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DU0-001 Sample Questions Answers

Questions 4

What is a function of a transformer in a line interactive UPS?

Options:

A.

To increase the power factor as the load increases

B.

To increase harmonics by stepping down the output

C.

To regulate output voltage as the input voltage varies

D.

To provide low impedance for switched mode power supplies

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Questions 5

What two characteristics can result in poor performance of network cables? (Choose two.)

Options:

A.

Tie wraps that are too tight

B.

Vertical cable management

C.

A bend radius that is too small

D.

An overhead deployment with cables run in troughs

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Questions 6

"The degree to which a system or component is operational and accessible when required for use" is the definition for which term?

Options:

A.

Reliability

B.

Availability

C.

Serviceability

D.

Maintainability

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Questions 7

Which suppression system is most common in existing data centers?"

Options:

A.

Water sprinkler system

B.

Halon total flooding system

C.

Carbon dioxide total flooding system

D.

Water mist mercury switch sensor system

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Questions 8

Which two types of cables would you expect to see used in a network backbone?(Choose two.)

Options:

A.

Power cables

B.

Fiber optic cables

C.

Category 5/5e/6a cables

D.

Audio / video cables

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Questions 9

You are asked to assess a data center's risk of fire. Upon a visual inspection of the data center you notice several areas of concern.

Which two should you address? (Choose two.)

Options:

A.

Acoustic foam

B.

Trash receptacle

C.

Plenum rated cables

D.

Recessed sprinkler heads

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Questions 10

Which component of a line interactive UPS increases its battery life?

Options:

A.

Dual mains input

B.

Voltage regulating transformer

C.

Low impedance DC disconnect

D.

High impedance battery charge circuit

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Questions 11

Which two does the network-critical physical infrastructure (NCPI) management system monitor at the rack level? (Choose two.)

Options:

A.

The monitoring of a chiller at the rack level.

B.

The monitoring of comfort cooling at the rack level.

C.

The monitoring of supplemental cooling devices at the rack level.

D.

The monitoring of rack based transfer switches at the rack level.

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Questions 12

Which relative humidity range is considered optimal in data centers?

Options:

A.

25-40%

B.

40-55%

C.

55-70%

D.

70-85%

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Questions 13

Which air conditioning system must have a one-to-one relationship between the indoor unit and the outdoor heat exchanger?

Options:

A.

Air cooled systems

B.

Chilled water systems

C.

Water cooled systems

D.

Glycol cooled systems

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Questions 14

Which type of application typically utilizes an enclosure wider than 600 mm?

Options:

A.

Network cabling

B.

Storage disk arrays

C.

Rack-mounted UPS

D.

Shelf-mounted tower servers

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Questions 15

What are two causes of impulsive transients? (Choose two.)

Options:

A.

Lightning strikes

B.

Generator switch-over

C.

Air conditioner starting up

D.

Electrostatic discharge (ESD)

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Questions 16

What is the unit of measurement of the electrical resistance of a circuit?

Options:

A.

Volt

B.

Amp

C.

Ohm

D.

Frequency

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Questions 17

Which three fuels are used to power a generator? (Choose three.)

Options:

A.

Glycol

B.

Diesel

C.

Gasoline

D.

Methanol

E.

Natural gas

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Questions 18

Which scenario illustrates a data center's agility?

Options:

A.

A data center is built out to final design capacity.

B.

A data center is designed with one hour of runtime.

C.

A data center is designed with interchangeable power distribution.

D.

A data center is configured with 50% AC power and 50% DC power in anticipation of loads.

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Questions 19

Which external factor will affect the level of moisture in the data center?

Options:

A.

Outside temperature

B.

Outside barometric air pressure

C.

Outside air coming in to supplement cooling

D.

Chilled water being pumped down from the roof

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Questions 20

Data cabling infrastructure consists of which broad categories of cable?

Options:

A.

Data cables and power cables

B.

Fiber cables and copper cables

C.

Solid cables and stranded cables

D.

Category (CAT) 5 cables and category (CAT) 6 cables

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Questions 21

Based on individual network IP addresses, an enterprise management system (EMS) handles which type of information?

Options:

A.

Device centric

B.

Network centric

C.

Element centric

D.

Data point centric

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Questions 22

Which statement is a recognized characteristic of single-phase power?

Options:

A.

Single-phase power excludes the use of three-phase power in the data center.

B.

Single-phase power provides an effective means for delivering DC power to the data center.

C.

Single-phase power is an effective choice of power supply when data center users require large volumes of power.

D.

Single-phase power implies that power comes into the data center with one "hot" wire, along with accompanying neutral and ground.

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Questions 23

Click the Exhibit button.

What type of power problem does the exhibit illustrate?

Options:

A.

Harmonics

B.

Overvoltage

C.

Overcurrent

D.

Impulsive transient

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Questions 24

What is the core management component of any fire protection system?

Options:

A.

Fire control panel

B.

Intelligent smoke detector

C.

Energy management system

D.

Building management system

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Questions 25

What are two key characteristics of a UPS? (Choose two.)

Options:

A.

It tests voltages on IT equipment.

B.

It safeguards data in the event of a power loss.

C.

It measures energy consumption of IT equipment.

D.

It transfers IT equipment from utility to battery power.

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Questions 26

Which two choices would ease the maintenance and serviceability of equipment in a data center? (Choose two)

Options:

A.

Underfloor cabling

B.

Proper cable management

C.

Split rear doors to allow for easier access

D.

Unique enclosures to meet specific equipment needs

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Questions 27

Planned downtime is necessary for many data centers. management tools that ignore planned downtime can have which consequence?

