無料CDCPサンプル問題で100%カバー率のリアル試験問題（更新された90問あります) [Q44-Q67]

無料CDCPサンプル問題で100%カバー率のリアル試験問題（更新された90問あります)

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質問 # 44
What are the four main components of a refrigeration circuit?

A. Evaporation, membrane filter, monitor sensor, pressure valve
B. Evaporator, compressor, condenser, expansion valve
C. Thermostat, monitoring interface, indoor unit, outdoor unit
D. Condenser, expansion valve, buffer tank, de-icing unit

正解：B

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 # 45
What is the best practice for cutting holes in the raised floor tile?

A. Draw a line in the middle of the tile and never touch the line when making the cut.
B. Draw a cross on the tile and when making a cut-out do not touch a line and avoid the corners.
C. Anywhere as data centre tiles are designed to allow cut-outs anywhere.
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 # 46
Looking from within the Computer room, what should the door-swing (opening) direction be?

A. Depends on the type of Computer room
B. Instead of swinging doors, sliding doors are preferred
C. Outwards, code permitted
D. Inwards, code permitted

正解：C

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 # 47
What needs to be installed in the battery room when using Lithium-ion batteries?

A. High capacity air-conditioning equipment since Lithium-ion batteries are sensitive to high temperatures, which can reduce their lifetime.
B. A proper ventilation system since Lithium-ion batteries produce highly flammable Hydrogen gas during charging.
C. A battery management system to monitor and prevent unsafe temperatures during charging/discharging.
D. A proper supply of distilled water.

正解：C

解説：
According to the EPI Data Centre Training Framework, lithium-ion batteries are becoming more popular in data centres due to their higher energy density, longer lifespan, and lower maintenance costs compared to lead-acid batteries1. However, lithium-ion batteries also have some drawbacks, such as higher initial cost, stricter safety requirements, and potential thermal runaway risks1. Therefore, a battery management system (BMS) is essential to monitor and control the voltage, current, temperature, and state of charge of each battery cell or module, and to prevent overcharging, over-discharging, or overheating23. A BMS can also communicate with the UPS system and provide information on the battery status, performance, and health2.
References: 1: EPI Data Centre Training Framework, Module 5: Power, Section 5.3.2: Battery Technologies, Page 5-19 2: Benefits of Lithium-ion batteries for data centers at the edge,Data Center Knowledge, Page 1 3:
Lithium-Ion Batteries in Data Centers, Data Center Systems, Inc, Page 1

質問 # 48
The termination of the ability of a product to perform its required function can be defined as.

A. Termination
B. Obstacle
C. Failure
D. Hindrance

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 # 49
How many monitoring points should be used in Temperature Measurement?

A. 0
B. 1
C. 2
D. 3

正解：A

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 # 50
Which formula can provide a simple 'cost of downtime per hour" without taking seasonality and other factors into account?

A. Revenue/365
B. Revenue/52
C. Revenue/8760
D. Revenue/1024

正解：C

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 # 51
How many monitoring points should be used in Temperature Measurement?

A. 0
B. 1
C. 2
D. 3

正解：A

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 # 52
A fire extinguisher in the data centre is found which is classed as ABC.
Is this suitable?

A. Depends on the brand
B. No
C. Only for fires not related to electrical power
D. Yes

正解：B

解説：
A fire extinguisher in the data centre that is classed as ABC is not suitable, because it contains dry chemical powder that can damage the ICT equipment and the data. ABC fire extinguishers are designed to fight Class A, B, and C fires, which are fueled by combustible materials, flammable liquids or gases, and electrical equipment, respectively. However, the dry chemical powder can leave a corrosive residue on the ICT equipment, which can cause short circuits, data loss, or malfunction. Moreover, the dry chemical powder can be difficult to clean, especially from the small spaces and crevices of the ICT equipment. Therefore, ABC fire extinguishers are not recommended for data centres, and should be replaced with more suitable fire extinguishers, such as clean agent fire extinguishers, which use gas or liquid that does not leave any residue or harm the ICT equipment.
References:
1: CDCP Preparation Guide, page 24, section 2.4.3 2: Data Center Fire Suppression: Overview & Protection Guide3, page 1, section 1 4: Fire Extinguisher Classes and Suitability5, page 1, section 1 6: SAFETY DATA SHEET Commercial ABC Dry Chemical (Fire Extinguishing Agent ...7, page 1,

質問 # 53
What should be taken into consideration when using patch cables?

