8.
Flexible sections of waveguide are used only when a special type of
bend is needed.
Flexible sections of waveguide are seldom used
because they
a.
have poor insulation.
b.
change the polarization of the wave.
c.
absorb energy in their resistive surfaces.
d.
cause reflections that result in a loss of power.
9.
There are several devices used to match the load impedance to the
impedance of the waveguide. Some of these devices include the
a.
shutter, slug tuner, and horn.
b.
slug tuner, horn, and window tuner.
c.
window tuner, shutter, and resistive card.
d.
resistive card, window tuner, and slug tuner.
10.
When test equipment is used to observe the transmitted pulse spectrum,
the power level of the pulse must be reduced to protect the test
equipment.
The device that will reduce the power without causing
reflections in the waveguide is a
a.
resistive card attenuator.
b.
shutter attenuator.
c.
window tuner.
d.
slug tuner.
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