DU0-001 Data Center University Associate Certification Question and Answers

It improves electrical efficiency.

Shorter electrical conduit makes it easier to manage.

It is more resistant to physical accident in the data center.

It is compatible of with all makes and models of racks / enclosures.

Prevents harmonics from affecting the IT load

Provides a low-impedance electrical return path

Prevents electrical shock during maintenance and/or repair

Serves as a reference signal to the automatic transfer switch

Ensures circuit breakers trip before electrical malfunctions develop into fires

Tie wraps that are too tight

Vertical cable management

A bend radius that is too small

An overhead deployment with cables run in troughs

Side-to-side

Front-to-back

Back-to-front

Top-to-bottom

Row

Rack

Room

Building

Deployable with on a raised floor

Top or bottom airflow configuration

Cooling equipment occupies white space

Easily adaptable with changes in infrastructure

A cooling unit is located in the ceiling plenum to cool the data center racks.

A cooling unit is located within the rack itself to cool the contents of that rack.

A cooling unit utilizes perforated raised floor tiles to deliver cool air to the rack.

A cooling unit is located along the perimeter wall of the data center to cool a specific zone of racks.

Ground Fault Circuit Interrupter

General Facilities Cooling Index

Gaussian Filter Charge Indicator

Grounded Flaw Circuitry Installed

"Who are you?" and "Why are you here?"

"Who are you?" and "Where are you going?"

"Why are you here?" and "Where did you come from?"

"Where did you come from?" and "Where are you going?"

Cleaner burning fuel

No fuel storage problems

More hours of operation between engine overhauls

Less engine preventative maintenance requirements

It needs to be larger.

It needs to be smaller.

It decreases with the square of the current.

Nothing, since the voltage has not changed.

Emissions

Physical size

Output voltage

Fuel consumption

Defining owner roles

Monitoring of network traffic

Communicating data storage thresholds

Identifying the impact of individual component problems

Cage nuts

Vented shelves

Blanking panels

Cable managers

A battery

An inverter

A transfer switch

A single-phase input

Network cabling

Storage disk arrays

Rack-mounted UPS

Shelf-mounted tower servers

Enterprise management system (EMS) only

Network-critical physical infrastructure (NCPI) only

EMS and building management systems (BMS) through an NCPI element manager

Enterprise management system (EMS) and building management systems (BMS) with integrated backbone

Improved monitoring

Increased load capacity

Mixing of hot and cold air

Decreased lifecycle costs

EIA-310

UL 1778

CSA C22.2

NEBS GR-63-CORE

Star

Ring

Tree

Wheel

On ceilings

Below raised floors

In cable trays

Above drop down ceilings

Inside the power distribution unit

Inergen

FE-130

FM-200

Halon 1211

Reliability

Availability

Manageability

Maintainability

Radiation

Convection

Conduction

Evaporation

To remove transients from the power path

To detect and report power factor problems

To provide battery backup power should the utility fail

To convert from three-phase power to Single-phase power

Row

Rack

Room

Building

Earthquakes

Liquids

Dusty environments

Fire or excessive heat

Copper is generally less expensive than fiber for long runs.

Copper is generally less expensive than fiber for short runs.

Signals can be transmitted longer distances over copper than multi-mode fiber.

Signals can be transmitted longer distances over copper than single-mode fiber.

By improving natural air flow

By improving fire suppression

By allowing hot and cold air to mix together

By preventing hot and cold air from mixing together

It corrupts data on disk drives.

It triggers short circuits in power distribution units.

It creates airborne health hazards in the data center.

It corrodes internal computer components over time.

It limits the growth capacity of the data center.

It decreases the mean time to recover (MTTR).

It increases the number of single points of failure.

It drives excessive capital and maintenance expenses.

Seismic zone

Server dimensions

Available mounting units

Ambient room temperature

By installing TVSS devices

By installing RCD breakers in the PDU

By connecting bimetallic strips to all racks

By insulating IT equipment with rubber bushings

Voice over IP

Fire protection

Office supplies

Desktop application software

To increase the power factor as the load increases

To increase harmonics by stepping down the output

To regulate output voltage as the input voltage varies

To provide low impedance for switched mode power supplies

The fraction of time a system is unable to perform its intended function.

The likelihood that a system failure will occur for a specified time range.

The ability of a system to perform its required functions for a specified period of time.

The degree to which a system is accessible when required for use at an instant in time.

System + system

Parallel redundant

Isolated redundant

Distributed redundant

Class A

Class B

Class C

Class D

34 - 38 F (1 - 3 C)

44 - 48 F (6 - 9 C)

56 - 60 F (13 - 16 C)

70 - 74 F (21 - 23 C)

Star

Ring

Tree

Wheel

Pyramid

A set of cables twisted together

A cable with a connector terminated onto both ends

A 3-wire cable that is 12 feet (3.66 meters) in length

A bare cable that is ready to be assembled with its connectors

Hours

Percent

Distance

Currency

Lightning strikes

Generator switch-over

Air conditioner starting up

Electrostatic discharge (ESD)

Incipient

Back draft

Thermal flux

Intense heat

Visible smoke

A picture

A bar code

A silicon chip

An expiration date