Latest CDCP Pass Guaranteed Exam Dumps with Accurate & Updated Questions
CDCP Exam Brain Dumps - Study Notes and Theory
NEW QUESTION # 14
What should be considered when implementing hot- or cold-aisle containment in an existing computer room?
- A. It will be more difficult to install power and network cabling in the contained area.
- B. Equipment will get too hot at the rear (back) of the rack potentially resulting in more ICT hardware failures.
- C. It creates potential issues with the existing fire suppression system(s).
- D. The delta-T of the equipment will increase too much causing reliability issues.
Answer: C
Explanation:
Hot- or cold-aisle containment is a strategy to improve the cooling efficiency and reduce the energy consumption of data centers by isolating the hot exhaust air from the cold supply air. However, implementing this strategy in an existing computer room may create potential issues with the existing fire suppression system(s), such as:
*The containment barriers may interfere with the distribution and activation of the fire suppression agents, such as water, gas, or aerosol, and reduce their effectiveness in extinguishing a fire.
*The containment barriers may create pockets of high temperature and pressure that could damage the equipment or the containment structure itself in the event of a fire.
*The containment barriers may obstruct the access and visibility of the fire detection and alarm devices, such as smoke detectors, heat sensors, or manual call points, and delay the response time of the fire suppression system(s).
*The containment barriers may violate the local fire codes and regulations that specify the minimum clearance and ventilation requirements for the data center.
Therefore, when implementing hot- or cold-aisle containment in an existing computer room, it is important to consider the impact on the existing fire suppression system(s) and take appropriate measures to ensure the safety and compliance of the data center, such as:
*Consulting with the fire authorities and the fire suppression system vendor to assess the compatibility and suitability of the containment solution with the existing fire suppression system(s).
*Modifying or upgrading the existing fire suppression system(s) to accommodate the containment solution, such as relocating or adding fire suppression devices, adjusting the discharge rate and pressure, or installing a secondary fire suppression system within the contained area.
*Installing fire-rated containment barriers that can withstand high temperatures and resist the spread of fire and smoke, and that have self-closing or automatic release mechanisms in case of a fire.
*Installing fire detection and alarm devices within the contained area and ensuring their proper integration and communication with the existing fire suppression system(s).
*Conducting regular testing and maintenance of the fire suppression system(s) and the containment solution to ensure their functionality and reliability.
References: EPI Data Centre Framework, Module 4: Fire Protection, page 10-11. EPI Data Centre Professional (CDCP®) Reference Materials, page 66-67. 1, 2, 3.
NEW QUESTION # 15
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 value measured at the front of the rack of the aisle the air conditioner is situated.
- D. It is the average value between the intake and exhaust (outlet) of the air conditioner.
Answer: A
Explanation:
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
NEW QUESTION # 16
Which Class of Fire involves combustible metals or combustible metal alloys such as magnesium, sodium and potassium?
- A. Class B
- B. Class C
- C. Class D
- D. Class A
Answer: C
Explanation:
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.
NEW QUESTION # 17
By what are magnetic fields of the type 'H' or 'B' created?
- A. Magnetic fields are created by voltage; the greater the voltage, the stronger the magnetic field.
- B. Magnetic fields are created by the magnetic flux of the earth which varies per month.
- C. 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.
- D. Magnetic fields are created when an electric current flows; the greater the current, the stronger the magnetic field.
Answer: D
Explanation:
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
NEW QUESTION # 18
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
Answer: B
Explanation:
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
NEW QUESTION # 19
Sprinkler heads used in computer rooms activate at what temperature?
- A. Only on direct contact with a flame
- B. 27 °C (81 °F)
- C. 70 C (158 °F)
- D. 57 °C (135 °F)
Answer: D
Explanation:
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
NEW QUESTION # 20
Where should exit/emergency signs be located?
- A. At each door
- B. Depends on the policy of the data centre
- C. At every escape door and pathways leading to doors (arrows)
- D. In the Computer room only
Answer: C
Explanation:
According to the EPI Data Centre Operations Standard (DCOS), exit/emergency signs should be located at every escape door and pathways leading to doors (arrows) to ensure a safe and quick evacuation in case of an emergency1. This is also consistent with the best practices for data centre emergency preparedness and response, which recommend having a clear and visible signage system for emergency exits23.
References: 1: EPI Data Centre Operations Standard (DCOS), Version 2.0, Section 5.4.2.1, Page 42 2: How to Prepare and Respond to Data Center Emergencies, White Paper 217, Schneider Electric, Page 4 3: How to Properly Manage Data Center Emergencies, IT Business Edge, Slide 2
NEW QUESTION # 21
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 lower the number the better the level of protection.
