4 1-29.   The field configuration in waveguides is divided into what two categories? 1.   Half-sine and dominant 2.   Transverse electric and transverse magnetic 3.   Transverse electric and dominant 4.   Transverse magnetic and half-sine 1-30.   With a mode description of TE₁, ₀, what maximum number of half-wave patterns exist across the "a" dimension of a waveguide? 1.   One 2.   Two 3.   Three 4.   Four 1-31.   With the mode description, TE₁, ₁, what maximum number of half-wave patterns exist across the diameter of a circular waveguide? 1.   One 2.   Two 3.   Three 4.   Four 1-32.   To inject or remove energy from a waveguide, which of the following devices could you use? 1.   Slot 2.   Loop 3.   Probe 4.   Each of the above 1-33.   Loose coupling is a method used to reduce the amount of energy being transferred from a waveguide.  How is loose coupling achieved when using a probe? 1.   By doubling the size of the probe 2.   By increasing the length of the probe 3.   By decreasing the length of the probe 4.   By placing the probe directly in the center of energy field 1-34.   Loop coupling is most efficient when the loop is placed at what point in which of the following fields? 1.   At the point of maximum electric field 2.   At the point of minimum electric field 3.   At the point of minimum magnetic field 4.   At the point of maximum magnetic field 1-35.   Increasing the size of the loop wire increases which of the following loop capabilities? 1.   Efficiency 2.   Bandwidth coverage 3.   Power-handling capability 4.   Each of the above 1-36.   A waveguide which is not perfectly impedance matched to its load is not efficient.  Which of the following conditions in a waveguide causes this inefficiency? 1.   Sine waves 2.   Dominant waves 3.   Standing waves 4.   Transverse waves