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APC DU0-001 Dumps

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Total 325 questions

Data Center University Associate Certification Questions and Answers

Question 1

A network-critical physical infrastructure (NCPI) Management strategy should incorporate what information at the rack level to ensure reliable IT equipment operation? (Choose two.)

Options:

A.

Rack "U" space

B.

Network switches

C.

Individual branch circuits

D.

Rack access to equipment

Question 2

Which statement best describes how a row-oriented cooling architecture optimizes the operational efficiency within the data center?

Options:

A.

Row-oriented architecture allows cooling capacity to be matched to the heat load within each zone.

B.

Row-oriented architecture requires two cooling units per enclosure, creating a desirable oversizing scenario.

C.

Row-oriented architecture cools all rows of the data center while generating additional conditioned air for the adjacent office areas.

D.

Row-oriented architecture requires large volume of air mixing to reduce the return air temperature, driving up cooling system capacity.

Question 3

Which standard was written for the protection of computer or data processing equipment?

Options:

A.

NFPA 71

B.

NFPA 72

C.

NFPA 74

D.

NFPA 75

Question 4

Undervoltage is a more technically accurate term to describe what event?

Options:

A.

Blackout

B.

Brownout

C.

Power drought

D.

Power suppression

Question 5

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

Options:

A.

Glycol

B.

Diesel

C.

Gasoline

D.

Methanol

E.

Natural gas

Question 6

Which management challenge can provide advance warning for failure?

Options:

A.

Change management

B.

Incident management

C.

Capacity management

D.

Availability management

Question 7

What are three benefits of row-oriented cooling architecture? (Choose three.)

Options:

A.

Predictable cooling

B.

Ease of deployment

C.

No raised floor required

D.

Reduced sensible heat ratio

E.

Increased mixing of air streams

Question 8

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

Question 9

What does GFCI mean?

Options:

A.

Ground Fault Circuit Interrupter

B.

General Facilities Cooling Index

C.

Gaussian Filter Charge Indicator

D.

Grounded Flaw Circuitry Installed

Question 10

What is the greatest physical threat to a data center?

Options:

A.

Fire

B.

Dust

C.

Water

D.

People

Question 11

When is frequency variation a more likely occurrence?

Options:

A.

When using new UPS technology

B.

When using older UPS technology

C.

When a generator is heavily loaded

D.

When using three-phase power distribution

Question 12

What are the three stages of combustion? (Choose three.)

Options:

A.

Incipient

B.

Back draft

C.

Thermal flux

D.

Intense heat

E.

Visible smoke

Question 13

When considering data center physical security, which two are examples of "what you know" ? (Choose two.)

Options:

A.

Password typed at a card reader

B.

Numbers punched into a coded lock

C.

The procedure for obtaining a replacement smart card

D.

The sequence of actions for entering and leaving a "man trap"

Question 14

A UPS system consists of three modules in a parallel redundant configuration. Each module is rated to provide 200 kW of power. If the electrical load grows from 350 kW to 420 kW, what will happen?

Options:

A.

The UPS system will not provide any additional power beyond 400 kW.

B.

The UPS system will reach an overload state and switch to its static bypass.

C.

The UPS system's response will vary depending on the rate of electrical load growth.

D.

The UPS system will continue to support the load and become a capacity configuration.

Question 15

Which rack accessory prevents exhaust air from being recirculated and entering equipment intakes?

Options:

A.

Cage nuts

B.

Vented shelves

C.

Blanking panels

D.

Cable managers

Question 16

What is the critical element of a conventional starter motor in a generator?

Options:

A.

Battery

B.

Starter cables

C.

Engine block heater

D.

Automatic charging system

Question 17

The power cable should be marked, at minimum, with which two pieces of information? (Choose two.)

Options:

A.

The source PDU

B.

The date installed

C.

The circuit breaker it is fed from

D.

The voltage capacity of the cable

Question 18

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 19

What are three functions of a data center fire protection system? (Choose three.)

Options:

A.

Detect the presence of a fire

B.

Automatically opens all fire doors

C.

Suppress the fire and limit any damage

D.

Communicate the threat of fire to occupants and authorities

E.

Automatically activate the emergency power off (EPO) button

Question 20

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

Options:

A.

Voice

B.

Fingerprint

C.

Smart cards

D.

Personal identification number

Question 21

What is the purpose of the voltage regulator as a component of a standby generator?

Options:

A.

To control voltage produced at the output of the prime mover

B.

To control the voltage produced at the output of the alternator

C.

To control current flow produced at the output of the alternator

D.

To control voltage produced by the starter to start the prime mover

Question 22

Which fire suppression device uses a solder or glass bulb valve fuse?

Options:

A.

Water sprinkler

B.

Fire extinguisher

C.

Water mist system

D.

Gas flooding system

Question 23

Which statement defines "service entrance"?

Options:

A.

