CDCPブレーン問題集PDF、EXIN CDCP試験問題豪華お試しセット
2025年最新されたCDCPサンプル問題は信頼され続けるCDCPテストエンジン
EXIN CDCP 認定試験の出題範囲：
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質問 # 15
is the arithmetic mean of time between the failing and the subsequent running of the system in a particular time period.
- A. MTTR
- B. MLBF
- C. MCBF
- D. MTBF
正解：D
解説：
MTBF stands for Mean Time Between Failures, and it is the arithmetic mean of time between the failing and the subsequent running of the system in a particular time period. MTBF is a measure of reliability that indicates how often a system or component fails during its operation. MTBF can be calculated by dividing the total operating time by the number of failures over a given period. For example, if a system operates for 1000 hours and experiences 5 failures, the MTBF is 1000/5 = 200 hours.
References: EPI Data Centre Training Framework, CDCP Preparation Guide, MTBF, MTTR, MTTF, MTTA:
Understanding incident metrics - Atlassian
質問 # 16
Which type of Humidifier is composed of water-filled canister containing electrodes?
- A. Ultrasonic Humidifier
- B. Water Canister Humidifier
- C. Steam Canister Humidifier
- D. Infrared Humidifiers
正解：C
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 # 17
Do I need to check the local standards if I already comply to international standards?
- A. Compliance to only international standards is good enough as most local standards are derived from international standards.
- B. You need to check the local standards to ensure compliance to these standards.
- C. Data centres only need to comply to international standards since they are connected to a worldwide international network infrastructure.
- D. Local standards do not to be checked as some countries have too many local standards, which will slow down the data centre construction.
正解：B
解説：
Data centre design and infrastructure standards can vary from country to country, depending on the local regulations, codes, and practices. Therefore, it is important to check the local standards before designing, building, or operating a data centre in a specific location. Compliance to only international standards may not be sufficient or adequate to meet the local requirements, which could result in legal, financial, or operational risks. For example, some countries may have stricter fire safety, environmental, or energy efficiency standards than the international ones. Some countries may also have different electrical standards, such as voltage, frequency, or plug types. By checking the local standards, you can ensure that your data centre is compliant, safe, and efficient in the local context.
References:
1: Data Center Design: Which Standards to Follow?2, page 1, section 1 3: The Most Important Data Center Design and Infrastructure Codes and Standards4, page 1, section 1 5: Explaining the new family of ISO Data Centre Standards6, page 1, section 1 7: Standards for data centre certification. Is a changing coming?8, page 1, section 1
質問 # 18
Which one of the following is a device that uses circulating chilled water to remove heat?
- A. Computer Room Air System Unit (CRAS)
- B. Computer Room Air Suspension Unit (CRAS)
- C. Computer Room Air Handling Unit (CRAH)
- D. Computer Room Air Suppression Unit (CRAS)
正解：C
解説：
A computer room air handling unit (CRAH) is a device that uses circulating chilled water to remove heat from the data center environment. A CRAH consists of a fan, a coil, and a filter. The fan draws the warm air from the data center and passes it through the coil, where the heat is transferred to the chilled water. The chilled water is supplied by a chiller or a cooling tower, and the cooled air is returned to the data center. A CRAH is different from a computer room air conditioning unit (CRAC), which uses a refrigerant instead of chilled water to cool the air.
References:
*EPI Data Centre Professional (CDCP®) Preparation Guide, page 36
*Chilled Water Systems: Applications and Common Uses
*The Principles of Basic Refrigeration: What is a chiller?
質問 # 19
Which one of the following is an Objective of Data Center Fire Protection?
- A. Representation
- B. Depression
- C. Suppression
- D. Information
正解：C
解説：
The objective of data center fire protection is to suppress or extinguish a fire before it can cause significant damage to the equipment, personnel, or business continuity. Fire suppression systems are designed to reduce the heat, oxygen, or fuel elements of the fire triangle, and to limit the spread of fire and smoke. Fire suppression systems can be classified into two types: water-based and gas-based. Water-based systems include sprinklers, mist, and water spray systems, which use water as the extinguishing agent. Gas-based systems include inert gas, halocarbon, and clean agent systems, which use gases or chemicals as the extinguishing agent. The choice of fire suppression system depends on several factors, such as the fire risk, the type of fuel, the environmental impact, the reliability, the cost, and the compatibility with the data center equipment and operations.
