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