License Exam Quiz #393

de Steve, AE8AT 

After a couple weeks of intensive research for the quiz background, the quiz is rebelling and going with anarchy as the theme. Questions are drawn randomly from the least used sections of each question pool. For the curious, section G9B is the least used portion for the general question pool but leads these least used sections; you have seen 25% of the questions in G9B prior to this quiz. The extra question comes from a section with just under 8% utilization. The technician pool, which went into use months ago, has numerous sections still at 0% and so section T3C is not unique in that regard.

T3C09 What is generally the best time for long-distance 10-meter band propagation via the F region?

A. From dawn to shortly after sunset during periods of high sunspot activity

B. From shortly after sunset to dawn during periods of high sunspot activity

C. From dawn to shortly after sunset during periods of low sunspot activity

D. From shortly after sunset to dawn during periods of low sunspot activity

G9B08 How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

A. It steadily increases

B. It steadily decreases

C. It peaks at about 1/8 wavelength from the end

D. It is unaffected by the location of the feed point

E2E10 Which of these digital modes has the narrowest bandwidth?

A. MFSK16

B. 170 Hz shift, 45-baud RTTY

C. FT8

D. PACTOR IV

Answers:

T3C09 = A

G9B08 = A

E2E10 = C