CDCS Certification – Valid Exam Dumps Questions Study Guide! (Updated 122 Questions) [Q29-Q52]

NEW QUESTION 29
When designing a data center network, your company wants to minimize the number of network cables to install. What type of physical cabling layout would be the best choice?

Top of Rack (ToR) design

End of Row (EoR) design

Star network design using coaxial cables

It does not matter as the number of switches is not influenced by the physical cabling layout

NEW QUESTION 30
Which efficiency indicator accounts for all cooling costs (installation, operation, disposal)?

HER

COP

PUE

LCC

NEW QUESTION 31
What is forced entry resistance based on?

Time, tools, and people

Rate and installed number of CCTV cameras

Building materials used and the location of the data center

The number of security guards on duty

NEW QUESTION 32
What is the calculation for the desired attenuation factor for shielding material?

A = 20 log (M / R)
Where
A is Attenuation
M is the maximum acceptable value
R is the real value measured

A = M / R
Where

A is Attenuation
M is the maximum acceptable value
R is the real value measured

A = 20 log (R / M)
Where
A is Attenuation
R is the real value measured
M is the maximum acceptable value

You do not have to calculate the attenuation factor for shielding material as it always has the same attenuation

NEW QUESTION 33
The UPS of a data center with ANSI/TIA-942 Rating-4 is installed with the rectifier connected to power feed A and the bypass/reserve input connected to power feed B. To which feed will the UPS output be synchronized?

Feed A

Feed B

The UPS will not synchronize to any feed but use an internal clock

Depends on UPS settings, as it can be set to either feed

NEW QUESTION 34
A 5kW (power consumption) server keeps crashing with the message ‘temperature too high’.
The intake temperature is measured at 25 °C/77 °F and a relative humidity (RH) level of 50%.
The exhaust temperature is 29 °C/84 °F and 45% RH.
The raised floor is providing an adequate amount of CFM/CMH at a reasonable velocity.
The pressure under the raised floor is approximately 25 Pa/0.1 inch H#O.
Analyze the situation and indicate what the most likely cause is for this server to crash.

Dust inside the server causing issues with convection-based heat transfer

The exhaust temperature is exceeding the ASHRAE recommended values

The raised floor pressure is too low and/or the raised floor tile % opening is not adequate

No cause could be determined as the CFM/CMH of the air conditioning equipment is not stated

NEW QUESTION 35
A computer room is fitted with a hypoxic-based fire suppression system. On what principle does it work?

It removes the heat from the fire

It lowers the oxygen levels in the room

It removes the fuel from the fire

It uses water as an extinguisher

NEW QUESTION 36
The temperature in the computer room is increased from 18 °C (64 °F) to 27 °C (81 °F). What is the impact on the amount of gas required to suppress a fire assuming a halocarbon agent?

The amount of gas required will be higher

The amount of gas required will not change

The amount of gas required will be less

The change cannot be determined without knowing the change in humidity as well

NEW QUESTION 37
Which of the following statements is correct?

With current increasing, single-phase cables emit more EMF than three-phase cables

With current decreasing, three-phase cables emit more EMF than single-phase cables

With voltage increasing, single-phase cables emit more EMF than three-phase cables

With voltage decreasing, three-phase cables emit more EMF than single-phase cables

NEW QUESTION 38
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?

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

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

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

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

NEW QUESTION 39
Which gas-based system in general requires a larger amount of gas in order to be effective, a halocarbon gas- based fire suppression system or an inert gas-based fire suppression system?

Inert gas requires a smaller amount of gas compared to halocarbon gas

Inert gas requires a larger amount of gas compared to halocarbon gas

Inert gas and halocarbon gas require the same amount of gas

Impossible to answer without knowing the temperature

NEW QUESTION 40
The logical overview of the data center looks as pictured. To what TIA-942 Rating is this design made based on electrical only?

Rating – 4

Rating – 3

Rating – 2

Rating – 1

NEW QUESTION 41
The noise levels in the data center are approximately 91 dB (A).
Do employers need to take precautions?

No, anything less than 100 dB (A) is acceptable.

There are no regulations regarding noise levels inside a building. Regulations only apply to noise pollution outside of the building.

As long as the data is compliant to ISO/IEC 27001 it is acceptable.

