- B. Classified and Declassified
- C. Mean and Median
- D. Direct and Indirect
正解：D
解説：
Cost of downtime is the total amount of money lost due to a data centre outage or disruption. It can be classified into two categories: direct and indirect. Direct costs are the immediate and measurable expenses incurred during or after an outage, such as lost revenue, lost productivity, recovery costs, compensation costs, penalties, etc. Indirect costs are the long-term and intangible impacts of an outage, such as reputation damage, customer dissatisfaction, loss of market share, legal liabilities, etc. Both direct and indirect costs can vary depending on the type, duration, and severity of the outage, as well as the industry, size, and location of the data centre.
References:
*EPI Data Centre Training Framework1
*EPI Data Centre Competence Framework2
*Understanding the Cost of Data Center Downtime3
*Uptime Institute's 2022 Outage Analysis Finds Downtime Costs and Consequences Worsening
*[INFOGRAPHIC] The Cost of Downtime: 21 Stats You Need to Know
質問 # 44
What is a requirement for both CCTV cameras and recording equipment?
- A. Both must be connected to a UPS.
- B. CCTV cameras can only be used to cover the outside of the building, where as the recording equipment needs to be located in a secure area.
- C. They must be of the same brand.
- D. Both must be placed inside the Computer room.
正解：A
解説：
A UPS (Uninterruptible Power Supply) is a device that provides backup power to electrical equipment in case of a power outage or fluctuation. A UPS is essential for both CCTV cameras and recording equipment, as it ensures that the surveillance system can continue to operate and record without interruption or data loss. A UPS can also protect the CCTV cameras and recording equipment from damage caused by power surges or spikes. Connecting both CCTV cameras and recording equipment to a UPS is a requirement for data centres, as it enhances the security and reliability of the surveillance system.
References: Technical Specification - GeM, [What is a UPS? | Uninterruptible Power Supply | APC by Schneider Electric], [Why You Need a UPS for Your CCTV System - CCTV Camera World].
質問 # 45
What is a requirement of an FM200 (HFC-227) installation?
- A. Install the gas containers (tanks) close to the data centre.
- B. It is a high-pressure gas; therefore nozzles must be mounted with two brackets.
- C. Install pre-action sprinklers in the same room as the FM200.
- D. Drainage system under the raised floor.
正解：B
解説：
FM200 (HFC-227) is a clean agent fire suppression system that uses a high-pressure gas to extinguish fires by reducing the oxygen concentration and absorbing the heat. FM200 is stored in cylinders at pressures of up to
42 bar (600 psi) and is released through nozzles into the protected area. Because of the high pressure, the nozzles must be mounted with two brackets to prevent them from moving or breaking during discharge. The brackets must be securely attached to the ceiling or wall and aligned with the nozzle outlet. The nozzle outlet must also be free of any obstructions that could affect the discharge pattern or distribution.
References:
*EPI Data Centre Professional (CDCP®) Preparation Guide, page 32
*FSL-227 Technical Manual, page 10
*Firetrace ILP Manual, page 21
質問 # 46
How many monitoring points should be used in Temperature Measurement?
- A. 0
- B. 1
- C. 2
- D. 3
正解：B
解説：
According to the EPI Data Centre Professional (CDCP) Reference Materials, the recommended number of monitoring points for temperature measurement in a data centre is 3 per rack: one at the top, one at the middle, and one at the bottom1. This is to ensure that the temperature distribution within the rack is uniform and within the acceptable range for the equipment. The temperature sensors should be placed at the front of the rack, where the air enters the equipment, and not at the back, where the hot air exits1.
References: 1: EPI Data Centre Professional (CDCP) Reference Materials, page 23.
質問 # 47
Which one of the following is an example of Direct Cost?
- A. Reduced customer satisfaction
- B. Negative public relations
- C. Legal fees
- D. Damaged brand perception
正解：C
解説：
Legal fees are an example of direct cost because they can be directly attributed to a specific project, product, or service. Legal fees are incurred for the purpose of obtaining legal advice, drafting contracts, resolving disputes, or complying with regulations related to the core business activity. Legal fees are not general overhead expenses that are shared by multiple cost objects.
References: EPI Data Centre Training Framework, CDCP Preparation Guide, Direct Cost - Overview, Examples, Tax Implications
質問 # 48
By what are magnetic fields of the type 'H' or 'B' created?
- A. Magnetic fields are created when an electric current flows; the greater the current, the stronger the magnetic field.
- B. Magnetic fields are created by voltage; the greater the voltage, the stronger the magnetic field.
- C. Magnetic fields are created by the magnetic flux of the earth which varies per month.
- D. Magnetic fields are created when there is a high level of common mode noise (CMN); the greater the common mode noise (CMN), the stronger the magnetic field.
正解：A
解説：
According to the CDCP Preparation Guide1, magnetic fields of the type 'H' or 'B' are created when an electric current flows through a conductor, such as a wire or a coil. The magnetic field strength 'H' is proportional to the current 'I' and the number of turns 'N' of the coil, and inversely proportional to the length
'l' of the coil. The magnetic flux density 'B' is proportional to the magnetic field strength 'H' and the permeability '' of the medium in which the magnetic field exists. The greater the current, the stronger the magnetic field and the magnetic flux density. The relationship between 'H', 'B', 'I', 'N', 'l', and '' can be expressed by the following equations:
H = N I / l
B =H
References:
1: CDCP Preparation Guide, page 23, section 2.4.2.1 2: Difference between B and H in magnetic fields?3, page 1, section 1 4: Magnetic field | Definition & Facts5, page 1, section 1
質問 # 49
Which design consideration should be implemented with an Inergen-based fire suppression system?
- A. Pressure relief valves are required in the room that needs protection.
- B. Install the gas containers (tanks) close to the data centre.
- C. To use Inergen only for fires which are not related to electrical power.
- D. Install protective covers around the nozzles to avoid accidental gas dumps.
正解：A
解説：
A design consideration that should be implemented with an Inergen-based fire suppression system is to install pressure relief valves in the room that needs protection. Inergen is a clean agent fire suppression system that uses a mixture of inert gases (nitrogen, argon, and carbon dioxide) to displace the oxygen in the room and extinguish the fire. However, when Inergen is released into the room, it creates a sudden increase in pressure, which can damage the walls, doors, windows, and ceilings of the room. To prevent this, pressure relief valves are required to vent the excess pressure to the outside and maintain a safe pressure level inside the room.
Pressure relief valves should be designed and installed in accordance with the relevant standards and codes, such as NFPA 2001 and ISO 14520.
References:
1: CDCP Preparation Guide, page 24, section 2.4.3 2: Data Center Fire Suppression Systems Bring Unexpected Risk3, page 1, section 1 4: Inergen from Fire Eater - CSC Datacenter5, page 1, section 1 6:
Inergen Fire Suppression System7, page 1, section 1
質問 # 50
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2026年最新の実際にある検証済みのCDCP問題集：https://www.passtest.jp/EXIN/CDCP-shiken.html
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