OSP Fiber Optic & Copper Cabling Systems 3

Question 1

A fiber optic cable rated as 'OFNR' can be installed in which of the following locations?

Accepted Answer

Riser shafts between floors

Answer

OFNR (Optical Fiber Non-conductive Riser) is rated for vertical runs in riser shafts where fire spread between floors is the primary concern.

Question 2

When calculating copper cable resistance for OSP loop design, which factor has the GREATEST effect on loop resistance?

Accepted Answer

Conductor gauge (AWG)

Answer

Conductor gauge (AWG) is the dominant factor; smaller AWG numbers indicate larger wire diameters with lower resistance per unit length.

Question 3

In wavelength-division multiplexing (WDM) fiber systems, what does 'channel spacing' refer to?

Accepted Answer

Frequency or wavelength separation between adjacent optical carriers

Answer

Channel spacing defines the frequency (in GHz) or wavelength (in nm) separation between WDM channels to prevent inter-channel interference.

Question 4

What is the purpose of an 'optical time-domain reflectometer' (OTDR) launch cable?

Accepted Answer

To eliminate the dead zone at the beginning of a trace near the OTDR port

Answer

A launch cable (typically 100-500 m) moves the OTDR's near-end dead zone away from the fiber under test, allowing the first splice or connector to be accurately measured.

Question 5

Which copper cable test parameter measures the ability of a cable to reject unwanted signals from external electromagnetic sources?

Accepted Answer

Transfer impedance (shield effectiveness)

Answer

Transfer impedance (or shield effectiveness) quantifies how well a cable's shield prevents external EMI from coupling onto the signal conductors.

(OSP) Outside Plant Designer Practice Test

(OSP) Outside Plant Designer Practice Test

OSP Fiber Optic & Copper Cabling Systems 3