A. Patch cables can only be used in combination with flat patch panels.
B. Patch cables can only be used in combination with angled patch panels.
C. The patch cable should always be the same of a lower class the structured cable.
D. The patch cable should always be the same or a higher class the structured cable.

正解：D

解説：
Patch cables of a lower class than the structured cabling can degrade the overall link performance, so it is best practice to use the same or higher class.
References:
CDCP Exam Preparation Guide, Cabling

質問 # 54
Starting from which Rating does the requirement of Concurrently Maintainability becomes relevant?

A. Rated-3
B. Rated-2
C. Rated-1
D. Rated-4

正解：A

解説：
The requirement of Concurrently Maintainability becomes relevant starting from Rated-3, according to the Uptime Institute Tier Classification System1. Concurrently Maintainability means that any component or system in the data centre can be maintained or replaced without affecting the availability of the IT equipment.
This requires having redundant capacity components and multiple independent distribution paths serving the IT equipment. Rated-3 data centres are designed to achieve Concurrently Maintainability and have a minimum uptime of 99.982%. Rated-4 data centres also have Concurrently Maintainability, but they also have Fault Tolerance, which means that they can withstand any single unplanned event without affecting the availability of the IT equipment. Rated-4 data centres have a minimum uptime of 99.995%. Rated-1 and Rated-2 data centres do not have Concurrently Maintainability, as they have only one distribution path serving the IT equipment and no redundant capacity components. Rated-1 data centres have a minimum uptime of 99.671% and Rated-2 data centres have a minimum uptime of 99.741%.
References:
1: Uptime Institute Tier Classification System2, page 1, section 1 2: Data Center Tiers Classification Explained: (Tier 1, 2, 3, 4)3, page 1, section 1 3: Data Center Tier Standards4, page 1, section 1

質問 # 55
Which one of the following is an Objective of Data Center Fire Protection?

A. Depression
B. Representation
C. Information
D. Suppression

正解：D

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 # 56
What type of heal does ICT equipment generate?

A. Both latent and sensible heat
B. Latent heal
C. Sensible heaT
D. Radiant heat

正解：C

解説：
According to the Certified Data Centre Professional (CDCP) reference materials, ICT (Information and Communication Technology) equipment such as servers, switches, and storage devices generate sensible heat.
Sensible heat is the heat energy that causes a change in temperature of the air but does not contribute to humidity or moisture content. This is in contrast to latent heat, which involves a change in moisture (humidity) in the air, such as from evaporation or condensation.
ICT equipment does not introduce moisture into the environment; it only raises the temperature of the surrounding air, making it sensible heat. Proper data center cooling focuses on removing this sensible heat load to maintain optimal equipment operating conditions. Latent heat loads, such as those from people or water leaks, are typically not generated by ICT equipment and are managed differently in facility design.
Radiant heat is a minor consideration and typically refers to heat transferred by electromagnetic waves (e.g., from sunlight or hot surfaces), not the primary mode of heat transfer from ICT equipment, which is primarily through convection (airflow) and is measured as sensible heat.
:
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 # 57
When dealing with glass door racks, cod air is injected into the rack from:

A. The front door in a downflow direction.
B. The top of the rack through the fans and vents mounted inside the rack.
C. The bottom of the rack.
D. The rear door in a downflow direction.

正解：D

質問 # 58
Escape route signage should be placed where?

