Exam (elaborations)
ATT Week 11 Test (FC)/68 Q’s and A’s 2024
- Course
- Institution
ATT Week 11 Test (FC)/68 Q’s and A’s 2024
[Show more]
Content preview
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.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Nursephil2023. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
71498 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now