The switchgear delivering AC power to a UPS

B.

The secondary side of a transformer at 208 V or 230 V

C.

The point at which power is distributed from a panel board to a receptacle or local power distribution within an IT enclosure

D.

The point where the responsibility of the electrical power infrastructure shifts from the utility company to the owner or tenants of the building

Question 24

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

Question 25

How is the problem of Electro-Static Discharge(ESD) in the data center solved?

Options:

A.

By installing TVSS devices

B.

By installing RCD breakers in the PDU

C.

By connecting bimetallic strips to all racks

D.

By insulating IT equipment with rubber bushings

Question 26

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)

Question 27

Which substance transfers heat most efficiently?

Options:

A.

Gas

B.

Solid

C.

Liquid

D.

Vapor

Question 28

When monitoring humidity levels in the data center, where is the single most important place to measure the humidity?

Options:

A.

Above the rack

B.

Below the rack

C.

The air intake on IT equipment

D.

The exhaust air coming out of the back of the IT equipment

Question 29

What are three elements of the network-critical physical infrastructure (NCPI)? (Choose three.)

Options:

A.

Racks

B.

Power

C.

Cooling

D.

Storage

E.

Servers

Question 30

Which three access control methods are examples of "what you have"? (Choose three.)

Options:

A.

Fingerprint

B.

Smart card

C.

Badge with photo

D.

Badge with bar code

E.

Personal identification number

Question 31

What are three data center attributes that impact the selection of a fire protection system? (Choose three.)

Options:

A.

The presence of a raised floor

B.

Number of air changes per hour

C.

The rated capacity of the UPS system

D.

The number of double insulated windows

E.

Proximity of the data center to other buildings

Question 32

The outlet of a perimeter CRAC unit is connected to duct work which feeds conditioned air to the aisle above the front of the IT equipment racks. No other air management devices are present in the space.

This is an example of which type of air distribution system?

Options:

A.

Flooded supply, flooded return

B.

Flooded supply, fully ducted return

C.

Flooded supply, locally ducted return

D.

Locally ducted supply, flooded return

Question 33

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

Question 34

What is the difference between reliability and availability?

Options:

A.

MTTR is only factored into reliability.

B.

MTBF is only factored into availability.

C.

Reliability is composed of MTBF and MTTR.

D.

Availability is composed of MTBF and MTTR.

Question 35

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.

Question 36

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 37

Which management strategy is concerned with returning to the normal service levels as defined in a negotiated service level agreement (SLA)?

Options:

A.

Incident management

B.

Change management

C.

Capacity management

D.

Availability management

Question 38

Which two concepts does "NCPI agility" address? (Choose two.)

Options:

A.

Ability to virtualize

B.

Ability to oversize

C.

Ability to reconfigure

D.

Speed of deployment

Question 39

What is a measure of heat intensity?

Options:

A.

Volume

B.

Humidity

C.

Pressure

D.

Temperature

Question 40

What is the problem with oversizing the UPS system within a data center?

Options:

A.

It limits the growth capacity of the data center.

B.

It decreases the mean time to recover (MTTR).

C.

It increases the number of single points of failure.

D.

It drives excessive capital and maintenance expenses.

Question 41

Which cooling architecture attempts to eliminate hot spots within the data center by utilizing large volumes of air mixing throughout the space?

Options:

A.

Row

B.

Rack

C.

Room

D.

Ceiling

Question 42

In which three locations are smoke detectors commonly placed in the data center? (Choose three.)

Options:

A.

On ceilings

B.

Below raised floors

C.

In cable trays

D.

Above drop down ceilings

E.

Inside the power distribution unit

Question 43

Which temperature range is optimal for the proper function of a data center?

Options:

A.

62-65F (17-18C)

B.

72-75F (22-24C)

C.

82-85F (28-29C)

D.

92-95F (33-35C)

Question 44

Click the Exhibit button.

This picture illustrates which type of cooling architecture?

Options:

A.

Hybrid

B.

Row

C.

Rack

D.

Room

Question 45

Which NCPI management technique specifically addresses the challenge of maintaining spare equipment at compatible firmware revision levels to avoid downtime?

Options:

A.

Change management

B.

Capacity management

C.

Reliability management

D.

Availability management

Question 46

Consider a data center installation where circuit panels are installed at the end of each row of IT racks. Conduit is then run from power distribution units (PDUs) to the circuit panels and then to a subset of connections to the racks.

What are the two primary advantages to this power cabling approach? (Choose two.)

Options:

A.

It improves electrical efficiency.

B.

Shorter electrical conduit makes it easier to manage.

C.

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

D.

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

Question 47

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

Question 48

Which three key components make up a three-phase stationary power distribution unit? (Choose three.)

Options:

A.

Rectifier

B.

Panel board

C.

Input transformer

D.

Rack mount bracket

E.

Input circuit breaker

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Total 325 questions