최신 CDCS 무료덤프 - EXIN EPI Certified Data Centre Specialist

문제1

The location of a data center is just above the Arctic Circle (North Pole). The outside air temperature is never above 21°C/70°F.
Taking energy efficiency as the highest priority, which cooling system should you recommend?

A. Standard air conditioning units, as spares might not be readily available

B. Any cooling system can be efficient because the outside air temperature will not influence the temperature of the air intake of the ICT equipment

C. Airside economizer

D. Waterside economizer

정답: C

설명: (DumpTOP 회원만 볼 수 있음)

문제2

What is the advantage or disadvantage of using MPO (Multi-fiber Push On)/pre-terminated fiber?

A. There is no advantage, as it cannot be used with OM4 optical fiber cables.

B. It is a very flexible system as it can be used for both copper cables and optical fiber cables.

C. There is no advantage, as it creates additional heat load in the data center.

D. It speeds up installation and provides an easy upgrade to transmission speeds up to 40 Gbit/s -100 Gbit/s.

정답: D

설명: (DumpTOP 회원만 볼 수 있음)

문제3

When are the wet bulb and dry bulb temperatures identical?

A. When the relative humidity is at the best practice value for relative humidity, being 50% RH

B. When the dry bulb's temperature is at the highest allowable temperature for IT equipment as per ASHRAE

C. When the relative humidity is 100%

D. When the dry bulb's temperature is at the lowest allowable temperature for IT equipment as per ASHRAE

정답: C

설명: (DumpTOP 회원만 볼 수 있음)

문제4

Management has requested a 15-minute battery bank assuming full load on the UPS. The UPS vendor has provided the following specifications of the UPS:
* Rated power: 30 kVA
* Rectifier input voltage: 400 V/3 phase
* Rectifier input power factor: 0.8
* Battery rated voltage: 384 V
* Number of cells: 192
* End of discharge voltage: 308 V
* Inverter output voltage: 400 V/3 phase
* Inverter output power factor: 0.8
What information is missing to perform the battery calculation?

A. Inverter efficiency

B. Load imbalance on the phases

C. UPS efficiency

D. Available battery charging current

정답: C

설명: (DumpTOP 회원만 볼 수 있음)

문제5

When installing a raised floor, can we use a spirit level bar to level the floor?

A. Yes, but spirit level bars can only be used in the vertical plane.

B. Yes, using a spirit level bar for raised floors higher than 40 cm is preferred.

C. Yes, spirit level bars can be used as long as their length is longer than 60 cm/2 ft (the size of a typical raised floor tile).

D. No, because using a spirit level bar, a measurement error will be transferred from pedestal to pedestal.

정답: D

설명: (DumpTOP 회원만 볼 수 있음)

문제6

In which stage of the data center life cycle does commissioning take place?

A. Retire

B. Implement

C. Operate/optimize

D. Design

정답: B

설명: (DumpTOP 회원만 볼 수 있음)

최신 CDCS 무료덤프 - EXIN EPI Certified Data Centre Specialist

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