References:
*EPI Data Centre Professional (CDCP®) Preparation Guide, page 31
*A Comprehensive Approach To Data Center Fire Safety
質問 # 20
Which one of the following represents the three elements (oxygen, heat and fuel) to interact in order for the fire to exist?
- A. The Fire Class
- B. The Fire Technology
- C. The Fire Hexagon
- D. The Fire Triangle
正解：D
解説：
The fire triangle is a simple model that illustrates the three elements a fire needs to ignite: heat, fuel, and an oxidizing agent (usually oxygen). A fire naturally occurs when the elementsare present and combined in the right mixture. A fire can be prevented or extinguished by removing any one of the elements in the fire triangle.
References: EPI Data Centre Professional (CDCP®) Preparation Guide, page 9; Fire triangle - Wikipedia; The Fire Triangle Explained - Fire Action
質問 # 21
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. Create a distance between the EMF source and the ICT equipment / copper network cabling
- C. Reducing the voltage in the computer room
- D. Install TUVapp'oved shielding material
正解：B
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 # 22
Which one of the following is an example of Direct Cost?
- A. Negative public relations
- B. Reduced customer satisfaction
- 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 # 23
Which type of Humidifier suspends quartz lamps over an open pool of water?
- A. Infrared Humidifiers
- B. Ultrasonic Humidifier
- C. Steam Canister Humidifier
- D. Water Canister Humidifier
正解：A
解説：
Infrared humidifiers are a type of humidifier that use quartz lamps to heat water in an open pool and evaporate it into the air. They are energy-intensive and require frequent maintenance and cleaning. They are not recommended for data centers, as they can introduce contaminants and bacteria into the air, and increase the risk of fire and electrical hazards.
References: EPI Data Centre Training Framework, CDCP Preparation Guide, Make Humidification Adjustments | ENERGY STAR
質問 # 24
Looking from within the Computer room, what should the door-swing (opening) direction be?
- A. Instead of swinging doors, sliding doors are preferred
- B. Outwards, code permitted
- C. Depends on the type of Computer room
- D. Inwards, code permitted
正解：B
解説：
For safety and emergency egress, doors should swing outwards (towards the exit). This is a common building code and best practice in data centers.
References:
CDCP Exam Preparation Guide, Security and Safety
質問 # 25
Which one of the following is an AC Power Quality Anomaly?
- A. Backup Condition
- B. Waveform Distortion
- C. Signal Distortion
- D. Attenuation
正解：B
解説：
Waveform distortion is a type of AC power quality anomaly that occurs when the shape of the voltage or current waveform deviates from the ideal sinusoidal shape. Waveform distortion can be caused by nonlinear loads, such as rectifiers, inverters, variable frequency drives, and electronic devices, that draw current in pulses or harmonics. Waveform distortion can result in overheating, reduced efficiency, malfunctioning, or damage of equipment.
References: EPI Data Centre Training Framework, CDCP Preparation Guide, 5 anomalies in AC power that can damage your home devices, 9 Most Common Power Quality Problems
質問 # 26
is the ability of a system or component to perform its required functions under stated conditions for a specified period of time.
- A. Scalability
- B. Availability
- C. Agility
- D. Reliability
正解：D
解説：
According to the IEEE definition, reliability is the ability of a system or component to perform its required functions under stated conditions for a specified period of time. Reliability is a measure of how often a system or component fails, and how long it takes to recover from a failure. Reliability is closely related to availability, which is the degree to which a system or component is operational and accessible when required for use. Reliability and availability are both affected by factors such as design, maintenance, testing, and environmental conditions.
References: EPI Data Centre Training Framework, CDCP Preparation Guide, Reliability engineering - Wikipedia
質問 # 27
An optical fiber cable comes with the specifications 50/125 um.
What do the numbers represent?
- A. The first number represents the required distance to single-phase power cabling; the second number represents the required distance to three-phase cabling.
- B. The first number represents the diameter of the core; the second number represents the actual diameter cable including the buffer and jacket.
- C. The first number represents the diameter of the core; the second number represents the diameter of the cladding in microns.
- D. The first number represents the distance for a 10 Gb/s connection; the second number represents the distance for a 1 Gb/s connection.
