[Feb-2026] Updated EPI Data Centre CDCP Exam Questions BUNDLE PACK
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NEW QUESTION # 31
Which Class of Fire involves combustible metals or combustible metal alloys such as magnesium, sodium and potassium?
- A. Class A
- B. Class B
- C. Class C
- D. Class D
Answer: D
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 # 32
What is the main risk for a data centre when the water supply fails?
- A. Failure to the water supply could result in IT failure and/or denial of access to operate.
- B. Failure to the water supply could cause issues for the cooling of back-up generators.
- C. Failure to the water supply could result in DX cooling systems to fail.
- D. Failure to the water supply could result in sudden changes of the relative humidity in the Computer room.
Answer: B
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 # 33
Which of statements below is true?
- A. Multi-mode cabling can cross longer distances.
- B. Multi-mode cabling is more expensive than single-mode cabling.
- C. Single-mode cabling is more expensive than multi-mode cabling.
- D. Single-mode cabling can use both LED and laser as a light source.
Answer: C
Explanation:
Single-mode cabling and multi-mode cabling are two types of fiber optic cables that differ in their core diameter, wavelength, light source, bandwidth, distance, and cost. Single-mode cabling has a smaller core diameter and uses a laser as a light source, which enables it to transmit data over longer distances and higher bandwidths. However, single-mode cabling is also more expensive than multi-mode cabling, because it requires more precise alignmentand splicing, and more costly light sources and connectors. Multi-mode cabling has a larger core diameter and uses LEDs or VCSELs as a light source, which makes it cheaper and easier to install and maintain. However, multi-mode cabling also has a shorter distance and lower bandwidth than single-mode cabling, because it suffers from more modal dispersion and attenuation.
References:
1: Data Center Cabling: Single Mode vs Multimode Fibers2, page 1, section 1 3: Single Mode vs Multimode Fiber Cable Guide4, page 1, section 1 5: Single-Mode vs. Multi-Mode Fiber Cables: Explained6, page 1, section 1 7: 2 Types of Fiber Optic Cable: Single Mode vs. Multimode Fiber8, page 1, section 1
NEW QUESTION # 34
What is the best practice for cutting holes in the raised floor tile?
- A. Cut the tiles at the corner so the pedestals can be used as a vertical cable manager.
- B. Anywhere as data centre tiles are designed to allow cut-outs anywhere.
- C. Draw a line in the middle of the tile and never touch the line when making the cut.
- 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 # 35
What is the most preferred unit of measure for cooling capacity?
- A. Watt
- B. Horsepower
- C. BTU
- D. Ton
Answer: A
Explanation:
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
NEW QUESTION # 36
Which one of the following is an Audible Signaling and Notification Device?
- A. Alarms
- B. Sirens
- C. Strobes
- D. Clocks
Answer: B
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 # 37
Does unplanned downtime of a data centre have an impact on the business results?
- A. No, unplanned data centre downtime is already financially planned for in the yearly budget planning process.
- B. Yes, but data centre downtime only impacts the airline industry.
- C. Yes, data centre downtime can result in business downtime.
- D. No, because data centres operate independently from the business.
Answer: C
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 # 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. No, the shielding is designed for alien cross-talk between network cables, it provides no or little protection against low frequency EMF.
- C. No, the shielding for twisted pair network cabling is for physical protection against vandalism and accidental cutting of the cable.
- D. Yes, as the shielding for twisted pair network cabling is specifically design for low frequency EMF protection.
Answer: B
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
When referring to the internal mounting space in racks, equipment manufactures generally refer to standardized height of electronic modules "U" or "RU". What is the height of 1 "U" or "RU"?
- A. 3.5 inches (8.59 crn)
- B. 19 inches (60 cm)
- C. 24 inches (80 cm)
- D. 1.75 inches (4.445 cm)
Answer: D
Explanation:
According to the Certified Data Centre Professional (CDCP) Reference Materials, the height of 1 "U" (rack unit) or "RU" (rack unit) is standardized at 1.75 inches, which is equivalent to 44.45 millimeters or 4.445 centimeters. This unit of measurement is globally used to define the internal mounting space in IT and telecommunications racks. Equipment manufacturers specify their devices' height based on how many "U" the device occupies (for example, a 2U server is 3.5 inches high). The standardization ensures interoperability and planning efficiency within the data center environment.
The "U" (rack unit) system is essential for ensuring that racks and equipment from different manufacturers will fit together properly, facilitating modularity, expansion, and maintenance. The 1.75-inch specification is defined by several industry standards including EIA-310 and is referenced directly in the EPI CDCP training and its official exam preparation guides.
:
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 EPI Data Centre Competence Framework: https://www.epi-ap.com/content/31/83
/EPI_Data_Centre_Competence_Framework_(EPI-DCCF)
EPI CDCP FAQ
Official standards: EIA-310
NEW QUESTION # 40
When having two non-synchronized power sources, the ATS / STS need to be of the type:
- A. Both an ATS and STS can never handle two non-synchronized sources.
- B. Both make before break or break before make can be used.
- C. Make before break.
- D. Break before make.
