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APC DU0-001 Data Center University Associate Certification Exam Practice Test

Demo: 48 questions
Total 325 questions

Data Center University Associate Certification Questions and Answers

Question 1

Which capacity management technique addresses power, rack space, cooling, and cabling needs?

Options:

A.

Tracking server and infrastructure performance in high heat areas

B.

Maintaining status quo of the data center infrastructure

C.

Building the data center infrastructure with a raised floor environment

D.

Optimizing physical infrastructure layout of existing and new equipment

Question 2

In network data cabling, what is currently the medium of choice for short cable runs?

Options:

A.

Arcnet

B.

Copper

C.

Ethernet

D.

Twisted pair

Question 3

What is the definition of reliability?

Options:

A.

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

B.

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

C.

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

D.

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

Question 4

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

Options:

A.

Each cooling unit works to cool the load through a raised floor plenum.

B.

Each cooling unit is ceiling mounted and targets cool air to the cold aisles.

C.

Each cooling unit works directly to cool the heat load of a specific equipment rack.

D.

Each cooling unit is placed along the data center wall and cools the general air space.

Question 5

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

Question 6

What is the function of a circuit breaker?

Options:

A.

To distribute power from the UPS to critical loads

B.

To filter harmonics caused by non-power factor corrected computer loads

C.

To protect electrical equipment from damage caused by overload or short circuit

D.

To balance the loads in the data center to prevent stray currents on the ground wire

Question 7

What is a primary impact of high humidity in the data center?

Options:

A.

It corrupts data on disk drives.

B.

It triggers short circuits in power distribution units.

C.

It creates airborne health hazards in the data center.

D.

It corrodes internal computer components over time.

Question 8

Which UPS topology uses a transfer switch between the primary power source and the inverter?

Options:

A.

Standby

B.

High speed relay

C.

Delta conversion online

D.

Double conversion online

Question 9

For reliable generator operation, what are two critical elements of the prime mover? (Choose two.)

Options:

A.

Air filter

B.

Fuel filter

C.

Noise filter

D.

Harmonic filter

Question 10

Which benefit is provided when air distribution methods return the warmest air to the CRAC units?

Options:

A.

Decreased heat load in the data center

B.

Increased capacity of the cooling system

C.

Maximized mixing of supply and return air

D.

Elimination of resistance created by underfloor cables

Question 11

Click the Exhibit button.

What type of power problem does the exhibit illustrate?

Options:

A.

Harmonics

B.

Overvoltage

C.

Overcurrent

D.

Impulsive transient

Question 12

Chilled water produced by a chiller is typically within which temperature range?

Options:

A.

34 - 38 F (1 - 3 C)

B.

44 - 48 F (6 - 9 C)

C.

56 - 60 F (13 - 16 C)

D.

70 - 74 F (21 - 23 C)

Question 13

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

Question 14

What is the primary feature of a smart card?

Options:

A.

A picture

B.

A bar code

C.

A silicon chip

D.

An expiration date

Question 15

What is the load per rack where the room cooling architecture starts to become impractical?

Options:

A.

1 kW

B.

3 kW

C.

7 kW

D.

10 kW

Question 16

Which two characteristics do all static UPS topologies share? (Choose two.)

Options:

A.

A battery

B.

An inverter

C.

A transfer switch

D.

A single-phase input

Question 17

Physical security can be increased by which three activities? (Choose three.)

Options:

A.

Adding more IT personnel

B.

Adding live security guards

C.

Changing from smart cards to bar code badges

D.

Adding concentric security zones to increase "depth of security"

E.

Adding password or fingerprint verification at a card-reading checkpoint

Question 18

What is an advantage of ceiling mount systems?

Options:

A.

They plug into wall outlets

B.

They provide the highest capacity units

C.

They rapidly redeploy to a different location

D.

They do not take away from IT equipment space

Question 19

Your data center has a 75 kW load and is located in a building that would require long distances between the indoor and outdoor cooling units. There is no cooling tower available and reducing capital cost is a priority.

Which heat rejection method should be used?

Options:

A.

Chilled water system

B.

Water cooled system

C.

Glycol cooled system

D.

Air cooled split system

Question 20

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.

Question 21

What is required for the transfer of heat from one object to another?

Options:

A.

A difference in airflow

B.

A difference in volume

C.

A difference in pressure

D.

A difference in temperature

Question 22

Which two ways does a transient voltage surge suppressor (TVSS) work? (Choose two.)

Options:

A.

Absorbs transient energy

B.

Short circuits the energy to ground

C.

Closes the circuit and stops the energy flow

D.

Compensates for the voltage change with battery power

Question 23

Which two would be used for biometric access control? (Choose two.)

Options:

A.

Voice

B.

Fingerprint

C.

Smart cards

D.

Personal identification number

Question 24

Which represents the highest expense when pricing out a cabling solution?

Options:

A.

Delivery cost

B.

Installation cost

C.

Inventory and storage cost

D.

Patch cable maintenance cost

Question 25

Click the Exhibit button.

What does the exhibit represent?

Options:

A.

UPS control panel

B.

Pneumatic door opener

C.

Emergency power off (EPO) button

D.

Fire suppression de-activation (FSD) button

Question 26

A previously built data center inherited the existing wet pipe sprinkler system. There are smoke detectors in the data center and the local authority having code jurisdiction mandates a sprinkler system in the data center.