正解：C
解説：
Optical fiber cables are composed of a core, a cladding, and a coating. The core is the central part of the fiber that carries the light signal. The cladding is the layer surrounding the core that reflects the light back into the core and prevents signal loss. The coating is the protective layer that covers the cladding and provides mechanical strength and environmental protection. The specifications of an optical fiber cable indicate the dimensions of the core and the cladding in microns (#m), which are one millionth of a meter. For example, a
50/125 #m cable has a core diameter of 50 #m and a cladding diameter of 125 #m. The coating diameter is usually 250 #m, but it is not part of the specifications.
References: Multimode Optical Fiber Selection & Specification - Corning, Optical Fiber OM3 (50/125µm Multimode Fiber), 50/125 Graded-Index OM2 Optical Fiber - OFS
質問 # 28
What is the effect of a high relative humidity in the data centre?
- A. There is a risk of corrosion.
- B. There is a risk of not properly functioning of the smoke detectors.
- C. There is a risk of electrostatic discharge.
- D. In a data centre environment relative humidity is not important, only temperature matters.
正解：A
解説：
High relative humidity in a data center can lead to corrosion of metal parts and electronic contacts, potentially causing failures. Electrostatic discharge is a risk with low humidity, not high.
References:
CDCP Exam Preparation Guide, Environmental Controls
質問 # 29
Which formula can provide a simple 'cost of downtime per hour" without taking seasonality and other factors into account?
- A. Revenue/1024
- B. Revenue/365
- C. Revenue/52
- D. Revenue/8760
正解：D
解説：
8760 is the number of hours in a year (24 hours × 365 days). Dividing annual revenue by 8760 gives a basic average revenue per hour, commonly used in downtime cost calculations.
References:
CDCP Exam Preparation Guide, page 34
EPI Data Centre Professional Course Materials
質問 # 30
What is the recommended level of Common Mode Noise (CMN)?
- A. CMN has r>o effect on ICTequipment so any level is ok
- B. > 5 Volt measured at the rack level
- C. Preferred to be < 1 Volt with a maximum of 3 Volt
- D. > 10 Volt measured at the rack level
正解：C
解説：
As per Certified Data Centre Professional (CDCP) reference materials, Common Mode Noise (CMN) is a type of electrical noise that appears equally on the line and neutral wires with respect to ground, and it can negatively affect sensitive ICT equipment. Excessive CMN at the rack level can lead to data errors, communication problems, equipment malfunctions, or even hardware damage.
The CDCP training and the official exam preparation guide specify that the preferred level of Common Mode Noise at the rack should be less than 1 Volt, and under no circumstances should it exceed 3 Volts.
Keeping CMN at these levels helps ensure the stable and reliable operation of critical data center infrastructure. Higher CMN levels indicate grounding or bonding issues, or possibly interference from electrical or mechanical sources, and must be addressed promptly.
Options A and B (CMN above 5 or 10 Volts) are not acceptable and would present a serious risk to ICT equipment operation and data integrity. Option D is incorrect, as CMN absolutely does affect ICT equipment.
:
EPI CDCP Exam Preparation Guide: https://www.epi-ap.com/uploads/file/exam%20prep
/english_preparation_guide_cdcp_202003.pdf
EPI Certified Data Centre Professional (CDCP) Course Content: https://www.epi-ap.com/services/1/3/4
/Certified_Data_Centre_Professional_(CDCP)
EPI Data Centre Framework: https://www.epi-ap.com/content/31/67/EPI_Data_Centre_Framework
質問 # 31
Which Class of Fires involves ordinary combustible materials such as paper, wood and cloth?
- A. Class K
- B. Class B
- C. Class D
- D. Class A
正解：D
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 # 32
Which type of Humidifier rapidly vibrates waster to create a fog or mist?
- A. Infrared Humidifier
- B. Steam Canister Humidifier
- C. Water Canister Humidifier
- D. Ultrasonic Humidifier
正解：D
解説：
An ultrasonic humidifier is a type of cool mist humidifier that uses a metallic diaphragm that vibrates at high frequencies to create water droplets that are added to the air. A fan projects these droplets into the air as mist, which then evaporates and humidifies the room. This type of humidifier rapidly vibrates the water to create a fog or mist.
References: EPI Data Centre Training Framework, How Humidifiers Can Help Allergies, Humidifier Buying Guide: Pros and Cons of Different Types.
質問 # 33
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