- B. 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.
- C. 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.
- 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.
Answer: B
Explanation:
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]
NEW QUESTION # 22
Measuring "Business Values" begins first with.
- A. Budget
- B. Network
- C. Physical Infrastructure
- D. Topology
Answer: A
Explanation:
Measuring "Business Values" begins first with budgeting and identifying the costs associated with the project.
This includes understanding the economic impact of the project, such as the cost of labor, materials, and other resources. It is also important to evaluate the return on investment (ROI) of the project, which will help to determine its overall value. Additionally, it is important to consider the long-term impact of the project and its potential to add value to the business in the future.
NEW QUESTION # 23
Which one of the following is a core objective of a Business Value in an organization?
- A. Increasing Sales
- B. Reducing Costs
- C. None of the above
- D. Reducing the Deficit
Answer: C
Explanation:
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.
NEW QUESTION # 24
What is the purpose of a service corridor?
- A. It provides a safe, vented and secure area where standby generators can operate safely.
- B. It is a generic name for pathways leading to other rooms that contains facility supporting equipment like the UPS room, battery room, generator room etc.
- C. It provides a secure area where supporting facilities can be serviced and monitored on a 24x7 basis without disturbing the computer room.
- D. To create a secure and conditioned environment where media can be stored in a controlled manner.
Answer: C
Explanation:
A service corridor is a dedicated space within or adjacent to a data centre that allows access to the supporting facilities, such as power, cooling, fire suppression, security, and cabling systems, without interfering with the computer room operations. A service corridor helps to isolate the noise, vibration, heat, and dust generated by the supporting facilities from the sensitive equipment in the computer room. A service corridor also enhances the safety and efficiency of the maintenance and monitoring activities, as well as the flexibility and scalability of the data centre design.
References: EPI Data Centre Training Framework, CDCP Preparation Guide, Service Corridors Definition | Law Insider
NEW QUESTION # 25
Which type of Humidifier is composed of water-filled canister containing electrodes?
- A. Steam Canister Humidifier
- B. Infrared Humidifiers
- C. Water Canister Humidifier
- D. Ultrasonic Humidifier
Answer: A
Explanation:
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.
NEW QUESTION # 26
What is the main risk for a data centre when the water supply fails?
- A. Failure to the water supply could result in DX cooling systems to fail.
- B. Failure to the water supply could result in sudden changes of the relative humidity in the Computer room.
- C. Failure to the water supply could cause issues for the cooling of back-up generators.
- D. Failure to the water supply could result in IT failure and/or denial of access to operate.
Answer: C
Explanation:
Back-up generators are essential for providing power to the data centre in case of a utility outage. However, back-up generators also generate a lot of heat, which needs to be dissipated by a cooling system. The cooling system may rely on water supply, either from the municipal network or from a dedicated tank. If the water supply fails, the cooling system may not function properly, leading to overheating and potential damage to the generators. This could compromise the reliability and availability of the data centre power supply and cause downtime or data loss.
References:
1: CDCP Preparation Guide, page 18, section 2.3.2 2: Data Center Generator Cooling Systems3, page 1, section 1 4: Data Center Cooling Systems5, page 1, section 1
NEW QUESTION # 27
What should be considered when using a direct air handler for a data centre?
- A. Temperature, humidity and contamination of the outdoor environment.
- B. The availability of three-phase power due to the high power requirements of these air handler units.
- C. Space available inside the computer rooms as the air handler space requirement for the inside the Computer room is quite large.
- D. Cost of operation as power consumption on these units tend to be higher compared to traditional air conditioning technology.
Answer: A
Explanation:
Direct air handlers are a type of cooling system that use outdoor air to cool the data centre. They draw in fresh air from outside, filter it, and supply it to the data centre at the desired temperature and humidity level. Direct air handlers can reduce the energy consumption and operating costs of data centres by eliminating the need for mechanical cooling or refrigeration. However, they also have some challenges and limitations that need to be considered. One of the main factors to consider when using direct air handlers for data centres is the temperature, humidity and contamination of the outdoor environment. Depending on the location and climate of the data centre, the outdoor air may not always be suitable for cooling the data centre. For example, if the outdoor air is too hot, too humid, or too polluted, it may not provide enough cooling capacity, or it may damage the IT equipment or cause corrosion. Therefore, direct air handlers need to have sensors and controls to monitor the outdoor air quality and adjust the airflow accordingly. They may also need to have backup cooling systems or supplementary cooling devices, such as evaporative coolers or heat exchangers, to cope with extreme weather conditions or peak loads.