How can you further protect the data center's IT equipment while meeting the mandated requirements?

Options:

A.

Replace the wet-pipe sprinkler system with a FM-200 system.

B.

Replace the wet-pipe sprinkler system with a pre-action system.

C.

Install linear heat detectors along the cable trays in addition to the existing sprinkler system.

D.

Install heat detectors next to each of the sprinkler heads and then connect them to the fire control panel.

Question 27

What is an example of a standard building management system (BMS) protocol?

Options:

A.

IPV6

B.

TCP/IP

C.

MODBUS

D.

10/100 BASE-T

Question 28

What is the difference between an undervoltage and a sag?

Options:

A.

A sag lasts less time than an undervoltage condition.

B.

A sag has less of a voltage drop than an undervoltage condition.

C.

A sag is due to downstream loads and undervoltage is due to the power source.

D.

A sag occurs in low voltage distribution and undervoltage occurs in high voltage distribution.

Question 29

What is the worldwide recognized standard for equipment mounting spacing for 482.6 mm (19 inch) equipment?

Options:

A.

EIA-310

B.

UL 1778

C.

CSA C22.2

D.

NEBS GR-63-CORE

Question 30

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.

Question 31

What represents the optimum scenario for investing in network-critical physical infrastructure (NCPI) technologies?

Options:

A.

NCPI cost is low and the risk/cost of downtime is high.

B.

NCPI cost is high and the risk/cost of downtime is low.

C.

The projected cost of downtime has not yet been established.

D.

Oversize the initial NCPI investment to minimize the possibility of downtime.

Question 32

What defines a delta to wye transformer?

Options:

A.

Takes in three-phases and ground; outputs three-phases and ground

B.

Takes in three-phases, neutral, and ground; outputs three-phases and ground

C.

Takes in three-phases and ground; outputs three-phases, neutral, and ground

D.

Takes in three-phases, neutral, and ground; outputs three-phases, neutral, and ground

Question 33

What are three characteristics of a water mist suppression system? (Choose three.)

Options:

A.

Requires manual activation

B.

Uses minimal storage space

C.

Discharges very fine water droplets

D.

Is popular in industrial environments

E.

Extinguishes fire by absorbing oxygen

Question 34

What does the term "5-nines" availability mean?

Options:

A.

5 minutes of downtime per year

B.

9 minutes of downtime per year

C.

14 minutes of downtime per year

D.

45 minutes of downtime per year

Question 35

What is a disadvantage of air cooled self-contained systems?

Options:

A.

Higher capital costs for smaller installations

B.

Requires refrigerant piping to be installed in the field

C.

Often requires installation of duct work or dropped ceiling

D.

Introduces an additional source of liquid to the data center

Question 36

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

Question 37

What is an advantage of hot aisle/cold aisle rack configuration?

Options:

A.

It prevents hot exhaust air from leaving the cold aisle.

B.

It prevents cold air from being drawn into the IT equipment intakes.

C.

It prevents exhaust air of one rack from being in the intake.

D.

It prevents hot exhaust air from reaching the computer room cooling units.

Question 38

Which method of physical security offers superior protection?

Options:

A.

Smart card

B.

Biometric scan

C.

Video surveillance

D.

Combination of methods

Question 39

Which statement correctly defines direct current (DC)?

Options:

A.

Only high voltage is used.

B.

Electricity flows in one direction only.

C.

The circuit does not have multiple paths.

D.

The circuit is directly attached to the power source.

Question 40

When constructing a new data center, what is a best practice for controlling the influence of outside humidity?

Options:

A.

Use water-based paints for the walls.

B.

Install vapor barriers in walls and around doors.

C.

Increase the number of doors leading out of the data center.

D.

Use 2 foot by 6 foot ( .61 meters by 1.83 meters) steel framing for the walls, floors, and ceilings.

Question 41

Which risk is minimized when data center managers deploy network-critical physical infrastructure (NCPI) solutions?

Options:

A.

Downtime caused by power interruptions.

B.

Downtime caused by high speed storage.

C.

Downtime caused by poorly trained computer operators.

D.

Downtime caused by improper operational process documentation.

Question 42

Which access control method is an example of "who you are"? (Choose three.)

Options:

A.

Iris scan

B.

Fingerprint

C.

Voice recognition

D.

Badge with photo

E.

Employee ID number

Question 43

Which describes an intelligent spot type smoke detector?

Options:

A.

Changes the tone of the alarm depending on the heat intensity of a fire

B.

Allows location-specific information to be sent to the central control station

C.

Regulates the amount of air entering the sensor chamber to minimize false alarms

D.

Uses wireless technology similar to RFID which requires fewer detectors per unit area

Question 44

Which is the most common high speed data network found in data centers?

Options:

A.

FDDI

B.

Arcnet

C.

Ethernet

D.

Token ring

Question 45

Which statement describes the system + system redundant configuration?

Options:

A.

Identical UPS systems are required.

B.

It is the most expensive configuration.

C.

Only single corded loads can be supported.

D.

Design capacities are much smaller than other configurations.

Question 46

Which UPS configuration has the highest availability?

Options:

A.

Capacity

B.

Parallel redundant

C.

Isolated redundant

D.

Distributed redundant

Question 47

Click the Exhibit button.

This picture illustrates which type of cooling architecture?

Options:

A.

Rack

B.

Row

C.

Room

D.

Building

Question 48

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.

Demo: 48 questions
Total 325 questions