CFOS/T EXAM QUESTIONS AND ANSWERS
100% SOLVED (Newest 2025)
Which connectors are acceptable in a fiber optic plant -
Correct Answers ✅FOCIS
What does OLTS stand for? - Correct Answers ✅Optical loss
test set
Fiber optic cable is sometimes tested for what before its
installed? - Correct Answers ✅Continuity
Difference between visual fault locator and tracer? - Correct
Answers ✅Amount of optical power put into the fiber
What can find breaks in fibers too close to be seen by an
OTDR? - Correct Answers ✅Visual Fault Locator
Best way to examine a connector? - Correct Answers ✅At
an angle
What is done before inspecting a connector with a
microscope? - Correct Answers ✅Ensure no power is
present
What would happen if you inspected a connector with
excessively high magnification? - Correct Answers ✅Small
scratches look worse than they actually are
, CFOS/T EXAM QUESTIONS AND ANSWERS
100% SOLVED (Newest 2025)
Where are scratches or defects a problem? - Correct
Answers ✅Anywhere on the core
What is the most basic measurement in fiber optics? -
Correct Answers ✅Optical Power
Loss of 20dB is what reduction in power? - Correct Answers
✅100x reduction in power
Loss of 3dB is what reduction in power? - Correct Answers
✅50% reduction in power
Formula for Attenuation? - Correct Answers ✅10, 2, 1
0dBm is equal to? - Correct Answers ✅1 milliwatt
What does the 'm' in dBm represent? - Correct Answers
✅milliwatt
Which of the following will not affect loss? - Correct
Answers ✅Meter Calibration Wavelength
Why do fiber optic power meters measure loss in dB? -
Correct Answers ✅Measures loss directly
100% SOLVED (Newest 2025)
Which connectors are acceptable in a fiber optic plant -
Correct Answers ✅FOCIS
What does OLTS stand for? - Correct Answers ✅Optical loss
test set
Fiber optic cable is sometimes tested for what before its
installed? - Correct Answers ✅Continuity
Difference between visual fault locator and tracer? - Correct
Answers ✅Amount of optical power put into the fiber
What can find breaks in fibers too close to be seen by an
OTDR? - Correct Answers ✅Visual Fault Locator
Best way to examine a connector? - Correct Answers ✅At
an angle
What is done before inspecting a connector with a
microscope? - Correct Answers ✅Ensure no power is
present
What would happen if you inspected a connector with
excessively high magnification? - Correct Answers ✅Small
scratches look worse than they actually are
, CFOS/T EXAM QUESTIONS AND ANSWERS
100% SOLVED (Newest 2025)
Where are scratches or defects a problem? - Correct
Answers ✅Anywhere on the core
What is the most basic measurement in fiber optics? -
Correct Answers ✅Optical Power
Loss of 20dB is what reduction in power? - Correct Answers
✅100x reduction in power
Loss of 3dB is what reduction in power? - Correct Answers
✅50% reduction in power
Formula for Attenuation? - Correct Answers ✅10, 2, 1
0dBm is equal to? - Correct Answers ✅1 milliwatt
What does the 'm' in dBm represent? - Correct Answers
✅milliwatt
Which of the following will not affect loss? - Correct
Answers ✅Meter Calibration Wavelength
Why do fiber optic power meters measure loss in dB? -
Correct Answers ✅Measures loss directly
