Oct-2025 FREE EXIN CDCP PRACTICE QUESTIONS AND ANSWERS UPDATES
DEMO FREE BEFORE YOU BUY CDCP DUMPS
EXIN CDCP Exam Syllabus Topics:
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NEW QUESTION # 22
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 for twisted pair network cabling is for physical protection against vandalism and accidental cutting of the cable.
- D. No, the shielding is designed for alien cross-talk between network cables, it provides no or little protection against low frequency EMF.
Answer: D
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 # 23
What is a potential risk when using floor mounted cool air ducting systems?
- A. Using floor mounted cool air ducting systems will increase the Computer room relative humidity.
- B. There are no risks when using floor mounted cool air ducting systems.
- C. Using floor mounted cool air ducting systems will increase the Computer room temperature
- D. The neighboring racks could have a potential cooling impact.
Answer: D
Explanation:
Floor mounted ducting can cause uneven cooling, potentially leading to overcooling or undercooling of adjacent racks, which affects performance and reliability.
References:
CDCP Exam Preparation Guide, Cooling
NEW QUESTION # 24
Which one of the following is an AC Power Quality Anomaly?
- A. Waveform Distortion
- B. Signal Distortion
- C. Backup Condition
- D. Attenuation
Answer: A
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 # 25
Measuring "Business Values" begins first with.
- A. Network
- B. Budget
- C. Topology
- D. Physical Infrastructure
Answer: B
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 # 26
Looking from within the Computer room, what should the door-swing (opening) direction be?
- A. Depends on the type of Computer room
- B. Inwards, code permitted
- C. Outwards, code permitted
- D. Instead of swinging doors, sliding doors are preferred
Answer: C
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 # 27
Which type of Humidifier is composed of water-filled canister containing electrodes?
- A. Steam Canister Humidifier
- B. Infrared Humidifiers
- C. Ultrasonic Humidifier
- D. Water Canister 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 # 28
What are the four main components of a refrigeration circuit?
- A. Evaporation, membrane filter, monitor sensor, pressure valve
- B. Thermostat, monitoring interface, indoor unit, outdoor unit
- C. Condenser, expansion valve, buffer tank, de-icing unit
- D. Evaporator, compressor, condenser, expansion valve
Answer: D
Explanation:
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
NEW QUESTION # 29
The expected time to Recover/Repair from a system from a failure is defined as.
- A. MLBF
- B. MTBF
- C. MCBF
- D. MTTR
Answer: D
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 # 30
When dealing with glass door racks, cool air is injected into the rack from:
- A. The bottom of the rack.
- B. The front door in a downflow direction.
- C. The rear door in a downflow direction.
- D. The top of the rack through the fans and vents mounted inside the rack.
Answer: C
Explanation:
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.
NEW QUESTION # 31
Which source is used in fiber cable to transmit data?
- A. Light
- B. Signals
- C. Pulse
- D. Electric
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 # 32
Escape route signage should be placed where?
- A. At every door including riser doors, doors of storage closets etc.
- B. Only at the main entrance of the data centre building
- C. Only at emergency escape doors
- D. At every door providing a pathway
Answer: D
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 # 33
Which one of the following is the last stage in Stages of Combustion?
- A. Incipient
- B. Intense Heat
- C. Visible Smoke
- D. Flaming Fire
Answer: D
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 # 34
What is the main advantage of busbar trunking compared to stand electrical cabling?
- A. Busbar trunking is less expensive.
- B. Busbar trunking allows for flexibility.
- C. Busbar trunking has a fixed power rating.
- D. Busbar trunking can be located both overhead and under the raised floor.
Answer: B
Explanation:
Busbar trunking systems are a method of power distribution using rigid copper or aluminium conductors to distribute the power around a building. Busbar trunking systems have many advantages over cables, such as lower space requirements, higher short-circuit strength, lower fire load, and easier installation. One of the main advantages of busbar trunking is that it allows for flexibility in terms of power transmission and distribution.
Busbar trunking systems can be easily relocated, modified, or expanded to accommodate changes in the building layout or load demand. Busbar trunking systems can also be fitted with various components, such as tap-off units, elbows, tees, and end feed units, to provide power to different locations and consumers. Busbar trunking systems can also be installed both overhead and under the raised floor, depending on the design and preference of the building.
References: Why I prefer busbar trunking systems more than cables | EEP, Why should you choose Busbar over Cable? - E+I Eng, Busbar VS Cables for Riser Applications - An Electrical Engineer.
NEW QUESTION # 35
What is a requirement of an FM200 (HFC-227) installation?
- A. Drainage system under the raised floor.
- B. Install pre-action sprinklers in the same room as the FM200.
- C. It is a high-pressure gas; therefore nozzles must be mounted with two brackets.
- D. Install the gas containers (tanks) close to the data centre.
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
NEW QUESTION # 36
When having two non-synchronized power sources, the ATS / STS need to be of the type:
- A. Make before break.
- B. Break before make.
- C. Both make before break or break before make can be used.
- D. Both an ATS and STS can never handle two non-synchronized sources.
Answer: B
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 # 37
Which type of Fire Detection Device is recommended for protecting a Data Center?
- A. Heat detector
- B. None of the above
- C. Flame detector
- D. Smoke detector
Answer: D
Explanation:
According to the CDCP Preparation Guide, smoke detectors are the most common type of fire detection devices used in data centers, as they can detect a fire in its early stages and provide early warning to the occupants and authorities. Smoke detectors can be either spot-type or air-aspirating, depending on the design and goals of the data center. Spot-type detectors are inexpensive and simple, but may cause activation delay and false alarms. Air-aspirating detectors are more sensitive and reliable, but may require more maintenance and installation costs. Both types of detectors should be installed in accordance with the relevant standards and codes, such as NFPA 72 and EN 54.
