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Questions # 31:

Which NCPI change management challenge is faced when optimizing business agility?

Options:
A.

Maximizing the ratio of rack efficiency to cost over runs.

B.

Maximizing the ratio of the UPS to batteries needed for uptime.

C.

Maximizing the ratio of planned to unplanned work in a data center.

D.

Maximizing the ratio of leak detection to computer room air conditioners.

Questions # 32:

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

Options:
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.

Questions # 33:

What is one cause of oscillatory transients?

Options:
A.

Lightning strikes

B.

Non-unity power factors

C.

Motors turning on and off

D.

Static electricity discharges

Questions # 34:

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

Options:
A.

Thermal

B.

Magnetic

C.

Fast-acting

D.

Photovoltaic

Questions # 35:

Which type of application typically utilizes an enclosure wider than 600 mm?

Options:
A.

Network cabling

B.

Storage disk arrays

C.

Rack-mounted UPS

D.

Shelf-mounted tower servers

Questions # 36:

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

Options:
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.

Questions # 37:

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

Questions # 38:

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

Options:
A.

Supports more servers

B.

Provides additional U space

C.

Increases space for network cabling

D.

Improves strength for seismic applications

Questions # 39:

What is the most common direction of airflow through a rack mount blade server assembly?

Options:
A.

Side to side

B.

Front to back

C.

Back to front

D.

Bottom to top

Questions # 40:

What is a measure of heat intensity?

Options:
A.

Volume

B.

Humidity

C.

Pressure

D.

Temperature

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