CDCP

Review 40 CDCP practice questions with answer explanations and community insights.

Question 1

What should be considered when using a direct air handler for a data centre?

  1. Cost of operation as power consumption on these units tend to be higher compared to traditional air conditioning technology.
  2. Temperature, humidity and contamination of the outdoor environment.
  3. Space available inside the computer rooms as the air handler space requirement for the inside the Computer room is quite large.
  4. The availability of three-phase power due to the high power requirements of these air handler units.

Question 2

Which of statements below is true?

  1. Single-mode cabling can use both LED and laser as a light source.
  2. Single-mode cabling is more expensive than multi-mode cabling.
  3. Multi-mode cabling can cross longer distances.
  4. Multi-mode cabling is more expensive than single-mode cabling.

Question 3

What level should the clean earth/ground resistance be for the data centre?

  1. < 1="" %="" of="" the="' line/phase="" to='" neutral="' voltage="' 1="" %="" of='"' the='" line/phase="" to="' neutral='">
  2. > 1 Ohm
  3. > 25 Ohm
  4. < 1=""ohm="' 1="">

Question 4

What type of heat does ICT equipment generate?

  1. Latent heat
  2. Sensible heat
  3. Both latent and sensible heat
  4. Radiant heat

Question 5

What is the main difference between an ATS and a STS?

  1. STS has a very fast switching time (e.g. less than 20 ms).
  2. STS has a slow switching time (e.g. more than 50 ms).
  3. STS is a make-before-break switch and an ATS is a break-before-make switch.
  4. STS is for high voltage and an ATS is for low voltage.
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