Online Access Free CDCS Practice Test

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?

• A.Only when the racks might block access to the fire panel.
• B.No, cooling and design of racks have no influence on the fire suppression system design.
• C.Yes, the design of the racks has an influence on the fire suppression system design.
• D.Only when the rack height obstructs a potential fire suppression release point.

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

• A.Feed B
• B.The UPS will not synchronize to any of the feeds but use an internal clock to set the output voltage and frequency
• C.Feed A
• D.Depends on the setting of the UPS, as the UPS can normally be set to either feed

A data center requires an audit for ANSI/TIA-942 Rated-3 compliance. Will the network architecture be part of this audit?

• A.No, as concurrent maintainability only applies to electrical and mechanical
• B.No, only the type of cabling used will be audited
• C.Yes, but only if network administration does not comply with ANSI/TIA-606
• D.Yes, amongst other aspects the network architecture should be Rated-3 compliant with ANSI/TIA-942

What is a potential disadvantage of using a hypoxic-based fire suppression system as a fire extinguishing system?

• A.The gas containers need to be close to the hazard area.
• B.It can only be used in non-continuous occupied areas.
• C.It can only be used in computer rooms where you have sufficient positive pressure.
• D.It can only be used in computer rooms which have sufficient air changes per hour.

The humidity in the computer room has increased from about 60% up to 85% Relative Humidity (RH). What potential risk does this pose to your equipment?

• A.The risk of excessive wear and corrosion will increase
• B.There will be a cooling risk due to a high wet bulb temperature
• C.The electrostatic discharge (ESD) levels will go up
• D.No risks at all