Online Access Free CDCS Practice Test

Where should raised-floor installation start?

• A.Point C (center of the room)
• B.Point A (entrance corner)
• C.Point D (corner opposite entrance)
• D.Point B (side wall)

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?

• A.It depends on the type of gas-based fire suppression which will be installed.
• B.Yes, as this reduces the amount of piping to be installed in the data center, as all air will go through the air conditioner.
• C.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.
• D.No, it will give a longer reaction time for the smoke detection system and there might also be bypass airflow.

What is the advantage of using Multi-fiber Push-On (MPO) connectors?

• A.Allows a single connector with multiple fibers running parallel, enabling easy upgrade to 40-100 Gbit/s
• B.Very flexible, can be used for both copper and optical fiber
• C.No advantage, cannot be used with OM4 fiber
• D.Made of high-quality materials, reusable without risk

You want to make cooling more effective by setting cold aisle temperature to 4 °C (39 °F). Is this acceptable?

• A.Yes, as long as dewpoint doesn't go below -9 °C (16 °F)
• B.Yes, but only if cooling systems can maintain this continuously
• C.No, 4 °C (39 °F) is below the allowable ASHRAE range
• D.No, intake air must be exactly 20 °C (68 °F)

Should aerosol cleaning solutions be used in the computer room?

• A.No, unless leak detection installed
• B.No, it will contaminate the room
• C.Yes, only if room smells bad
• D.Yes, if not connected to power