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NEW QUESTION # 37
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 # 38
Does shielded twisted pair network cabling provide protection against EMF from power cables?
- A. Yes, but only if the power cable is placed in a tre-foil cable arrangement.
- B. Yes, as the shielding for twisted pair network cabling is specifically design for low frequency EMF protection.
- C. No, the shielding is designed for alien cross-talk between network cables, it provides no or little protection against low frequency EMF.
- D. No, the shielding for twisted pair network cabling is for physical protection against vandalism and accidental cutting of the cable.
Answer: C
Explanation:
Shielded twisted pair cables (STP) are Ethernet cables that feature additional protection against electromagnetic interference from external sources, such as radio waves, microwaves, or other network cables.
This is achieved by wrapping each pair of wires with a conductive shield, usually made of foil or braided wire, and then enclosing the entire cable with another shield layer. However, this shielding is not effective against low frequency electromagnetic fields (EMF) from power cables, which can induce currents and voltages in the network cables and cause signal distortion or data loss. Low frequency EMF can only be reduced by increasing the distance between the power and network cables, or by using a tre-foil cable arrangement, which is a special configuration of three power cables twisted together to cancel out the magnetic fields they generate.
References: STP Cable: Your Shield Against Network Disturbances; What is Shielded Twisted Pair Cable? - Advantages, Disadvantages; Shielded vs. Unshielded Cables: What's the Difference? - Cable Matters.
NEW QUESTION # 39
The termination of the ability of a product to perform its required function can be defined as.
- A. Failure
- B. Termination
- C. Hindrance
- D. Obstacle
Answer: A
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 # 40
Which one of the following is a core objective of a Business Value in an organization?
- A. Reducing the Deficit
- B. Reducing Costs
- C. None of the above
- D. Increasing Sales
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 # 41
The three elements of the fire triangle are,and. (Choose three.)
- A. Water
- B. Fuel
- C. Earth
- D. Heat
- E. Oxygen
Answer: B,D,E
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 # 42
is the degree to which a system or component is operational and accessibility when required for use.
- A. Scalability
- B. Reliability
- C. Availability
- D. Agility
Answer: C
Explanation:
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.
NEW QUESTION # 43
What type of heal does ICT equipment generate?
- A. Both latent and sensible heat
- B. Latent heal
- C. Radiant heat
- D. Sensible heaT
Answer: D
Explanation:
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
NEW QUESTION # 44
Which one of the following is an Audible Signaling and Notification Device?
- A. Alarms
- B. Strobes
- C. Sirens
- D. Clocks
Answer: C
Explanation:
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.
NEW QUESTION # 45
Which one of the following is the last stage in Stages of Combustion?
- A. Flaming Fire
- B. Intense Heat
- C. Incipient
- D. Visible Smoke
Answer: A
Explanation:
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]
NEW QUESTION # 46
When designing a data centre with a raised-floor setup, where should the air conditioners be placed?
- A. Perpendicular to the hot aisle
- B. Perpendicular to the side of the rack
- C. Perpendicular to the cold aisle
- D. Close to the entrance door to create an air curtain to avoid hot comes into the computer room
Answer: A
NEW QUESTION # 47
What needs to be installed in the battery room when using Lithium-ion batteries?
- A. A battery management system to monitor and prevent unsafe temperatures during charging/discharging.
- 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 proper supply of distilled water.
Answer: A
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 # 48
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. Anywhere as data centre tiles are designed to allow cut-outs anywhere.
- C. Cut the tiles at the corner so the pedestals can be used as a vertical cable manager.
- D. Draw a cross on the tile and when making a cut-out do not touch a line and avoid the corners.
Answer: D
Explanation:
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
NEW QUESTION # 49
Which one of the following is an Objective of Data Center Fire Protection?
- A. Depression
- B. Suppression
- C. Information
- D. Representation
Answer: B
Explanation:
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
NEW QUESTION # 50
Which source is used in fiber cable to transmit data?
- A. Pulse
- B. Electric
- C. Signals
- D. Light
Answer: D
Explanation:
Fiber-optic cables use light as the source to transmit data. Light pulses are modulated to carry information through an optical fiber. The light is confined in the core of the fiber by total internal reflection at the core-cladding interface. The light travels along the fiber with minimal loss or interference, making it suitable for long-distance and high-bandwidth applications.
References: EPI Data Centre Training Framework, Principle of Data transmission through fiber optic cables, Fiber-optic communication
NEW QUESTION # 51
Which type of Humidifier suspends quartz lamps over an open pool of water?
- A. Steam Canister Humidifier
- B. Infrared Humidifiers
- C. Water Canister Humidifier
- D. Ultrasonic Humidifier
Answer: B
Explanation:
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
NEW QUESTION # 52
Cost of Downtime can be classified as.
- A. Classified and Declassified
- B. Mean and Median
- C. Up and Down
- D. Direct and Indirect
Answer: D
Explanation:
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
NEW QUESTION # 53
How many monitoring points should be used in Temperature Measurement?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
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.
NEW QUESTION # 54
What is the recommended level of Common Mode Noise (CMN)?
- A. > 10 Volt measured at the rack level
- B. Preferred to be < 1 Volt with a maximum of 3 Volt
- C. CMN has r>o effect on ICTequipment so any level is ok
- D. > 5 Volt measured at the rack level
Answer: B
Explanation:
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
NEW QUESTION # 55
Does unplanned downtime of a data centre have an impact on the business results?
- A. No, because data centres operate independently from the business.
- B. No, unplanned data centre downtime is already financially planned for in the yearly budget planning process.
- C. Yes, but data centre downtime only impacts the airline industry.
- D. Yes, data centre downtime can result in business downtime.
Answer: D
Explanation:
Data centres are essential for supporting the IT operations and applications of various businesses across different industries. Data centre downtime can have a negative impact on the business results, such as loss of revenue, customer satisfaction, productivity, reputation, and competitive advantage. According to a web search, the average cost of data centre downtime in 2020 was $8,851 per minute, and the average duration of a data centre outage was 95 minutes1. This means that a typical data centre outage could cost a business over
$840,000 in direct and indirect losses1. Therefore, data centre downtime can have a significant impact on the business results, regardless of the industry or sector.
References: Unplanned Downtime Costs More Than You Think, Downtime, Outages and Failures - Understanding Their True Costs, The Unplanned Downtime Nightmare - And How Operators Can Avoid
NEW QUESTION # 56
What should be considered when implementing hot- or cold-aisle containment in an existing computer room?
- A. The delta-T of the equipment will increase too much causing reliability issues.
- B. It will be more difficult to install power and network cabling in the contained area.
- C. It creates potential issues with the existing fire suppression system(s).
- D. Equipment will get too hot at the rear (back) of the rack potentially resulting in more ICT hardware failures.
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 # 57
What is the most cost-effective way to avoid EMF issues within the Computer room?
- A. Install TUVapp'oved shielding material
- B. Create a distance between the EMF source and the ICT equipment / copper network cabling
- C. Reducing the temperature in computer room to 18° C / 64= Fahrenheit
- D. Reducing the voltage in the computer room
Answer: B
Explanation:
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
NEW QUESTION # 58
What is a requirement of an FM200 (HFC-227) installation?
- A. Install pre-action sprinklers in the same room as the FM200.
- B. Install the gas containers (tanks) close to the data centre.
- C. It is a high-pressure gas; therefore nozzles must be mounted with two brackets.
- D. Drainage system under the raised floor.
Answer: C
Explanation:
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
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