A. Only at the main entrance of the data centre building
B. At every door providing a pathway
C. At every door including riser doors, doors of storage closets etc.
D. Only at emergency escape doors

正解：B

解説：
Escape route signage should be placed at every door providing a pathway to the exit or the assembly area, according to the CDCP Preparation Guide1 and the EU Safety/Health Signs Directive2. Escape route signage is used to guide the occupants of the data centre fromwherever they are in the building, via a place of relative safety (the escape route), to the place of ultimate safety (the assembly area). Escape route signage should not be limited to only emergency escape doors or the main entrance of the data centre building, as these may not be accessible or visible from all locations. Escape route signage should also not include doors that do not lead to the exit or the assembly area, such as riser doors, doors of storage closets, or doors of other rooms, as these may confuse or mislead the occupants. Escape route signage should be placed at every door that provides a pathway to the exit or the assembly area, and should indicate the direction and distance of the escape route using pictograms, arrows, and words. Escape route signage should also be designed and installed in accordance with the relevant standards and codes, such as BS 5499 and ISO 7010.
References:
1: CDCP Preparation Guide, page 24, section 2.4.3 2: EU Safety/Health Signs Directive3, page 1, section 1

質問 # 59
The UPS vendor is offering the latest model of their UPS to you. The vendor indicates that the UPS is categorized as VFD class.
Is this UPS a fit for your mission-critical data centre?

A. No
B. Yes, but only if you oversize the battery bank with 10%.
C. Yes, but only if they install it with a 12-pulse rectifier.
D. Yes

正解：A

解説：
A UPS (uninterruptible power supply) that is categorized as VFD class is not a fit for your mission-critical data centre, because it does not provide adequate protection against voltage and frequency variations. VFD stands for Voltage and Frequency Dependent, which means that the output voltage and frequency of the UPS depend on the input voltage and frequency. VFD UPSs are also known as offline, standby, or line-interactive UPSs. They typically switch to battery power only when the input power fails or goes beyond a certain threshold. However, this switching may cause a brief interruption or a transient in the output power, which can affect the performance and reliability of the ICT equipment. Moreover, VFD UPSs do not filter or regulate the input power, which means that they pass on any voltage or frequency fluctuations, harmonics, or noise to the output power. These power quality issues can also damage or degrade the ICT equipment and the data.
For your mission-critical data centre, you need a UPS that is categorized as VFI class, which stands for Voltage and Frequency Independent. VFI UPSs are also known as online, continuous, or double-conversion UPSs. They provide a constant and clean output power that is independent of the input power. VFI UPSs convert the input AC power to DC power, and then convert it back to AC power with the desired voltage and frequency. This double conversion process isolates the output power from the input power, and eliminates any power quality issues. VFI UPSs also have zero switching time, which means that they do not cause any interruption or transient in the output power when switching to battery power. VFI UPSs are designed to protect the ICT equipment and the data from any adverse effects of voltage and frequency variations, and to ensure the highest level of availability and reliability.
References:
1: CDCP Preparation Guide, page 17, section 2.3.1 2: Understanding UPS Classification: Fuji Electric's Technical Guide3, page 1, section 1 4: Uninterruptible Power Supplies Key Product Criteria5, page 1, section
1 6: UPS Function: Reduced Input Voltage for VFDs - KEB7, page 1, section 1

質問 # 60
What is a requirement of an FM200 (HFC-227) installation?

A. Install the gas containers (tanks) close to the data centre.
B. Drainage system under the raised floor.
C. Install pre-action sprinklers in the same room as the FM200.
D. It is a high-pressure gas; therefore nozzles must be mounted with two brackets.

正解：D

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 # 61
When dealing with glass door racks, cool air is injected into the rack from:

A. The front door in a downflow direction.
B. The top of the rack through the fans and vents mounted inside the rack.
C. The bottom of the rack.
D. The rear door in a downflow direction.

正解：D

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 # 62
The three elements of the fire triangle are,and. (Choose three.)

A. Heat
B. Fuel
C. Water
D. Oxygen
E. Earth

正解：A、B、D

解説：
The fire triangle is a simple model that illustrates the three elements that a fire needs to ignite and sustain:
oxygen, heat, and fuel. Oxygen is the oxidizing agent that enables the combustion reaction, heat is the energy source that raises the temperature of the fuel to its ignition point, and fuel is the material that reacts with oxygen and releases heat and light. Removing any one of these elements can extinguish a fire. For example, water can reduce the heat and the oxygen, sand or soil can smother the fuel and the oxygen, and fire extinguishers can displace the oxygen or lower the temperature.
References: EPI Data Centre Professional (CDCP®) Reference Materials, page 66.EPI Data Centre Framework, Module 4: Fire Protection, page 4. 1, 2, 3.

