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APC DU0-001 - Data Center University Associate Certification

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Page: 9 / 10
Total 324 questions

During a power outage, a semi-conductor manufacturing plant is likely to exhibit which cost of downtime profile?

A.

Cost of downtime per hour remains the same.

B.

Cost of downtime per hour increases with time.

C.

Cost of downtime per hour decreases with time.

D.

Cost of downtime per hour is exponential with time.

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

A.

A battery

B.

An inverter

C.

A transfer switch

D.

A single-phase input

What is the primary difference between double conversion and delta conversion UPS systems?

A.

Double conversion UPSs require a 1.3X generator oversizing. Delta conversion UPSs require a 3X generator oversizing.

B.

Double conversion UPSs are practical in size ranges from 0 - 20 kW. Delta conversion UPSs are practical in size ranges of 20 kW to 1 MW.

C.

In a double conversion UPS, 100% of the power is converted from AC to DC and then again from DC to AC. In a delta conversion UPS, only the difference between input and output power is converted.

D.

In a double conversion UPS, the transformer has a special ferro-resonant capability, which provides limited voltage regulation and output waveform shaping. In a delta conversion UPS, a standard transformer is used.

The highest density per rack heat loads should be cooled with which cooling architecture?

A.

Row

B.

Rack

C.

Room

D.

Building

What describes the ratio of watts to volt-amps?

A.

Frequency

B.

Power factor

C.

Actual power

D.

Apparent power

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

A.

Fingerprint

B.

Smart card

C.

Badge with photo

D.

Badge with bar code

E.

Personal identification number

Which is true when designing a power system with factory-configured whips?

A.

The whips require splicing upon installation

B.

There is no need for wiring underneath a raised floor

C.

The power system can run continuously at 140% of its rated capacity

D.

A licensed electrician is required to install the twist lock connectors of the whips

Which statement describes a three-phase power source?

A.

Two voltage sine wave references consisting of two "hot" wires and a ground

B.

One voltage sine wave reference consisting of a "hot" wire, a neutral wire, and a ground

C.

Three voltage sine wave references consisting of one "hot" wire, one neutral wire, and a ground

D.

Three voltage sine wave references consisting of three "hot" wires and accompanying neutral and a ground

MTBF is presented in which form?

A.

Hours

B.

Percent

C.

Distance

D.

Currency

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

A.

EIA-310

B.

UL 1778

C.

CSA C22.2

D.

NEBS GR-63-CORE