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  • Exam Name: Data Center University Associate Certification
  • Last Update: Apr 29, 2024
  • Questions and Answers: 325
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DU0-001 Practice Exam Questions with Answers Data Center University Associate Certification

Question # 6

When developing a management strategy, how long do organizations typically focus on fully implementing each management process before moving on to the next?

A.

One to three months

B.

Three to six months

C.

Six to nine months

D.

Nine to twelve months

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Question # 7

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

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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Question # 8

Which describes an intelligent spot type smoke detector?

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

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Question # 9

What is the unit of measurement of the electrical current moving through a circuit?

A.

Volt

B.

Amp

C.

Ohm

D.

Frequency

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Question # 10

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

A.

Lower cost

B.

Smaller footprint

C.

Easier assembly

D.

Increased strength

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Question # 11

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

A.

Iris scan

B.

Fingerprint

C.

Voice recognition

D.

Badge with photo

E.

Employee ID number

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Question # 12

What is the largest cause of downtime in data centers?

A.

Sabotage

B.

Human error

C.

Natural disasters

D.

Equipment failure

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Question # 13

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?

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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Question # 14

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

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

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Question # 15

Which method transfers heat through the movement of a liquid or gas?

A.

Radiation

B.

Convection

C.

Conduction

D.

Evaporation

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Question # 16

What is the definition of a cable assembly?

A.

A set of cables twisted together

B.

A cable with a connector terminated onto both ends

C.

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

D.

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

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Question # 17

What characteristic is common to all cooling architectures?

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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Question # 18

What is defined as the force of electricity moving through a circuit?

A.

Volt

B.

Amp

C.

Ohm

D.

Frequency

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Question # 19

Which statement describes a key characteristic of humidity?

A.

Air temperature does not affect air water vapor content.

B.

As temperature increases, the air can hold more water vapor.

C.

As the temperature increases, the air can hold less water vapor.

D.

As the temperature decreases, the air can hold more water vapor.

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Question # 20

What are the two features of enclosures that optimize adaptability when reconfiguring room layouts?

A.

Fan trays

B.

Perforated doors

C.

Field-reversible doors

D.

Quick-release side panels

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Question # 21

A data center manager wants to purchase a reliable UPS and specifies an MTBF of one million hours.

What are two reasons this specification is flawed? (Choose two.)

A.

Assumptions are not stated.

B.

No definition of failure is provided.

C.

Manufacturers do not provide MTBF.

D.

MTBF is not a measure of reliability.

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Question # 22

How long is the transfer to battery time for a double conversion online UPS?

A.

0 ms (0 cycles)

B.

8 ms (0.5 cycles)

C.

16 ms (1 cycle)

D.

500 ms (30 cycles)

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Question # 23

What is a difference between Single-phase and three-phase power?

A.

Single-phase power is flat but three-phase power is sinusoidal.

B.

Single-phase power is dependent on power factor but three-phase power is not.

C.

Single-phase power is limited to approximately 120 kW but three-phase power is unlimited.

D.

Single-phase power is more costly for the power company to distribute than three-phase power.

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Question # 24

When is frequency variation a more likely occurrence?

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

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Question # 25

What is most critical for an aircraft that is in flight?

A.

Reliability

B.

Availability

C.

Manageability

D.

Maintainability

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Question # 26

What are two circuit breaker types found in a building or data center? (Choose two.)

A.

Thermal

B.

Magnetic

C.

Fast-acting

D.

Photovoltaic

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Question # 27

How many amps is a NEMA 5-30R receptacle rated to support?

A.

5 amps

B.

15 amps

C.

20 amps

D.

30 amps

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Question # 28

What are three advantages of biometric access control? (Choose three.)

A.

Cannot be lost

B.

Inexpensive to deploy

C.

Difficult to fool the sensor

D.

Cannot be shared with others

E.

Always correctly identifies the user

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Question # 29

Click the Exhibit button.

DU0-001 question answer

This picture illustrates which type of cooling architecture?

A.

Hybrid

B.

Row-oriented

C.

Rack-oriented

D.

Room-oriented

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Question # 30

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

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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Question # 31

Which two should be used as a basis for determining the UPS redundancy configuration? (Choose two.)

A.

Voltage level

B.

Cost of downtime

C.

Availability requirements

D.

Size of the electrical load

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Question # 32

Which three statements describe a circuit breaker? (Choose three.)

A.

It regulates voltage.

B.

It is a type of switch.

C.

It serves as a best source selector.

D.

It comes in a wide range of voltages and amps.

E.

It is designed to protect electrical equipment from damage caused by overload or short circuit.

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Question # 33

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

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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Question # 34

What does GFCI mean?

A.

Ground Fault Circuit Interrupter

B.

General Facilities Cooling Index

C.

Gaussian Filter Charge Indicator

D.

Grounded Flaw Circuitry Installed

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Question # 35

Which type of multimode fiber is commonly used to support longer runs of 10 Gigabit Ethernet?

A.

9/125 rapid grade

B.

62.5/125 FDDI grade

C.

50/125 laser optimized

D.

25/125 AWG optimized

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Question # 36

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

A.

Blackout

B.

Brownout

C.

Power drought

D.

Power suppression

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Question # 37

What describes the ratio of watts to volt-amps?

A.

Frequency

B.

Power factor

C.

Actual power

D.

Apparent power

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Question # 38

What does the CFD acronym stand for?

A.

Certified Field Dichotomy

B.

Circular Flow Determination

C.

Computational Finite Deviation

D.

Computational Fluid Dynamics

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Question # 39

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.)

A.

Acoustic foam

B.

Trash receptacle

C.

Plenum rated cables

D.

Recessed sprinkler heads

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Question # 40

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

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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Question # 41

What are three components of power distribution? (Choose three.)

A.

Flexible conduit

B.

Circuit / branch circuit

C.

Automatic Transfer Switch (ATS)

D.

Uninterruptible Power Supply (UPS)

E.

Ground Loop

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Question # 42

To formulate proper cooling patterns in data centers, how should racks be arranged?

A.

Alternating hot and cold aisles

B.

Organizing individual rows by application

C.

Placing hot spots in the corners of the room

D.

Segmenting hot aisles in one room and cold aisles in another

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Question # 43

Click the Exhibit button.

DU0-001 question answer

This picture illustrates which type of cooling architecture?

A.

Rack

B.

Row

C.

Room

D.

Building

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Question # 44

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

A.

Inergen

B.

FE-130

C.

FM-200

D.

Halon 1211

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Question # 45

An infrared scan of cabling can detect what two problems? (Choose two.)

A.

An overloaded circuit

B.

A loose connection

C.

Compatibility errors

D.

Electrical interference

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Question # 46

Which statement describes the term "saturation point"?

A.

When air reaches 100% relative humidity

B.

When air temperature exceeds 80 F (27C)

C.

When water appears on the data center floor

D.

When the air's dew point is twice the temperature

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Question # 47

Which two would cause a swell? (Choose two.)

A.

Ground fault interrupt

B.

Sudden load reductions

C.

Single-phase fault in a three-phase system

D.

Automatic transfer switch (ATS) transfer to secondary power

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Question # 48

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

A.

Voice

B.

Fingerprint

C.

Smart cards

D.

Personal identification number

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