Yes, since it is mandated by regulations.

NEW QUESTION 42
ICT rack consumes 3 kW with #T ~11 °C (20 °F). Calculate required airflow (CFM).

~1,500 CFM

~1,000 CFM

~500 CFM

~160 CFM

NEW QUESTION 43
A computer room needs to be fitted out with a gas-based fire suppression system. The computer room will be a high-density data center with about 30% of the racks being closed circuit cooling blade-center racks.
Should the supplier of the fire suppression system be informed on the design of the racks?

No, cooling and design of racks have no influence on the fire suppression system design.

Only when the rack height obstructs a potential fire suppression release point.

Yes, the design of the racks has an influence on the fire suppression system design.

Only when the racks might block access to the fire panel.

NEW QUESTION 44
When installing a raised floor, can we use a spirit level bar to level the floor?

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).

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

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

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

NEW QUESTION 45
What indicates the breaking capacity of a fuse or breaker?

Mechanical strength of the casing of a fuse or breaker.

The maximum voltage, in case of an electrical surge, that the fuse or breaker can handle without being destroyed or causing an electric damaging arc.

The current at which the device will trip.

The current that a fuse or breaker is able to interrupt without being destroyed or causing an electric damaging arc.

NEW QUESTION 46
You want to manage temperature and humidity only at the facility level in your data center. All servers use front-to-rear airflow. Which location for measurement should you recommend?

At the back/rear of the server at 50 mm (2 in)

At 1.5 m (5 ft) above the floor, 0.4 m (15 in) in front of the rack

At the front/intake of the server at 50 mm (2 in)

At 1.5 m (5 ft) above the floor, 0.4 m (15 in) at the back of the rack

NEW QUESTION 47
A sprinkler system employs automatic sprinklers attached to a piping system containing water and connected to a water supply so that water discharges immediately when a head opens. What is this called?

Dry pipe system

Deluge system

Pre-action system

Wet pipe system

NEW QUESTION 48
FM-200 is phasing out as a halocarbon gas and management has decided to replace this with the more environmentally friendly Novec-1230 gas. Should you use exactly the same formula and parameters to calculate the gas content for the Novec-1230 gas?

Yes, as long as the temperature in the computer room has not changed

Yes, if you take the difference between the net and gross volume into account

Yes, as long as you use the same units of measure (kg/m³ or lbs/ft³)

Yes, if you change the S-factor of the formula to reflect the gas type used

NEW QUESTION 49
What is the minimum requirement for the power feeds to the building for a Rated-3 data center based on the ANSI/TIA-942 standard?

Two feeds coming from two different substations, one power company is not acceptable

Two feeds coming from two different substations, one power company is acceptable

Two feeds entering the data center building from one substation

One feed from one substation split over two separated distribution boards in separate rooms

NEW QUESTION 50
You are working with a customer who requires a guarantee that THDi levels coming from the UPS should not exceed more than 3% THDi. Furthermore, he wants to run a power-efficient data center. The UPS has a 6- Pulse SCR/Thyristor based rectifier. The current load on the UPS is approximately 80%. The customer indicates they are not expecting any changes on the ICT infrastructure for the next 3 years.
What should you recommend?

Nothing, the UPS will be able to take care of the right levels of THDi

Install a passive harmonic filter on the UPS

Install an active harmonic filter on the UPS

Install an isolation transformer rated at K13 or K20

NEW QUESTION 51
What is a potential disadvantage of using water mist as a fire extinguishing system?

It only uses 10% of the water normally used in a water-based fire suppression, which might not be enough to suppress the fire

It will rapidly increase the humidity level in the data center, which can cause a potential risk for the operation of the equipment

It extracts oxygen from the air creating a potential risk for humans inside the computer room

It has droplets that are too small (100-120 microns) so it can only be used for small fires

NEW QUESTION 52
The building in which the computer room is housed is required to have a sprinkler system. The building is therefore equipped with a wet pipe system.
What action, if any, should you recommend for the computer room?

Maintain the current wet pipe system.

Replace the wet pipe system with a deluge system.

Replace the wet pipe system with a dry pipe system.

Replace the wet pipe system with a pre-action system.

CDCS Certification – Valid Exam Dumps Questions Study Guide! (Updated 122 Questions) [Q29-Q52]

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