3-52. For a waveguide to be terminated with a resistive load, that load must be matched to which of the following properties of the waveguide?
- The bandwidth
- The frequency
- The inductance
- The characteristic impedance
3-53. A resistive device with the sole purpose of absorbing all the energy in a waveguide without causing reflections is a/an
- iris
- horn
- antenna
- dummy load
3-54. A resistive load most often dissipates energy in which of the following forms?
- Heat
- Light
- Magnetic
- Electrical
3-55. Reflections will be caused by an abrupt change in which of the following waveguide's physical characteristics?
- Size and shape only
- Size and dielectric material only
- Dielectric material and shape only
- Size, shape, and dielectric material
3-56. A waveguide bend that in the E and H plane must be greater than. two wavelengths to prevent
- cracking
- reflections
- energy gaps
- electrolysis
3-57. A flexible waveguide is used in short sections because of the power-loss disadvantages. What is the cause of this power loss?
- Walls are not smooth
- E and H fields are not perpendicular
- Cannot be terminated in its characteristic impedance
- Wall size cannot be kept consistent
3-58. The choke joint is used for what purpose in a waveguide?
- To reduce standing waves
- To restrict the volume of electron flow
- To prevent the field from rotating
- To provide a joint that can be disassembled during maintenance
3-59. A circular waveguide is normally used in a rotating joint because rotating a rectangular waveguide would cause which of the following unwanted conditions?
- Oscillation
- Large power
- Decrease in bandwidth
- Field—pattern distortion
3-60. In your waveguide inspection, you should be alert for which of the following problems?
- Corrosion
- Damaged surfaces
- Improperly sealed joints
- Each of the above
3-61. What type of corrosion occurs when dissimilar metals are in contact with each other?
- Contact
- Metallic
- Electrical
- Electrolytic
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