FOA CFOT Certification Exam v11 LATEST UPDATED COMPLETE QUESTIONS AND ANSWERS GRADED A+

FOA CFOT Certification Exam v11 LATEST UPDATED COMPLETE QUESTIONS AND ANSWERS GRADED A+ Multimode fiber systems operation at speeds of 1 Gb/s or more use ____________ sources? A- LED B- VCSEL C- F-P Lasers D- DFB Lasers VCSEL The ___________ of a laser makes the effective bandwidth of multimode fiber higher than with LED's. A- Restricted modal launch B- Higher Power C- Lower power D- Bandwidth Restricted modal power Short wavelength 850 nm links can use _________ detectors in the receiver? A- Silicon B- Germanium C- InGaAs Silicon or Germanium Long wavelength single mode links at wavelengths in the range of nm links must use ___________ detectors in the receiver for the best sensitivity performance. A- Silicon B- Germanium C- InGaAs InGaAs Fiber amplifiers and DWDM work in the __________ wavelength range. A- 650-850 B- 850- 1300 C- D- Single mode transceivers use ___________ sources for their higher coupled power and bandwidth. A- LED B- VCSEL C- F-P lasers D- DFB lasers F-P lasers and DFB lasers The protective gear every VDV installer must always wear is _______? A- Eye protection B- Plastic apron C- Gloves D- Shoe covers Eye protection Information on the safety of chemicals used in fiber optics are ______________? A- Available from National Institute of Health B- In MSDS sheets supplied by manufacturers C- Required to be in every installer tool kit D- Rarely used In MSDS sheets supplied by manufacturers Always keep ________ on connectors when not connected to equipment or being tested. A- Mating adapters B- Strain relief boots C- Sticky tape D- Dust caps Dust Caps In an optical fiber, the light is transmitted through the ________? A- Core B- Cladding C- Buffer D- Jacket Core The diameter of an optical fiber is traditionally measured in ________? A- Meters B- Millimeters C- Microns (micrometers) D- Nanometers Microns (micrometers) Rays of light transmitted in multimode fiber are called? A- Reflections B- Refractions C- Waves D- Modes Modes Loss of a fiber or any fiber in a cable is measured in _________? A- dB B- dBm C- milliwatts dB 10 DB corresponds to a factor of _____ in power. A- 2 B- 10 C- 20 D- 100 10 A fiber stripper removes the _______ of the fiber? A- Core B- Cladding C- Buffer coating Buffer coating What are the four levels of the NEC Code? General, Riser, plantenum rated, low smoke What is the real safety issue with fibers being terminated or spliced? Small scraps of glass cleaved off the end of the fiber splice or termination