Question 1

Cavity resonators are metal-walled chambers fitted with devices for admitting and extracting what type of energy?

Accepted Answer

A) RF 
B) Electromagnetic 
C) Magnetic field 
D) Microwave 
A) RF 
B) Electromagnetic 
C) Magnetic field 
D) Microwave B

Question 2

___________ transfers energy from a primary to an adjacent secondary waveguide for energy traveling in the main guide in one direction only.

Accepted Answer

A) Microstrip 
B) Pulse repetition frequency 
C) Directional coupler 
D) Stripline 
A) Microstrip 
B) Pulse repetition frequency 
C) Directional coupler 
D) Stripline C

Question 3

What is the most popular shape of a waveguide?

Accepted Answer

A) Octagonal 
B) Circular 
C) Rectangular 
D) Square 
A) Octagonal 
B) Circular 
C) Rectangular 
D) Square C

Question 4

Transmission lines,antennas,and fiber optics are the commonly known means of _______________.

Accepted Answer

A) information-carrying capacity 
B) high-frequency transmission 
C) low-frequency transmission 
D) electromagnetic waves 
A) information-carrying capacity 
B) high-frequency transmission 
C) low-frequency transmission 
D) electromagnetic waves

Question 5

The process of locating objects via radar requires the measurement of three coordinates: range,angle of azimuth,and angle of _____________.

Accepted Answer

A) antenna curve 
B) energy transmission 
C) elevation 
D) echo signal 
A) antenna curve 
B) energy transmission 
C) elevation 
D) echo signal

Question 6

The resonant frequency of a cavity may be varied by changing any of three parameters: cavity inductance,cavity capacitance,and cavity__________.

Accepted Answer

A) range 
B) shape 
C) mode 
D) volume 
A) range 
B) shape 
C) mode 
D) volume

Question 7

Waveguides exhibit extremely low loss and are capable of handling very high __________.

Accepted Answer

A) radiation 
B) powers 
C) frequencies 
D) circuits 
A) radiation 
B) powers 
C) frequencies 
D) circuits

Question 8

The series tee is often used for _____________.

Accepted Answer

A) a single antenna to be used for both transmission and reception 
B) adjusting signal levels 
C) physically reversing a directional coupler 
D) impedance matching 
A) a single antenna to be used for both transmission and reception 
B) adjusting signal levels 
C) physically reversing a directional coupler 
D) impedance matching

Question 9

How many feet is the nautical mile,which is the accepted unit of distance in radar?

Accepted Answer

A) 6076 ft. 
B) 6000 ft. 
C) 5280 ft. 
D) 2000 ft. 
A) 6076 ft. 
B) 6000 ft. 
C) 5280 ft. 
D) 2000 ft.

Question 10

Which of the following is one of the original and still most widely used applications for waveguide?

Accepted Answer

A) FM broadcasting 
B) Radar installations 
C) Transmission lines 
D) AM broadcasting 
A) FM broadcasting 
B) Radar installations 
C) Transmission lines 
D) AM broadcasting

Question 11

Like coaxial lines,waveguides are perfectly shielded,which allows for no _____________.

Accepted Answer

A) radiation loss 
B) power loss 
C) energy loss 
D) noise 
A) radiation loss 
B) power loss 
C) energy loss 
D) noise

Question 12

When did the first practical use of waveguides occur?

Accepted Answer

A) Development of microwaves 
B) Development of Doppler radar for traffic control 
C) Development of radar during World War II 
D) Development of radar for space rendezvous 
A) Development of microwaves 
B) Development of Doppler radar for traffic control 
C) Development of radar during World War II 
D) Development of radar for space rendezvous

Question 13

Why is a waveguide often pressurized with nitrogen?

Accepted Answer

A) To prevent contamination 
B) To change the plane of polarization of the wave 
C) To attach or weld a metal plate at the end of the waveguide 
D) To prevent reflections 
A) To prevent contamination 
B) To change the plane of polarization of the wave 
C) To attach or weld a metal plate at the end of the waveguide 
D) To prevent reflections

Question 14

Which of the following is the most dominant mode of operation because it is the most "natural" one for operation?

Accepted Answer

A) RG-52/U 
B) TE10 
C) GHz 
D) TM 
A) RG-52/U 
B) TE10 
C) GHz 
D) TM

Question 15

Which of the following would be a use of a variable attenuator at microwave frequencies?

Accepted Answer

A) To prevent reflections 
B) To change the physical direction of propagation 
C) To measure signal levels 
D) To change the plane of polarization of the wave 
A) To prevent reflections 
B) To change the physical direction of propagation 
C) To measure signal levels 
D) To change the plane of polarization of the wave

Question 16

Any surface separating two media of distinctly different conductivities or permittivities has a guiding effect on _________________.

Accepted Answer

A) fiber-optic transmissions 
B) propagation direction 
C) frequency ranges 
D) electromagnetic waves 
A) fiber-optic transmissions 
B) propagation direction 
C) frequency ranges 
D) electromagnetic waves

Question 17

For a wave to exist in a waveguide,it must satisfy __________ equations throughout the waveguide.

