최신 CDCS 무료덤프 - EXIN EPI Certified Data Centre Specialist

문제1

An air-conditioner unit needs to be selected. Two types are available:
Unit-A has a Sensible Heat Ratio (SHR) of 0.7.
Unit-B has a Sensible Heat Ratio (SHR) of 0.9.
From an efficiency point of view, which one should be selected?

A. Unit A

B. Not relevant, as Sensible Heat Ratio is only specified for air-conditioner equipment to indicate the ratio between intake temperature and exhaust temperature.

C. Unit B

D. It does not matter, as the Sensible Heat Ratio has nothing to do with efficiency.

정답: C

설명: (DumpTOP 회원만 볼 수 있음)

문제2

The pipes of a VESDA smoke detection system are installed at the air intake of the air conditioner inside the computer room.
Is this a good practice from an early smoke detection point of view?

A. It depends on the type of gas-based fire suppression which will be installed.

B. No, it will give a longer reaction time for the smoke detection system and there might also be bypass airflow.

C. Yes, as this reduces the amount of piping to be installed in the data center, as all air will go through the air conditioner.

D. No, the piping should be installed at the air exhaust of the air conditioner, as there can also be a fire inside the air conditioner itself.

정답: B

설명: (DumpTOP 회원만 볼 수 있음)

문제3

A computer room with a raised floor has been designed with racks in a hot/cold aisle setup.
What should you recommend for the placement of down-flow air conditioners?

A. Air conditioners perpendicular to (at the end of the row of) the Hot-Aisle

B. Air conditioner placement has no influence on cooling effectiveness and efficiency. Hence, they can be placed at any convenient location.

C. Air conditioners should always be placed at both sides of each row of racks

D. Air conditioners perpendicular to (at the end of the row of) the Cold-Aisle

정답: D

설명: (DumpTOP 회원만 볼 수 있음)

문제4

What precaution shall be taken for cabling leading into an equipment rack when a data center is in a seismic-prone area?

A. Cables shall be tightly organized to the rack and trays to avoid movement.

B. Cables should be replaced by busbar trunking.

C. Cables can be organized in any way as it is not important.

D. Cables should be loosely organized to allow for movement and be latched at the connectors.

정답: A

설명: (DumpTOP 회원만 볼 수 있음)

문제5

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)

문제6

The 'maximum exposed area' of the fire-rated glass is defined by the supplier as 3 sqm/32 sqft. The window area is 4 sqm/43 sqft.
What would be the best option?

A. Split the window in two equal parts fitted together with transparent silicon glue.

B. Split the window in two equal parts using an aluminum frame.

C. Split the window into parts smaller than specified as the maximum exposed area and ensure fire-rated frames are used.

D. Do not use fire-rated glass due to the size limit and replace it with normal glass.

정답: C

설명: (DumpTOP 회원만 볼 수 있음)

최신 CDCS 무료덤프 - EXIN EPI Certified Data Centre Specialist

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