Answer: D
Explanation:
When having two non-synchronized power sources, the ATS / STS need to be of the type break before make, which means that the switch disconnects from one source before connecting to the other source. This prevents any short circuit, back feed, or phase mismatch that could occur if the two sources were connected simultaneously. Break before make switches are also known as open transition switches, because they create a brief interruption in the power supply during the switching process. This interruption is usually acceptable for most ICT equipment, as they have internal power supplies or batteries that can handle the transient. However, if the interruption is not acceptable, then the two power sources need to be synchronized before switching, which requires a make before break switch, also known as a closed transition switch. Make before break switches connect to the second source before disconnecting from the first source, which ensures a seamless transfer of power without any interruption. However, make before break switches require that the two sources have the same voltage, frequency, and phase, which can be achieved by using a synchronization module or a phase-locked loop.
References:
1: CDCP Preparation Guide, page 17, section 2.3.1 2: STS in data centres - Borri3, page 1, section 1 4: Using Static Transfer Switches to Enhance Data Center ... - Donwil5, page 1, section 1 6: What is an Automatic Transfer Switch (Power)? | Ethan Banks7, page 1, section 1
NEW QUESTION # 41
What is the effect of a high relative humidity in the data centre?
- A. There is a risk of corrosion.
- B. In a data centre environment relative humidity is not important, only temperature matters.
- C. There is a risk of electrostatic discharge.
- D. There is a risk of not properly functioning of the smoke detectors.
Answer: A
Explanation:
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
NEW QUESTION # 42
How many monitoring points should be used in Temperature Measurement?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
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 # 43
Which one of the following is an Objective of Data Center Fire Protection?
- A. Depression
- B. Information
- C. Representation
- D. Suppression
Answer: D
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 # 44
Which one of the following is a core objective of a Business Value in an organization?
- A. Increasing Sales
- B. Reducing the Deficit
- C. None of the above
- D. Reducing Costs
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 # 45
Which one of the following is an Audible Signaling and Notification Device?
- A. Alarms
- B. Sirens
- C. Strobes
- D. Clocks
Answer: B
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 # 46
Looking from within the Computer room, what should the door-swing (opening) direction be?
- A. Outwards, code permitted
- B. Instead of swinging doors, sliding doors are preferred
- C. Depends on the type of Computer room
- D. Inwards, code permitted
Answer: A
Explanation:
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
NEW QUESTION # 47
What needs to be installed in the battery room when using Lithium-ion batteries?
- A. A proper supply of distilled water.
- 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. High capacity air-conditioning equipment since Lithium-ion batteries are sensitive to high temperatures, which can reduce their lifetime.
Answer: C
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
New server equipment is arriving at your data centre, where should it be tested?
- A. In the Holding area
- B. In the Staging room
- C. In the Computer! Server room
- D. In the Media storage area
Answer: B
Explanation:
New equipment should be unpacked, tested, and configured in a dedicated staging room before being moved to the live data hall to prevent contamination and disruptions.
References:
CDCP Exam Preparation Guide, Staging/Receiving Area
NEW QUESTION # 49
is the ability of a system or component to perform its required functions under stated conditions for a specified period of time.
- A. Agility
- B. Reliability
- C. Scalability
- D. Availability
Answer: B
Explanation:
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
NEW QUESTION # 50
A UPS has an internal battery tester, do you still need to separately test the batteries at block level?
- A. Yes, the UPS will only test the batteries at string level which only gives an indication on the overall status of the battery string. Measurements at block level will provide more detailed information on the status and remaining lifetime of the batteries itself.
- B. No, the UPS will automatically generate and alarm when de battery voltage is too low to operate.
- C. Testing batteries using the built-in battery tester or resting the batteries at block level does not increase the battery lifetime, therefore it is not recommended.
- D. No, as mentioned the battery tester is already built-in the UPS.
Answer: A
Explanation:
Block-level testing identifies weak or failing individual batteries that may not show up in string-level tests, enhancing overall system reliability.
References:
CDCP Exam Preparation Guide, Power/UPS Maintenance
NEW QUESTION # 51
Which one of the following is a core objective of a Business Value in an organization?
- A. Increasing Sales
- B. Reducing the Deficit
- C. None of the above
- D. Reducing Costs
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 # 52
Which one of the following is a Natural Disaster?
- A. Blackouts
- B. Hurricanes
- C. Grid Failure
- D. Human Error
Answer: B
Explanation:
According to the CDCP® Preparation Guide, a natural disaster is a catastrophic event that is caused by natural forces and has a significant impact on human lives, property, and environment. Hurricanes are examples of natural disasters, as they are powerful storms that form over warm ocean waters and produce strong winds, heavy rain, storm surges, and flooding. Grid failure, blackouts, and human error are not natural disasters, but rather man-made or technological disasters that result from failures or errors in human systems or activities.
References: CDCP® Preparation Guide, page 9. Natural Disaster Readiness for Data Centers. EM-DAT - The international disaster database. PDC Global - Pacific Disaster Center.
NEW QUESTION # 53
Which source is used in fiber cable to transmit data?
- A. Light
- B. Signals
- C. Electric
- D. Pulse
Answer: A
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 # 54
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