References: CDCP Preparation Guide, page 30-31. Evaluating Fire Detection Options For Data Centers.
Fire Detection and Suppression Systems in a Data Center.
NEW QUESTION # 38
What is the recommended location for the Isolation Transformer in relation to the ICT-Equipment location?
- A. The isolation transformer has to be installed within the power entry point of the building due to electrical code (regulation) requirements.
- B. The isolation transformer should be as close as possible to the ICT equipment but taking into account potential EMF.
- C. The isolation transformer should be as far away as possible to the ICT equipment to avoid potential EMF.
- D. The isolation transformer should be installed within the rack in which the ICT equipment has been installed.
Answer: B
Explanation:
According to the EPI Data Centre Training Framework, an isolation transformer is a device that transfers electrical power from one circuit to another without changing the voltage or frequency, but providing galvanic isolation1. Galvanic isolation means that there is no direct electrical connection between the input and output circuits, which can prevent ground loops, reduce noise, and improve safety2. An isolation transformer can also provide voltage stepdown or stepup, create a local ground-bonded neutral, reduce harmonic currents, and provide taps for abnormal mains voltage3.
The location of the isolation transformer in relation to the ICT equipment depends on the purpose and design of the transformer. In general, the isolation transformer should be as close as possible to the ICT equipment, but taking into account potential EMF4. EMF is a form of electromagnetic interference (EMI) that can affect the performance and reliability of the ICT equipment5. The closer the isolation transformer is to the ICT equipment, the shorter the cable length and the lower the voltage drop and power loss4. However, the isolation transformer should also be far enough from the ICT equipment to avoid EMF, which can be reduced by using proper shielding, grounding, and spacing5.
The isolation transformer should not be installed as far away as possible to the ICT equipment, as option B suggests, because this would increase the cable length and the voltage drop and power loss4. The isolation transformer does not have to be installed within the power entry point of the building, as option C suggests, because this is not a requirement of the electrical code or regulation, and it may not be optimal for the data centre power system. The isolation transformer should not be installed within the rack in which the ICT equipment has been installed, as option D suggests, because this would increase the heat load and the noise level in the rack, and it may not fit in the rack space.
References: 1: EPI Data Centre Training Framework, Module 5: Power, Section 5.4.3: Isolation Transformers, Page 5-38 2: Guidelines for using isolation transformers in data center UPS systems - EEP1, Page 1 3: The Role of Isolation Transformers in Data Center UPS Systems2, Page 2 4: Data Center Transformer | Power Distribution - FGC Construction3, Page 1 5: EPI Data Centre Training Framework, Module 5: Power, Section
5.4.1: Electromagnetic Interference, Page 5-34 : Data centre transformers manufacturers - TMC Transformers4, Page 1 : The Role of Isolation Transformers in Data Center UPS Systems2, Page 25
NEW QUESTION # 39
systems are designed specifically to protect the structure of a building.
- A. Total Flooding
- B. Water sprinkler
- C. Pro-inert
- D. Inergen
Answer: B
Explanation:
Water sprinkler systems are designed to protect the structure of a building from fire by suppressing or extinguishing the flames with water. Water sprinkler systems are typically installed in the ceiling or walls of a building and are activated by heat or smoke detectors. Water sprinkler systems can reduce the risk of fire spreading and causing structural damage to the building.
References:
*EPI Data Centre Professional (CDCP) Preparation Guide, page 28
*Fire Protection Systems for Data Centers | EPI
NEW QUESTION # 40
What is the minimum clearance space required below water sprinkler heads and nozzles of gas-based fire suppression systems?
- A. 120 cm / 47 inches
- B. 60 cm / 24 inches
- C. 64 cm / 25 inches
- D. 46 cm / 18 inches
Answer: D
Explanation:
The minimum clearance space required below water sprinkler heads and nozzles of gas-based fire suppression systems is 46 cm / 18 inches, according to the CDCP Preparation Guide1 and OSHA regulation 29 CFR
1910.159 © (10)2. This clearance space is necessary to ensure that the sprinkler spray or gas discharge can reach the fire and cover the protected area effectively. Any material or obstruction below this clearance space can interfere with the sprinkler or gas distribution and reduce the fire suppression performance. Therefore, building owners and managers should ensure that all storage and objects in the data centre are kept below this clearance space, and that the clearance space is maintained at all times.
References:
1: CDCP Preparation Guide, page 24, section 2.4.3 2: Clarification of OSHA regulation 29 CFR
1910.159©(10), Sprinkler ...3, page 1, section 1
NEW QUESTION # 41
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.
Answer: B
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 # 42
Which of statements below is true?
- A. Single-mode cabling can use both LED and laser as a light source.
- B. Multi-mode cabling is more expensive than single-mode cabling.
- C. Single-mode cabling is more expensive than multi-mode cabling.
- D. Multi-mode cabling can cross longer distances.
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 # 43
The termination of the ability of a product to perform its required function can be defined as.
- A. Failure
- B. Termination
- C. Obstacle
- D. Hindrance
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 # 44
Which Class of Fire involves combustible metals or combustible metal alloys such as magnesium, sodium and potassium?
- A. Class A
- B. Class D
- C. Class C
- D. Class B
Answer: B
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 # 45
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