CTE Power Systems & Grounding 2

Question 1

What is the primary function of a rectifier in a telecommunications DC power system?

Accepted Answer

To convert AC utility power to DC power for telecommunications equipment and battery charging

Answer

To convert DC battery power to AC power during outages

Answer

To regulate battery discharge rates during power failures

Answer

To distribute DC power evenly across multiple equipment racks

Question 2

What does VRLA stand for in telecommunications battery technology?

Accepted Answer

Valve-Regulated Lead Acid

Answer

Variable Resistance Lead Acid

Answer

Ventilated Regulated Lead Acid

Answer

Variable Rate Lead Accumulator

Question 3

What is the typical float voltage per cell for a valve-regulated lead-acid (VRLA) battery in a telecom application?

Accepted Answer

2.23V

Answer

1.80V

Answer

2.00V

Answer

2.50V

Question 4

What is the purpose of an Automatic Transfer Switch (ATS) in a telecommunications facility?

Accepted Answer

To automatically switch between primary and alternate power sources when the primary source fails

Answer

To regulate output voltage from an on-site generator

Answer

To balance electrical loads across multiple branch circuits

Answer

To convert AC power to DC for battery charging

Question 5

Which standard defines environmental and power requirements for equipment installed in telecommunications central offices?

Accepted Answer

GR-63-CORE (NEBS Level 3)

Answer

ANSI/TIA-568-D

Answer

IEEE 802.3bt

Answer

NFPA 70 Article 800

Question 6

What is the primary purpose of a Power Distribution Unit (PDU) in a telecommunications equipment room?

Accepted Answer

To distribute electrical power from a central source to individual telecommunications equipment racks and devices

Answer

To generate emergency backup power when utility power fails

Answer

To convert DC battery power to AC power for sensitive equipment

Answer

To monitor network traffic and correlate it with power consumption data

Question 7

At what discharge rate are telecom battery strings typically rated for capacity?

Accepted Answer

C/8 (8-hour rate)

Answer

C/1 (1-hour rate)

Answer

C/4 (4-hour rate)

Answer

C/20 (20-hour rate)