Options:

A.

Spurious alerts leading to incorrect actions by personnel

B.

Insufficient runtime specifications for blade server deployments

C.

Downtime that can result from individual components failing

D.

Reduction in the training and knowledge that is necessary to maintain the NCPI system

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Questions 28

Which method transfers heat by electromagnetic waves?

Options:

A.

Radiation

B.

Convection

C.

Conduction

D.

Evaporation

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Questions 29

What characteristic is common to all cooling architectures?

Options:

A.

Deployable with on a raised floor

B.

Top or bottom airflow configuration

C.

Cooling equipment occupies white space

D.

Easily adaptable with changes in infrastructure

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Questions 30

Which is an example of a rack-oriented cooling architecture?

Options:

A.

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

B.

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

C.

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

D.

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

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Questions 31

Which method will allow IT and Facilities to monitor every aspect of the data center?

Options:

A.

Enterprise management system (EMS) only

B.

Network-critical physical infrastructure (NCPI) only

C.

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

D.

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

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Questions 32

Click the Exhibit button.

This picture illustrates which type of cooling architecture?

Options:

A.

Rack

B.

Row

C.

Room

D.

Building

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Questions 33

Which NCPI change management challenge is faced when optimizing business agility?

Options:

A.

Maximizing the ratio of rack efficiency to cost over runs.

B.

Maximizing the ratio of the UPS to batteries needed for uptime.

C.

Maximizing the ratio of planned to unplanned work in a data center.

D.

Maximizing the ratio of leak detection to computer room air conditioners.

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Questions 34

What function do patch panels serve in a data center?

Options:

A.

They convert Internet protocols (IP).

B.

They convert copper signals into fiber optic light signals.

C.

They serve as a demarcation point where ends of bulk cable converge.

D.

They improve the data cable signal capacity from 100 Base-T to 10 Gigabyte Ethernet.

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Questions 35

What is a common concern when specifying the depth of a rack / enclosure?

Options:

A.

Seismic zone

B.

Server dimensions

C.

Available mounting units

D.

Ambient room temperature

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Questions 36

How does a rack-mounted side air distribution unit improve air flow?

Options:

A.

It pulls air from cold aisles and directs it to side equipment inlets.

B.

It pulls air from the sides of the enclosure and directs it through the top.

C.

It pulls air from the sides of the enclosure and directs it to the hot aisles.

D.

It pulls air from the raised floor and directs it through the sides of the enclosure.

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Questions 37

What aspect of standby power generation is highly regulated by governmental bodies?

Options:

A.

Emissions

B.

Physical size

C.

Output voltage

D.

Fuel consumption

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Questions 38

What are three transformer types? (Choose three.)

Options:

A.

Step-up transformer

B.

Isolation transformer

C.

Step-down transformer

D.

Delayed input transformer

E.

Limited induction transformer

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Questions 39

Which two describe an air sampling smoke detection system? (Choose two.)

Options:

A.

It is made up of a network of pipes.

B.

It uses magnetic resonance imaging.

C.

It is generally located in wiring closets.

D.

It automatically compensates for changing environments.

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Questions 40

What are two primary challenges for optimizing lifecycle costs with regard to rack systems? (Choose two.)

Options:

A.

Structural integrity

B.

Non-standardized racks

C.

Slow speed of deployment

D.

Floor space requirements

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Questions 41

What is a limiting factor when specifying the height of a rack / enclosure?

Options:

A.

Cable capacity

B.

Cooling requirements

C.

Overhead fire sprinklers

D.

Enclosure door clearance

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Questions 42

Which two clean agents are commonly specified for data center fire suppression? (Choose two.)

Options:

A.

Inergen

B.

FE-130

C.

FM-200

D.

Halon 1211

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Questions 43

What are three power distribution components found in data centers? (Choose three.)

Options:

A.

Ground loop

B.

Branch circuit

C.

Metered outlet strip

D.

Power distribution unit (PDU)

E.

Valve regulated lead acid (VRLA) battery

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Questions 44

Why are frequency variations a small concern for data center managers?

Options:

A.

Frequency variation helps server performance.

B.

Computer power supplies are frequency tolerant.

C.

Frequency variation is strictly a theoretical problem.

D.

Frequency variation occurs during sag conditions, which the UPS resolves.

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Questions 45

What is an advantage of choosing a four-post open frame rack over a two-post open frame rack?

Options:

A.

Lower cost

B.

Smaller footprint

C.

Easier assembly

D.

Increased strength

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Questions 46

What is the main advantage of using a wider than standard enclosure (over 600 mm)?

Options:

A.

Supports more servers

B.

Provides additional U space

C.

Increases space for network cabling

D.

Improves strength for seismic applications

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Questions 47

What is the purpose of the alternator as a primary component of a standby generator?

Options:

A.

Starts the prime mover upon loss of utility power

B.

Controls output voltage reference produced by the prime mover

C.

Converts mechanical energy from the prime mover into electrical current

D.

Maintains constant RPM of the prime mover under a variety of conditions by adjusting the fuel that feeds the prime mover

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Questions 48

In order to determine the most appropriate UPS configuration for your business, which two factors should be considered? (Choose two.)

Options:

A.

How long recovery from failure will take

B.

How many employees will support the UPS

C.

How much money is budgeted for IT equipment

D.

How much money is flowing through the company every minute

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Exam Code: DU0-001
Exam Name: Data Center University Associate Certification
Last Update: May 1, 2024
Questions: 324
$64  $159.99
$48  $119.99
$40  $99.99
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