ATO2 NAVY ADVANCEMENT FINAL EXAMS
ACTUAL QUESTIONS AND ANSWERS SURE A+
✔✔What is the minimum resistance for personnel ground straps? - ✔✔250,000 ohms
✔✔What color is material that is antistatic? - ✔✔Pink
✔✔Define fiber optics. - ✔✔Fiber optics is the branch of optical technology concerned
with the transmission of radiant power (light energy) through fibers.
✔✔Describe the basic functions of a fiber optic data link. - ✔✔The basic functions of a
fiber optic data link are to convert an electrical input signal to an optical signal, send the
optical signal over an optical fiber and convert the optical signal back to an electrical
signal.
✔✔List the three parts of a fiber optic data link. - ✔✔Transmitter, optical fiber, and
receiver.
✔✔What mechanisms in the fiber waveguides weaken and distort the optical signal? -
✔✔Scattering, absorption, and dispersion.
✔✔What effect does noise have on the fiber optic signal? - ✔✔Noise obscures or
reduces the quality of the signal
, ✔✔Define loss. - ✔✔Loss is the decrease in the amount of light reaching the end of the
fiber.
✔✔In 1969, what did several scientists conclude about optical fiber loss? - ✔✔Impurities
in the fiber material caused the signal loss in optical fibers. The basic fiber material did
not prevent the light signal from reaching the end of the fiber.
✔✔How can loss be reduced during construction (or fabrication) of optical fibers? -
✔✔By removing the impurities from optical fiber.
✔✔What are the two basic types of optical fibers? - ✔✔Multimode and single mode
fibers.
✔✔Which type of optical fiber (multimode or single mode) tends to have lower loss and
produces less signal distortion? - ✔✔Single mode fiber.
✔✔What optical fiber properties reduce connection loss in short-distance systems? -
✔✔Larger fiber core and higher fiber numerical aperture (NA)
✔✔In fiber optic systems, designers consider what trade-offs? - ✔✔Trade-offs in fiber
properties, types of connections, optical sources, and detector types in military and
subscriber-loop applications.
✔✔List seven advantages of fiber optics over electrical systems. - ✔✔Advantages of
fiber optics are improved system performance, immunity to electrical noise, signal
security, electrical isolation, reduced size and weight, environmental protection, and
overall system economy.
✔✔What is the brain of a computer system? - ✔✔The central processing unit.
✔✔How many sections make up the central processing unit? - ✔✔Three
✔✔What are the names of the sections that make up the cpu? - ✔✔Control section,
internal storage section, arithmetic¬-logic section
✔✔The control section can be compared to what? - ✔✔A telephone exchange
✔✔What are the four major types of instructions in the control section? - ✔✔Transfer,
arithmetic, logic, and control
✔✔What capability allows the arithmetic/logic section to test various conditions
encountered during processing and take action based on the result? - ✔✔Logic
ACTUAL QUESTIONS AND ANSWERS SURE A+
✔✔What is the minimum resistance for personnel ground straps? - ✔✔250,000 ohms
✔✔What color is material that is antistatic? - ✔✔Pink
✔✔Define fiber optics. - ✔✔Fiber optics is the branch of optical technology concerned
with the transmission of radiant power (light energy) through fibers.
✔✔Describe the basic functions of a fiber optic data link. - ✔✔The basic functions of a
fiber optic data link are to convert an electrical input signal to an optical signal, send the
optical signal over an optical fiber and convert the optical signal back to an electrical
signal.
✔✔List the three parts of a fiber optic data link. - ✔✔Transmitter, optical fiber, and
receiver.
✔✔What mechanisms in the fiber waveguides weaken and distort the optical signal? -
✔✔Scattering, absorption, and dispersion.
✔✔What effect does noise have on the fiber optic signal? - ✔✔Noise obscures or
reduces the quality of the signal
, ✔✔Define loss. - ✔✔Loss is the decrease in the amount of light reaching the end of the
fiber.
✔✔In 1969, what did several scientists conclude about optical fiber loss? - ✔✔Impurities
in the fiber material caused the signal loss in optical fibers. The basic fiber material did
not prevent the light signal from reaching the end of the fiber.
✔✔How can loss be reduced during construction (or fabrication) of optical fibers? -
✔✔By removing the impurities from optical fiber.
✔✔What are the two basic types of optical fibers? - ✔✔Multimode and single mode
fibers.
✔✔Which type of optical fiber (multimode or single mode) tends to have lower loss and
produces less signal distortion? - ✔✔Single mode fiber.
✔✔What optical fiber properties reduce connection loss in short-distance systems? -
✔✔Larger fiber core and higher fiber numerical aperture (NA)
✔✔In fiber optic systems, designers consider what trade-offs? - ✔✔Trade-offs in fiber
properties, types of connections, optical sources, and detector types in military and
subscriber-loop applications.
✔✔List seven advantages of fiber optics over electrical systems. - ✔✔Advantages of
fiber optics are improved system performance, immunity to electrical noise, signal
security, electrical isolation, reduced size and weight, environmental protection, and
overall system economy.
✔✔What is the brain of a computer system? - ✔✔The central processing unit.
✔✔How many sections make up the central processing unit? - ✔✔Three
✔✔What are the names of the sections that make up the cpu? - ✔✔Control section,
internal storage section, arithmetic¬-logic section
✔✔The control section can be compared to what? - ✔✔A telephone exchange
✔✔What are the four major types of instructions in the control section? - ✔✔Transfer,
arithmetic, logic, and control
✔✔What capability allows the arithmetic/logic section to test various conditions
encountered during processing and take action based on the result? - ✔✔Logic
