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DU0-001 Data Center University Associate Certification Questions and Answers

Questions 4

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)

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Questions 5

In order to determine the exact level of redundancy available in the cooling system, which cooling architecture would require CFD analyses of every combination of system failures within the data center?

Options:

A.

Row

B.

Rack

C.

Room

D.

Ceiling

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Questions 6

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

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Questions 7

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

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Questions 8

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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Questions 9

What are two advantages of the line interactive UPS? (Choose two.)

Options:

A.

High reliability

B.

High efficiency

C.

High frequency control

D.

Optimized for 10 kW and above

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Questions 10

What are two common UPS topologies? (Choose two.)

Options:

A.

Standby

B.

Delta interactive

C.

Standard interactive

D.

Double conversion on-line

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Questions 11

Which two criteria make bar code cards a good choice? (Choose two.)

Options:

A.

Low budget

B.

Low security requirement

C.

High security requirement

D.

Frequently changing access privileges

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Questions 12

Which three factors should be considered when evaluating physical security systems? (Choose

three.)

Options:

A.

VESD protocols

B.

User friendliness

C.

Cost of equipment

D.

Color of security hardware components

E.

Likelihood of locking out legitimate users

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Questions 13

Which two UPS topologies are used for UPS systems that supply at least 50 kW? (Choose two.)

Options:

A.

Standby

B.

Standby - ferro

C.

Delta conversion online

D.

Double conversion online

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Questions 14

What percentage of electricity used to power IT equipment is typically converted into heat?

Options:

A.

85%

B.

90%

C.

95%

D.

99%

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Questions 15

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

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Questions 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

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Questions 17

Which method transfers heat through a solid material?

Options:

A.

Radiation

B.

Convection

C.

Conduction

D.

Evaporation

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Questions 18

What is a measure of heat intensity?

Options:

A.

Volume

B.

Humidity

C.

Pressure

D.

Temperature

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Questions 19

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"

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Questions 20

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 21

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.

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Questions 22

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 23

A coded lock is an example of which general type of access control?

Options:

A.

Who you are

B.

Where you are

C.

What you have

D.

What you know

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Questions 24

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 25

Which statement is true about humidity?

Options:

A.

If the relative humidity is zero, there is no water vapor present.

B.

As the air temperature decreases, its ability to hold water increases.

C.

If the relative humidity is 50%, the air is holding all the water vapor it can.

D.

The amount of water that can be contained in the room air is fixed regardless of the room temperature.

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Questions 26

Click the Exhibit button.

DU0-001 Question 26

Which type of power problem is shown in the exhibit?

Options:

A.

DC offset

B.

Interruption

C.

Undervoltage

D.

Harmonic distortion

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Questions 27

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 28

Which fire class consists of fires of ordinary combustible materials such as paper, wood, cloth, and some plastics?

Options:

A.

Class A

B.

Class B

C.

Class C

D.

Class D

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Questions 29

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

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Questions 30

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 31

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

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Questions 32

Which method transfers heat by electromagnetic waves?

Options:

A.

Radiation

B.

Convection

C.

Conduction

D.

Evaporation

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Questions 33

Which two are characteristics of an agile data center? (Choose two.)

Options:

A.

Provision a UPS module with a different power capacity.

B.

Change out plug types when new IT equipment is installed.

C.

Design for "worse case" capacity to prevent future downtime.

D.

Have N+1 redundancy in part of the data center and 2N in another part based on equipment criticality.

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Questions 34

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.

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Questions 35

How does the parallel redundant UPS configuration differ from an isolated redundant UPS configuration?

Options:

A.

A parallel redundant configuration is considered N+1 and an isolated redundant configuration is considered 2N.

B.

A parallel redundant configuration requires a static bypass switch and an isolated redundant configuration does not.

C.

A parallel redundant configuration eliminates downstream single points of failure and an isolated redundant configuration does not.

D.

A parallel redundant configuration requires models of the same capacity from the same manufacturer and isolated redundant does not.

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Questions 36

Which is an example of an NCPI management system data point?

Options:

A.

Monitoring of network traffic

B.

Mislabeling of kirk-key interlock

C.

Advanced warning of UPS battery deficiency

D.

Reading of boiler room steam pressure levels

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Questions 37

According to the Ideal Gas Law, what happens to the pressure when the temperature is increased and the volume is held constant?

Options:

A.

The pressure does not change.

B.

The pressure initially increases and then decreases.

C.

The pressure increases.

D.

The pressure decreases.

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Questions 38

What does NFPA mean?

Options:

A.

National Fire Prevention Agency

B.

National Flammable Protection Act

C.

National Fire Protection Association

D.

National Firefighter & Paramedic Alliance

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Questions 39

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

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Questions 40

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

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Questions 41

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 42

Which two statements are true of fiber cabling versus copper? (Choose two.)

Options:

A.

Fiber cable provides faster connection speeds.

B.

Fiber cable is not prone to electrical interference.

C.

Fiber cable is generally less expensive for shorter distances.

D.

Fiber cables are thicker than copper cables, but they weigh less.

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Questions 43

Which UPS topology switches to batteries and turns on the inverter when the utility fails?

Options:

A.

Rotary

B.

Standby

C.

Delta conversion

D.

Double conversion

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Questions 44

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.

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Questions 45

Standby generators typically use which type of engine?

Options:

A.

Rotary

B.

Turbine

C.

Two-stroke

D.

Four-stroke

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Questions 46

A power line conditioner can compensate for which two events?

Options:

A.

DC offset

B.

Interruptions

C.

Current increases

D.

Voltage fluctuations

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Questions 47

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 48

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

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Exam Code: DU0-001
Exam Name: Data Center University Associate Certification
Last Update: Sep 14, 2024
Questions: 324

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