Accepted Answer

A) Doppler's 
B) Smith's 
C) Maxwell's 
D) Ohm's 
A) Doppler's 
B) Smith's 
C) Maxwell's 
D) Ohm's

Question 18

In what form does energy propagate down a waveguide?

Accepted Answer

A) Radio signal 
B) Magnetic field 
C) Radar pulse 
D) Doppler radar 
A) Radio signal 
B) Magnetic field 
C) Radar pulse 
D) Doppler radar

Question 19

It is often necessary to change the physical direction of propagation or the wave's polarization in waveguides. What is the purpose of a twist section?

Accepted Answer

A) To produce shunting reactance across the guide 
B) To change the plane of polarization of the wave 
C) To change the physical direction of propagation 
D) So low received power does no damage to the powerful transmitter output 
A) To produce shunting reactance across the guide 
B) To change the plane of polarization of the wave 
C) To change the physical direction of propagation 
D) So low received power does no damage to the powerful transmitter output

Question 20

What is necessary for radar to provide an accurate directional picture?

Accepted Answer

A) Highly directive antenna 
B) Cavity capacitance 
C) Electromagnetic energy 
D) Maximum usable range 
A) Highly directive antenna 
B) Cavity capacitance 
C) Electromagnetic energy 
D) Maximum usable range

Cavity resonators are metal-walled chambers fitted with devices for admitting and extracting what type of energy?

___________ transfers energy from a primary to an adjacent secondary waveguide for energy traveling in the main guide in one direction only.

What is the most popular shape of a waveguide?

Transmission lines,antennas,and fiber optics are the commonly known means of _______________.

The process of locating objects via radar requires the measurement of three coordinates: range,angle of azimuth,and angle of _____________.

The resonant frequency of a cavity may be varied by changing any of three parameters: cavity inductance,cavity capacitance,and cavity__________.

Waveguides exhibit extremely low loss and are capable of handling very high __________.

The series tee is often used for _____________.

How many feet is the nautical mile,which is the accepted unit of distance in radar?

Which of the following is one of the original and still most widely used applications for waveguide?

Like coaxial lines,waveguides are perfectly shielded,which allows for no _____________.

When did the first practical use of waveguides occur?

Why is a waveguide often pressurized with nitrogen?

Which of the following is the most dominant mode of operation because it is the most "natural" one for operation?

Which of the following would be a use of a variable attenuator at microwave frequencies?

Any surface separating two media of distinctly different conductivities or permittivities has a guiding effect on _________________.

For a wave to exist in a waveguide,it must satisfy __________ equations throughout the waveguide.

In what form does energy propagate down a waveguide?

It is often necessary to change the physical direction of propagation or the wave's polarization in waveguides. What is the purpose of a twist section?

What is necessary for radar to provide an accurate directional picture?

Fundamental Communications Concept

Amplitude Modulation

Angle Modulation

Communications Circuits

Transmitters

Receivers

Digital Communications Techniques

Digital Modulation and Demodulation

Telephone Networks

Wireless Communications Systems

Computer Communication and the Internet

Transmission Lines

Wave Propagation

Antennas

Fiber Optics

Filters

Exam 15: Waveguides and Radar

Cavity resonators are metal-walled chambers fitted with devices for admitting and extracting what type of energy?

___________ transfers energy from a primary to an adjacent secondary waveguide for energy traveling in the main guide in one direction only.

What is the most popular shape of a waveguide?

Transmission lines,antennas,and fiber optics are the commonly known means of _______________.

The process of locating objects via radar requires the measurement of three coordinates: range,angle of azimuth,and angle of _____________.

The resonant frequency of a cavity may be varied by changing any of three parameters: cavity inductance,cavity capacitance,and cavity__________.

Waveguides exhibit extremely low loss and are capable of handling very high __________.

The series tee is often used for _____________.

How many feet is the nautical mile,which is the accepted unit of distance in radar?

Which of the following is one of the original and still most widely used applications for waveguide?

Like coaxial lines,waveguides are perfectly shielded,which allows for no _____________.

When did the first practical use of waveguides occur?

Why is a waveguide often pressurized with nitrogen?

Which of the following is the most dominant mode of operation because it is the most "natural" one for operation?

Which of the following would be a use of a variable attenuator at microwave frequencies?

Any surface separating two media of distinctly different conductivities or permittivities has a guiding effect on _________________.

For a wave to exist in a waveguide,it must satisfy __________ equations throughout the waveguide.

In what form does energy propagate down a waveguide?

It is often necessary to change the physical direction of propagation or the wave's polarization in waveguides. What is the purpose of a twist section?

What is necessary for radar to provide an accurate directional picture?

Fundamental Communications Concept

Amplitude Modulation

Angle Modulation

Communications Circuits

Transmitters

Receivers

Digital Communications Techniques

Digital Modulation and Demodulation

Telephone Networks

Wireless Communications Systems

Computer Communication and the Internet

Transmission Lines

Wave Propagation

Antennas

Fiber Optics

Filters