Which of the following is not a part of a high-intensity discharge lamp?
A. base
B. filament
C. glass envelope
D. arc tube
Answer: B
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The boom angle is the angle between the boom center line and the _____.
a. lifting line b. horizontal plane c. vertical plane d. luffing jib, if present
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A basic antenna element is tuned to ________the wavelength of a carrier frequency.
A. 1/8 B. 1/4 C. 1/2 D. 3/4
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In the _______________ type of building exterior wall construction, wall sections are actually constructed on site and lifted into position.