ATT "ET" BLOCK 1, WEEK 4 EXAM
WITH ACTUAL COMPLETE QUESTIONS
AND ANSWERS | LATELY UPDATED
2025.
Q: Which type of transmission line has the largest surface area given the same physical
dimensions?
Answer ✔✔ waveguide
Q: What type of loss describes electromagnetic energy escaping the conductor?
Answer ✔✔ radiation
Q: How is electromagnetic energy produced?
Answer ✔✔ current flowing through a conductor
Q: A waveguide is defined as a system of material boundaries capable of guiding __________?
Answer ✔✔ electromagnetic energy
Q: What is a disadvantage for waveguides?
Answer ✔✔ large size for low frequencies
Q: Theoretically, a waveguide of a specific width has no what?
Answer ✔✔ upper frequency limit
Q: Which dimension determines the power handling capability of a waveguide?
Answer ✔✔ "b" - height
,Q: What is the point in a waveguide called where the metallic insulators become too large and
eliminate the bus bar?
Answer ✔✔ cutoff
Q: In an E-type T-junction, if two out-of-phase signals are applied, what will the third arm
produce?
Answer ✔✔ an output equivalent to the summation of the two inputs
Q: In a waveguide, as frequency increases, what happens to the bus bar?
Answer ✔✔ increases in size
Q: The balanced hybrid crystal (magic-T) is found at the input of the radar __________ and is
used as a __________?
Answer ✔✔ receiver, mixer
Q: What is the physical handling and installation of waveguides called?
Answer ✔✔ plumbing
Q: The resonant frequency of a shorted quarter wave transmission line is set by what?
Answer ✔✔ location of the shorting bar
Q: A waveguide can be changed into a cavity resonator by doing what?
Answer ✔✔ sealing the open ends of a waveguide section
Q: A cavity resonator is best described as connecting what?
Answer ✔✔ an infinite number of shorted quarter-wave transmission lines
, Q: Cavity resonators are commonly constructed in what shape?
Answer ✔✔ cylindrical
Q: The power handling of a shorted transmission line is increased by what method?
Answer ✔✔ placing two shorted transmission lines together
Q: The electron path from cathode to anode in a magnetron is curved by what?
Answer ✔✔ use of magnetic field
Q: What causes lead inductance in vacuum tubes?
Answer ✔✔ skin effect
Q: What part of the klystron causes electrons to accelerate and decelerate?
Answer ✔✔ buncher grids and cavity
Q: A klystron can be made into an oscillator by doing what?
Answer ✔✔ connecting feedback terminals
Q: What causes interelectrode capacitance in vacuum tubes?
Answer ✔✔ elements in tubes act like the plates of a capacitor
Q: Why can’t a conventional capacitor and inductor be used to produce a resonant circuit at
microwave frequencies?
Answer ✔✔ the components cannot be manufactured with small enough values
Q: A space completely enclosed by conducting walls is called what?
Answer ✔✔ cavity resonator
WITH ACTUAL COMPLETE QUESTIONS
AND ANSWERS | LATELY UPDATED
2025.
Q: Which type of transmission line has the largest surface area given the same physical
dimensions?
Answer ✔✔ waveguide
Q: What type of loss describes electromagnetic energy escaping the conductor?
Answer ✔✔ radiation
Q: How is electromagnetic energy produced?
Answer ✔✔ current flowing through a conductor
Q: A waveguide is defined as a system of material boundaries capable of guiding __________?
Answer ✔✔ electromagnetic energy
Q: What is a disadvantage for waveguides?
Answer ✔✔ large size for low frequencies
Q: Theoretically, a waveguide of a specific width has no what?
Answer ✔✔ upper frequency limit
Q: Which dimension determines the power handling capability of a waveguide?
Answer ✔✔ "b" - height
,Q: What is the point in a waveguide called where the metallic insulators become too large and
eliminate the bus bar?
Answer ✔✔ cutoff
Q: In an E-type T-junction, if two out-of-phase signals are applied, what will the third arm
produce?
Answer ✔✔ an output equivalent to the summation of the two inputs
Q: In a waveguide, as frequency increases, what happens to the bus bar?
Answer ✔✔ increases in size
Q: The balanced hybrid crystal (magic-T) is found at the input of the radar __________ and is
used as a __________?
Answer ✔✔ receiver, mixer
Q: What is the physical handling and installation of waveguides called?
Answer ✔✔ plumbing
Q: The resonant frequency of a shorted quarter wave transmission line is set by what?
Answer ✔✔ location of the shorting bar
Q: A waveguide can be changed into a cavity resonator by doing what?
Answer ✔✔ sealing the open ends of a waveguide section
Q: A cavity resonator is best described as connecting what?
Answer ✔✔ an infinite number of shorted quarter-wave transmission lines
, Q: Cavity resonators are commonly constructed in what shape?
Answer ✔✔ cylindrical
Q: The power handling of a shorted transmission line is increased by what method?
Answer ✔✔ placing two shorted transmission lines together
Q: The electron path from cathode to anode in a magnetron is curved by what?
Answer ✔✔ use of magnetic field
Q: What causes lead inductance in vacuum tubes?
Answer ✔✔ skin effect
Q: What part of the klystron causes electrons to accelerate and decelerate?
Answer ✔✔ buncher grids and cavity
Q: A klystron can be made into an oscillator by doing what?
Answer ✔✔ connecting feedback terminals
Q: What causes interelectrode capacitance in vacuum tubes?
Answer ✔✔ elements in tubes act like the plates of a capacitor
Q: Why can’t a conventional capacitor and inductor be used to produce a resonant circuit at
microwave frequencies?
Answer ✔✔ the components cannot be manufactured with small enough values
Q: A space completely enclosed by conducting walls is called what?
Answer ✔✔ cavity resonator
