Question No 1

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?

Choose the Choices:

Question No 2

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?

Choose the Choices:

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

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

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.

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

Question No 3

You need to determine the strategy for the cooling audit. All the servers are based on a front - to - rear (F - R) airflow design. Which location for the temperature/humidity measurement should you recommend for the audit?

Choose the Choices:

At the back/rear of the server at 50 mm/2 inch

At 1.5 meters/5 feet above the floor in the middle of the cold aisle

At the front/intake of the server at 50 mm/2 inch

At 1.5 meters/5 feet above the floor in the middle of the hot aisle

Question No 4

You are installing new copper cabling. What is the advantage or disadvantage of choosing pre - terminated category 6 or 6A cabling?

Choose the Choices:

Pre - terminated cabling is already factory tested and saves installation time.

There is no advantage as most new copper cabling network designs are based on category 3 or 5E for horizontal cabling.

Pre - terminated cabling has a higher fire rating.

Pre - terminated cabling makes ordering of the copper cables more complex, as you need to know in advance on which side the male or female connector needs to be located.

Question No 5

When are the wet bulb and dry bulb temperatures identical?

Choose the Choices:

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

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

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

When the relative humidity is 100%

Practice Exin CDCS Exam Questions

Question No 1

Question No 2

Question No 3

Question No 4

Question No 5

CDCS Exam Features

CDCS PDF Dumps