Online Access Free CDCS Exam Questions

EMF shielding material needs to be installed as EMF levels from the transformer room into the computer room are measured at 100 mG. The transformer room is ~10 meters away, separated by a corridor. Where should shielding be installed?

• A.As close as possible to the transformer room
• B.It does not matter; either close to the transformer room or computer room is okay
• C.Shielding is not required as 100 mG is within acceptable levels
• D.As close as possible to the computer room

A new facility requires electrical distribution of 100A to be installed in the computer room, 1 m (3 ft) above sensitive IT equipment. What type of system minimizes EMF impact?

• A.Install single-phase power cabling
• B.Install bus bar trunking
• C.Install three-phase power cabling based on three individual core wires
• D.Install three-phase power cabling based on a combined cable (e.g., XLPE)

What indicates the overcurrent of a fuse or breaker?

• A.The current at which the device will trip
• B.The maximum inrush current an overcurrent protection device can handle within a defined period of time
• C.The current that a fuse or breaker is able to interrupt without being destroyed or causing an electrically damaging arc
• D.The maximum electrical current which can flow in a particular electrical system under short-circuit conditions; it is determined by the voltage and impedance of the supply system

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

• A.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).
• B.Yes, but spirit level bars can only be used in the vertical plane.
• C.No, because using a spirit level bar, a measurement error will be transferred from pedestal to pedestal.
• D.Yes, using a spirit level bar for raised floors higher than 40 cm is preferred.

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 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.
• 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 is already factory tested and saves installation time.
• D.Pre-terminated cabling has a higher fire rating.