APC APC Certifications DU0-001 Questions & Answers

• Question 241:

  Which statement describes the system + system redundant configuration?

  A. Identical UPS systems are required.

  B. It is the most expensive configuration.

  C. Only single corded loads can be supported.

  D. Design capacities are much smaller than other configurations.

  Correct Answer: B

• Question 242:

  What allows you to support single-corded loads in a 2N UPS redundant configuration?

  A. DC disconnect

  B. Transfer switch

  C. Static bypass switch

  D. Wrap around external bypass

  Correct Answer: B

• Question 243:

  What are two advantages that the isolated redundant configuration has over a capacity configuration? (Choose two.)

  A. The isolated redundant configuration has a lower operating cost than a capacity design.

  B. The isolated redundant configuration provides redundancy but the capacity configuration does not.

  C. The isolated redundant configuration can scale to larger capacities than the capacity configuration.

  D. The isolated redundant configuration allows multiple vendor UPSs. The capacity configuration must use the same UPS manufacturers.

  Correct Answer: BD

• Question 244:

  What is the problem with oversizing the UPS system within a data center?

  A. It limits the growth capacity of the data center.

  B. It decreases the mean time to recover (MTTR).

  C. It increases the number of single points of failure.

  D. It drives excessive capital and maintenance expenses.

  Correct Answer: D

• Question 245:

  Given an electrical load of 300 kW, which three UPS systems would represent an "N" configuration?

  (Choose three.)

  A. 1 UPS capable of supplying 400 kW

  B. 2 UPSs paralleled; each UPS capable of 200 kW

  C. 3 UPSs paralleled; each UPS capable of 150 kW

  D. 4 UPSs paralleled; each UPS capable of 75 kW

  E. 5 UPSs paralleled; each UPS capable of 100 kW

  Correct Answer: ABD

• Question 246:

  Which NCPI component protects the data center during long duration outages (several hours to days)?

  A. Generator

  B. Static UPS

  C. Flywheel UPS

  D. Automatic transfer switch

  Correct Answer: C

• Question 247:

  What aspect of standby power generation is highly regulated by governmental bodies?

  A. Emissions

  B. Physical size

  C. Output voltage

  D. Fuel consumption

  Correct Answer: A

• Question 248:

  Click the Exhibit.

  

  In the exhibit, which component is represented by the box with the arrow?

  A. Alternator

  B. Switchgear

  C. Sub feed panel

  D. Automatic transfer switch

  Correct Answer: D

• Question 249:

  Which three critical functions does grounding serve for a standby generator? (Choose three.)

  A. Prevents harmonics from affecting the IT load

  B. Provides a low-impedance electrical return path

  C. Prevents electrical shock during maintenance and/or repair

  D. Serves as a reference signal to the automatic transfer switch

  E. Ensures circuit breakers trip before electrical malfunctions develop into fires

  Correct Answer: BCE

• Question 250:

  Which three preventative maintenance activities are required to ensure reliability of a standby generator and automatic transfer switch? (Choose three.)

  A. Take coolant samples.

  B. Perform a thermal scan.

  C. Perform a diagnostic on the rectifier.

  D. Perform an inverter voltage regulation check.

  E. Perform a trip setting check of all major circuit breakers.

  Correct Answer: ABE