ETA FIBER OPTIC INSTALLER
CERTIFICATION STUDY QUESTIONS
24-25|SOLVED!!
Light is electromagnetic energy with a _____ frequency and a _____
wavelength compared to radios. - ACCURATE ANSWERS✔✔ Higher;
shorter
What type of light is used in fiber optic transmissions? - ACCURATE
ANSWERS✔✔ Infrared (IR)
What are the four items needed for a fiber optic system to work? -
ACCURATE ANSWERS✔✔ Transmitter, fiber optic cable, receiver,
and connector
1 mW is the same as what in dBm? - ACCURATE ANSWERS✔✔ 0
dBm (absolute power)
How is the power measured in fiber optics? - ACCURATE
ANSWERS✔✔ dBm
What fiber optic wavelength has the lowest loss? - ACCURATE
ANSWERS✔✔ 1550 nm wavelength
, What wavelength windows are used most for fiber optic
communications? - ACCURATE ANSWERS✔✔ 850 nm, 1300 nm, and
1550 nm wavelengths
What year was fiber optic cable first used in commercial telephone
systems in the U.S.? - ACCURATE ANSWERS✔✔ 1977
What light source is used for singlemode fiber? - ACCURATE
ANSWERS✔✔ Laser diode
What two light sources are used with multimode fiber? - ACCURATE
ANSWERS✔✔ LED and VCSEL
All wavelengths of light travel at the same speed. (true or false; why) -
ACCURATE ANSWERS✔✔ False; different wavelengths of light travel
at different velocities
Which type of fiber has the larger core size: singlemode or multimode? -
ACCURATE ANSWERS✔✔ Multimode
What is OSHA responsible for? - ACCURATE ANSWERS✔✔ OSHA is
responsible for enforcing it's standards on regulated entities
What are two ways to reduce modal dispersion? - ACCURATE
ANSWERS✔✔ Use a smaller core; use graded-index fiber
CERTIFICATION STUDY QUESTIONS
24-25|SOLVED!!
Light is electromagnetic energy with a _____ frequency and a _____
wavelength compared to radios. - ACCURATE ANSWERS✔✔ Higher;
shorter
What type of light is used in fiber optic transmissions? - ACCURATE
ANSWERS✔✔ Infrared (IR)
What are the four items needed for a fiber optic system to work? -
ACCURATE ANSWERS✔✔ Transmitter, fiber optic cable, receiver,
and connector
1 mW is the same as what in dBm? - ACCURATE ANSWERS✔✔ 0
dBm (absolute power)
How is the power measured in fiber optics? - ACCURATE
ANSWERS✔✔ dBm
What fiber optic wavelength has the lowest loss? - ACCURATE
ANSWERS✔✔ 1550 nm wavelength
, What wavelength windows are used most for fiber optic
communications? - ACCURATE ANSWERS✔✔ 850 nm, 1300 nm, and
1550 nm wavelengths
What year was fiber optic cable first used in commercial telephone
systems in the U.S.? - ACCURATE ANSWERS✔✔ 1977
What light source is used for singlemode fiber? - ACCURATE
ANSWERS✔✔ Laser diode
What two light sources are used with multimode fiber? - ACCURATE
ANSWERS✔✔ LED and VCSEL
All wavelengths of light travel at the same speed. (true or false; why) -
ACCURATE ANSWERS✔✔ False; different wavelengths of light travel
at different velocities
Which type of fiber has the larger core size: singlemode or multimode? -
ACCURATE ANSWERS✔✔ Multimode
What is OSHA responsible for? - ACCURATE ANSWERS✔✔ OSHA is
responsible for enforcing it's standards on regulated entities
What are two ways to reduce modal dispersion? - ACCURATE
ANSWERS✔✔ Use a smaller core; use graded-index fiber