質問 # 63
IP protection grades consist of two numbers.
Which levels of protection do they describe and what is the best protection?

A. First digit; protections against the ingress of solid objects. Second digit; protection against ingress of water/fluids. The higher the number the better the level of protection.
B. First digit; protections against the ingress of water/fluids. Second digit; protection against ingress of solid objects. The higher the number the better the level of protection.
C. First digit; protections against the ingress of solid objects. Second digit; protection against ingress of water/fluids. The lower the number the better the level of protection.
D. First digit; protections against the ingress of water/fluids. Second digit; protection against ingress of solid objects. The lower the number the better the level of protection.

正解：A

解説：
IP protection grades are a way of showing the effectiveness of electrical enclosures in blocking foreign bodies such as dust, moisture, liquids, and accidental contact. IP stands for Ingress Protection or International Protection, and it is defined by the international standard IEC 60529. IP ratings consist of the letters IP followed by two digits and an optional letter. The first digit indicates the level of protection the enclosure provides against access to hazardous parts and the ingress of solid foreign objects. The second digit indicates the level of protection the enclosure provides against the ingress of water or fluids. The higher the number, the better the level of protection. For example, IP65 means the enclosure is dust-tight and can withstand water jets from any direction. IP68 means the enclosure is dust-tight and can be submerged in water under specified conditions.
References: EPI Data Centre Training Framework, CDCP Preparation Guide, IP code - Wikipedia, [IP Ratings Explained | Ingress Protection Rating | IP Codes | Updated 2022]

質問 # 64
Which one of the following is the last stage in Stages of Combustion?

A. Incipient
B. Visible Smoke
C. Flaming Fire
D. Intense Heat

正解：C

解説：
The last stage in stages of combustion is flaming fire, which occurs when the fuel vapors and oxygen are mixed in the right proportion and ignited by a flame or a spark. Flaming fire is characterized by visible flames, intense heat, and rapid oxidation. Flaming fire can cause severe damage to the data center equipment, personnel, and business continuity. Therefore, it is important to prevent or suppress flaming fire as soon as possible using appropriate fire detection and suppression systems.
References:
*EPI Data Centre Professional (CDCP) Preparation Guide, page 31
*[Fire Detection and Suppression Systems for Data Centers]

質問 # 65
What is the most preferred unit of measure for cooling capacity?

A. Ton
B. Horsepower
C. Watt
D. BTU

正解：C

解説：
Cooling capacity is the measure of a cooling system's ability to remove heat from a space. The most preferred unit of measure for cooling capacity is watt (W), which is the SI unit for power. Watt is defined as the amount of energy transferred or converted per unit time. One watt is equal to one joule of energy per second. Using watt as the unit of measure for cooling capacity allows for easy comparison and calculation of the cooling performance and efficiency of different cooling systems.
Other units of measure for cooling capacity are ton, BTU, and horsepower, but they are less common and less convenient than watt. Ton is a unit of measure that describes how much water at freezing temperature can be frozen in 24 hours, equivalent to 3.5 kW or 12,000 BTU/h. BTU (British Thermal Unit) is a unit of measure that describes the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit, equivalent to 0.293 W. Horsepower is a unit of measure that describes the rate at which work is done, equivalent to 746 W.
References:
*Data Centre Professional (CDCP) Reference Materials, page 8, section 2.1.1
*Data Centre Professional (CDCP) Preparation Guide, page 11, section 2.1.1
*Cooling capacity - Wikipedia
*Air Conditioner BTU Calculator
*Air conditioning 101: Basics, working principle and sizing ... - GlobalSpec
*How is cooling capacity measured? - Sage-Advices
*Everything You Need to Know About Cooling Capacity

質問 # 66
What is a disadvantage of a Dynamic UPS?

A. They are heavy and more noisy.
B. It needs a separate back-up generator as their autonomy time is less than 60 seconds.
C. They are only available for small to medium sized data centres, due to their limited capacity of 200 kVA
D. It needs additional cooling infrastructure as high temperatures reduces the lifetime of a Dynamic UPS.

正解：A

質問 # 67
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