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APC DU0-001 - Data Center University Associate Certification

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Total 324 questions

What is the purpose of the governor as a primary component of a standby generator?

A.

Regulates output voltage and frequency

B.

Maintains constant RPM of the prime mover

C.

Converts mechanical energy from the prime mover into alternating current

D.

Receives a signal from the automatic transfer switch to initiate the start of the prime mover

What is a fundamental purpose of a step-up or step-down transformer?

A.

Supply a neutral reference on the secondary side that is different than what is supplied on the primary side.

B.

Supply a ground reference on the secondary side that is different than what is supplied to the primary side.

C.

Deliver a voltage reference on the secondary side of the transformer different than what is supplied to the primary side.

D.

Deliver the same voltage reference on the secondary side of the transformer equal to that supplied on the primary side.

Which of the following is an example of equipment that would be monitored by a building management system (BMS) ?

A.

A network router

B.

A telephone switch

C.

A data center server

D.

A comfort-air conditioning system

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

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

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

Which method of heat transfer occurs when stepping barefoot onto hot pavement?

A.

Radiation

B.

Convection

C.

Conduction

D.

Evaporation

How do non-insulated water pipes impact humidity in the data center?

A.

They can increase the humidity in the data center.

B.

They can decrease the humidity in the data center.

C.

They do not affect the overall humidity of the data center.

D.

The affect they have on humidity depends on whether the pipes are copper or steel.

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?

A.

Flooded supply, flooded return

B.

Flooded supply, fully ducted return

C.

Flooded supply, locally ducted return

D.

Locally ducted supply, flooded return

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

A.

62-65F (17-18C)

B.

72-75F (22-24C)

C.

82-85F (28-29C)

D.

92-95F (33-35C)

Why are dry chemical fire extinguishers a poor practice for data center fire protection?

A.

They set off smoke alarms.

B.

They are corrosive to IT equipment.

C.

They cause condensation on equipment.

D.

They are ineffective against electrical fires.