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ATT Week 11 Test (FC)/68 Q’s and A’s 2024
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ATT Week 11 Test (FC)/68 Q’s and A’s 2024
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ATT Week 11 Test (FC)/68 Q’s andA’s 2024
What causes refraction? - -A change in the speed of light.
- What is the most common optical detector? - -Photo Diodes.
- __________ determines the color of light. - -Wavelength
- What affects a detectors responsivity? - -Changes in wavelength.
- The range of frequency that an optical fiber cable has is known
as___________. - -Bandwidth
- What optical fiber cable is made of several concentric layers? - -Multimode
graded-index
- What is a superheterodyne good for? - -Extreme sensitivity and stability.
- A synchronizer performs the task of __________. - -Timing
- What part does timing rely on? - -Synchronizer.
- What information does RF energy reflected from an object (echo) provide a
RADAR? - -Bearing, range, velocity, and elevation.
- ___________ is the effect of signal loss associated with high frequency
currents flowing near the outer surface of the conductor. - -Skin effect
- What is characteristic impedance? - -The distributed inductance and
capacitance of a line.
- What transmission lines have the largest surface area? - -Waveguides.
- ____________ is/are the result of improper waveguide joining. - -Standing
waves
- What is the ability of an antenna to act as an antenna and a receiver
called? - -Reciprocity.
- What is a truncated parabolic antenna used for? - -RADAR microwave
system.
- Power gain is the measure of an antenna's ___________. - -efficiency
, - How is the efficiency of an antenna measured? - -The use of a reference
antenna.
- What kind of beam is needed to determine bearing? - -Narrow, horizontal.
- What effect does FTC have on receiver gain? - -0 effect.
- A radar mile measured in time is how long? - -12.36 microseconds.
- How long is one nautical mile? - -6,080 ft.
- A surface search radar uses a frequency of ________. - -20 GHz
- A ________ is shaped like a dish. - -parabolic RADAR
- What kind of RADAR is used to detect an destroy an incoming missile? - -
3D
- What function does the receiver perform? - -It processes pulses from the
antenna for display.
- ___________ is the part of the transmitter that determines the operating
band of a RADAR system. - -Magnetron
- The operational pressures of high and low power dry air systems are
_______ high, and ________ low. - -25-35 psi, 1-8 psi
- What is dry air used for in a waveguide? - -To prevent arcing.
- A __________ uses refrigerant to remove liquid and oil. - -type one
dehydrator
- What is the least efficient type of equipment cooling? - -Convection.
- What is the purpose of a duplex strainer? - -To remove debris from
seawater.
- A -3DdB change____________________. - -decreases the output by 50%
- A +3 dB change_____________. - -increases the output by 100%
- RADAR is an acronym for what? - -Radio Detection and Ranging.
- The type of losses associated with transmission lines are what? - -
Resistive, inductive, and capacitive.
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