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[Hardware] Excel in the Certification Exam With Real EXIN CDCP Questions

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【Hardware】 Excel in the Certification Exam With Real EXIN CDCP Questions

Posted at before yesterday 10:54      View：5 | Replies：0        Print      Only Author   [Copy Link] 1#
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EXIN CDCP Exam Syllabus Topics:
TopicDetails
Topic 1
  • Electro Magnetic Fields: The topic deals with effects of EMF on human health and equipment (H)EMP, standards, and EMF shielding solutions.
Topic 2
  • Auxiliary Systems: The topic covers water leak detection systems, data centre monitoring requirements, EMS, BMS and DCIM.
Topic 3
  • Cooling Infrastructure: The topic focuses on liquid immersion cooling, supplemental cooling options, sensible and latent heat definitions, and temperature and humidity recommendations.
Topic 4
  • Designing a Scalable Network Infrastructure: It covers ANSI
  • TIA-942 cabling hierarchy, network redundancy, structured Cabling System, and planning considerations.
Topic 5
  • Raised Floor
  • Suspended Ceiling: The topic discusses applicable standards, signal reference grid, and disability act and regulations.
Topic 6
  • Data Centre Location, Building and Construction: It focuses on appropriate sites and components of an effective data centre and supporting facilities setup.
Topic 7
  • Physical Security and Safety: Sub-topics are about physical security considerations and physical safety considerations.

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EXIN Certified Data Centre Professional (CDCP) Sample Questions (Q29-Q34):NEW QUESTION # 29
What is the recommended location for the Isolation Transformer in relation to the ICT-Equipment location?
  • A. The isolation transformer should be as close as possible to the ICT equipment but taking into account potential EMF.
  • B. The isolation transformer should be installed within the rack in which the ICT equipment has been installed.
  • C. The isolation transformer should be as far away as possible to the ICT equipment to avoid potential EMF.
  • D. The isolation transformer has to be installed within the power entry point of the building due to electrical code (regulation) requirements.
Answer: A
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 # 30
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 # 31
Which one of the following is a Natural Disaster?
  • A. Grid Failure
  • B. Blackouts
  • C. Hurricanes
  • D. Human Error
Answer: C
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 # 32
The expected time to Recover/Repair from a system from a failure is defined as.
  • A. MCBF
  • B. MLBF
  • C. MTBF
  • 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 # 33
Which one of the following is a device that uses circulating chilled water to remove heat?
  • A. Computer Room Air Suspension Unit (CRAS)
  • B. Computer Room Air System Unit (CRAS)
  • C. Computer Room Air Suppression Unit (CRAS)
  • D. Computer Room Air Handling Unit (CRAH)
Answer: D
Explanation:
A computer room air handling unit (CRAH) is a device that uses circulating chilled water to remove heat from the data center environment. A CRAH consists of a fan, a coil, and a filter. The fan draws the warm air from the data center and passes it through the coil, where the heat is transferred to the chilled water. The chilled water is supplied by a chiller or a cooling tower, and the cooled air is returned to the data center. A CRAH is different from a computer room air conditioning unit (CRAC), which uses a refrigerant instead of chilled water to cool the air.
References:
*EPI Data Centre Professional (CDCP) Preparation Guide, page 36
*Chilled Water Systems: Applications and Common Uses
*The Principles of Basic Refrigeration: What is a chiller?

NEW QUESTION # 34
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