RCDD Optical Fiber Systems and Testing 2

Question 1

What is the minimum bend radius for a single-mode optical fiber cable (non-armored, single tube) during installation?

Accepted Answer

20 times the cable outer diameter

Answer

10 times the cable outer diameter

Answer

4 times the cable outer diameter

Answer

50 times the cable outer diameter

Question 2

Which connector type is the standard for single-mode fiber in premises telecommunications per ANSI/TIA-568?

Accepted Answer

LC duplex

Answer

ST

Answer

SC duplex

Answer

FC/APC

Question 3

What is the key difference between an APC (Angled Physical Contact) and UPC (Ultra Physical Contact) fiber connector?

Accepted Answer

APC has an 8-degree angled polish that reduces back-reflection; UPC has a flat polish with higher back-reflection

Answer

APC supports multimode only; UPC supports single-mode only

Answer

APC uses a green housing; UPC uses a blue housing for easy identification only

Answer

UPC provides lower insertion loss; APC provides lower return loss

Question 4

In a fiber optic link loss budget calculation, which components must be included?

Accepted Answer

Connector losses, splice losses, fiber attenuation, and a safety margin

Answer

Only fiber attenuation over the link length

Answer

Connector losses and fiber attenuation only

Answer

Splice losses and a safety margin only

Question 5

What wavelength is primarily used for short-wavelength (SX) multimode fiber optic transceivers in data centers?

Accepted Answer

850 nm

Answer

1310 nm

Answer

1550 nm

Answer

1625 nm

Question 6

What is the primary advantage of using pre-terminated fiber cassettes (MPO/MTP) over field-terminated fiber in a data center?

Accepted Answer

Factory-terminated cassettes offer consistent quality, faster installation, and easier cable management

Answer

Pre-terminated cassettes support longer link distances than field-terminated fiber

Answer

Cassettes eliminate the need for OTDRs during acceptance testing

Answer

Pre-terminated systems are required by ANSI/TIA-568 for all data centers