References: Data Center Cooling: A Comprehensive Guide - Dgtl Infra, Carrier Data Center Cooling System
39DC, Dublin Data Center: Rooftop Air Handlers.
NEW QUESTION # 28
Which design consideration should be implemented with an Inergen-based fire suppression system?
- A. To use Inergen only for fires which are not related to electrical power.
- B. Install protective covers around the nozzles to avoid accidental gas dumps.
- C. Pressure relief valves are required in the room that needs protection.
- D. Install the gas containers (tanks) close to the data centre.
Answer: C
Explanation:
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
NEW QUESTION # 29
Which is the most damaging type of floor load?
- A. Uniformly Distributed Load (UDL)
- B. All loads are equally damaging to raised floor tiles
- C. Concentrated Load / Point Load (CP/ PL)
- D. Rolling Load (RL)
Answer: D
Explanation:
The most damaging type of floor load for raised floor tiles in a data centre is the rolling load (RL), according to the CDCP Preparation Guide1 and various web sources234. A rolling load is the load that is applied by a moving object, such as a pallet jack, a forklift, or a rack on wheels. A rolling load can cause more stress and fatigue on the raised floor tiles than a static load, such as a concentrated load (CP) or a uniformly distributed load (UDL), because it creates dynamic forces and impacts that can crack, dent, or deform the tiles. Moreover, a rolling load can also damage the pedestals and stringers that support the tiles, and cause the tiles to become loose or misaligned. Therefore, when designing and installing a raised floor system, it is important to consider the maximum rolling load that the tiles can withstand, and to use appropriate materials and methods to enhance the strength and durability of the tiles. For example, some possible solutions include using steel or concrete-filled tiles, reinforcing the edges and corners of the tiles, and using locking or gravity-held systems to secure the tiles.
References:
1: CDCP Preparation Guide, page 23, section 2.4.2 2: Top 5 Considerations - Selecting a Data Center Raised Floor Tile5, page 1, section 1 3: Raised Floor Systems: Explained, Improved and Reinvented6, page 1, section
1 4: Raised Floor Systems: Common Problems and Solutions7, page 1, section 1
NEW QUESTION # 30
An optical fiber cable comes with the specifications 50/125 um.
What do the numbers represent?
- A. The first number represents the diameter of the core; the second number represents the diameter of the cladding in microns.
- 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 required distance to single-phase power cabling; the second number represents the required distance to three-phase cabling.
- 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.
Answer: A
Explanation:
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
NEW QUESTION # 31
Which one of the following is an AC Power Quality Anomaly?
- A. Signal Distortion
- B. Attenuation
- C. Backup Condition
- D. Waveform Distortion
Answer: D
Explanation:
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
NEW QUESTION # 32
The three elements of the fire triangle are,and. (Choose three.)
- A. Heat
- B. Oxygen
- C. Earth
- D. Fuel
- E. Water
Answer: A,B,D
Explanation:
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.
NEW QUESTION # 33
What needs to be installed in the battery room when using Lithium-ion batteries?
- A. A proper supply of distilled water.
- B. High capacity air-conditioning equipment since Lithium-ion batteries are sensitive to high temperatures, which can reduce their lifetime.
- C. A proper ventilation system since Lithium-ion batteries produce highly flammable Hydrogen gas during charging.
- D. A battery management system to monitor and prevent unsafe temperatures during charging/discharging.
Answer: D
Explanation:
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
NEW QUESTION # 34
The expected time to Recover/Repair from a system from a failure is defined as.
- A. MTBF
- B. MTTR
- C. MLBF
- D. MCBF
Answer: B
Explanation:
The expected time to recover or repair from a system from a failure is defined as MTTR (mean time to recovery or mean time to repair). MTTR is the average time it takes to restore a system or product to its normal operation after a failure. MTTR includes the time spent on detecting, diagnosing, and fixing the problem. MTTR is an important metric for measuring the reliability and availability of a system or product, as well as the efficiency and effectiveness of the incident management process. A lower MTTR indicates a faster and more reliable recovery or repair process.
References:
*EPI Data Centre Professional (CDCP®) Preparation Guide, page 17
*What is MTTR? | IBM
*Explained: All Meanings of MTTR and Other Incident Metrics
NEW QUESTION # 35
is the arithmetic mean of time between the failing and the subsequent running of the system in a particular time period.
- A. MTBF
- B. MTTR
- C. MLBF
- D. MCBF
Answer: A
Explanation:
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
NEW QUESTION # 36
The termination of the ability of a product to perform its required function can be defined as.
- A. Obstacle
- B. Hindrance
- C. Termination
- D. Failure
Answer: D
Explanation:
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
NEW QUESTION # 37
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