Canadian Basic pool, section 7-02

Basic

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Subelement 7

Radio Wave Propagation

Section 7-02

ionosphere, ionospheric regions (layers)

7-02-01

What causes the ionosphere to form?

A.
Lightning ionizing the outer atmosphere
Correct Answer
B.
Solar radiation ionizing the outer atmosphere
C.
Release of fluorocarbons into the atmosphere
D.
Temperature changes ionizing the outer atmosphere

7-02-01

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7-02-02

What type of solar radiation is most responsible for ionization in the outer atmosphere?

A.
Microwave
B.
Ionized particle
Correct Answer
C.
Ultraviolet
D.
Thermal

7-02-02

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7-02-03

Which ionospheric region is closest to the earth?

A.
The E region
Correct Answer
B.
The D region
C.
The F region
D.
The A region

7-02-03

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7-02-04

Which region of the ionosphere is the least useful for long distance radio-wave propagation?

A.
The F2 region
B.
The F1 region
Correct Answer
C.
The D region
D.
The E region

7-02-04

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7-02-05

What two sub-regions of ionosphere exist only in the daytime?

A.
Troposphere and stratosphere
B.
Electrostatic and electromagnetic
C.
D and E
Correct Answer
D.
F1 and F2

7-02-05

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7-02-06

When is the ionosphere most ionized?

A.
Dawn
B.
Midnight
Correct Answer
C.
Midday
D.
Dusk

7-02-06

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7-02-07

When is the ionosphere least ionized?

Correct Answer
A.
Shortly before dawn
B.
Just after noon
C.
Just after dusk
D.
Shortly before midnight

7-02-07

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7-02-08

Why is the F2 region mainly responsible for the longest distance radio-wave propagation?

A.
Because it exists only at night
B.
Because it is the lowest ionospheric region
C.
Because it does not absorb radio waves as much as other ionospheric regions
Correct Answer
D.
Because it is the highest ionospheric region

7-02-08

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7-02-09

What is the main reason the 160, 80 and 40 metre amateur bands tend to be useful only for short-distance communications during daylight hours?

A.
Because of auroral propagation
Correct Answer
B.
Because of D-region absorption
C.
Because of magnetic flux
D.
Because of a lack of activity

7-02-09

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7-02-10

During the day, one of the ionospheric layers splits into two parts called:

A.
D1 & D2
B.
E1 & E2
C.
A & B
Correct Answer
D.
F1 & F2

7-02-10

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7-02-11

The position of the E layer in the ionosphere is:

A.
below the D layer
Correct Answer
B.
below the F layer
C.
sporadic
D.
above the F layer

7-02-11

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