Exin CDCS Certification Practice Questions & Answers

Question 6 of 59

In order to save energy, you are going to install an automated system to switch off lights.

What should be taken into consideration when installing such a system?

A.

Security guards should perform regular inspections verifying the system works.

B.

The system should not be based on motion detection as the lights might suddenly switch off while staff is still at work.

C.

It is not advisable to use such a system since it will reduce the lifetime of LED lighting.

D.

At all times the levels should allow for security cameras to function properly.

Question 7 of 59

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.

A.

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

B.

Install a passive harmonic filter on the UPS

C.

Install an active harmonic filter on the UPS

D.

Install an isolation transformer rated at K13 or K20

Question 8 of 59

What is a significant difference between a halocarbon gas-based fire suppression system and an inert gas-based fire suppression system?

A.

Inert gas has smaller-sized gas containers than halocarbon gas.

B.

Inert gas harms the environment and halocarbon gas does not.

C.

Halocarbon gas works on the basis of heat removal and inert gas works on the basis of oxygen reduction.

D.

Halocarbon gas works on the basis of oxygen reduction and inert gas works on the basis of heat removal.

Question 9 of 59

You are installing new copper cabling.

What is the advantage or disadvantage of choosing pre-terminated category 6 or 6A cabling?

A.

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

B.

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

C.

Pre-terminated cabling has a higher fire rating.

D.

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 10 of 59

You are allowed to use a calculator for this question.

A computer room has a net volume of approximately 2,500 m3/88,287 ft3.
The temperature is 20 °C/68 °F.
The required design concentration is 7%.
The S-Factor is 0.1359 (metric)/1.885 (imperial).

Calculate the amount of gas required for this computer room based on FM200.

What is the correct weight?

A.

Approximately 410 kg/900 lbs

B.

Approximately 820 kg/1,800 lbs

C.

Approximately 1,390 kg/3,000 lbs

D.

Approximately 1,640 kg/3,600 lbs