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- FCC Novice Exam Question Pool. Subelement 2I.
- Antennas and Feed Lines. 3 Questions.
-
-
- One (1) question must be from the following:
- ------------------------------------------------
-
- 2I 1.1 A
- What is the approximate length of a Half-Wave Dipole
- antenna for 3725 kHz?
-
- A. 126 ft.
- B. 81 ft.
- C. 63 ft.
- D. 40 ft.
-
-
- 2I 1.2 D
- What is the approximate length of a Half-Wave Dipole
- antenna for 7125 kHz?
-
- A. 84 ft.
- B. 42 ft.
- C. 33 ft.
- D. 66 ft.
-
-
- 2I 1.3 C
- What is the approximate length of a Half-Wave Dipole
- antenna for 21,125 kHz?
-
- A. 44 ft.
- B. 28 ft.
- C. 22 ft.
- D. 14 ft.
-
-
- 2I 1.4 C
- What is the approximate length of a Half-Wave Dipole
- antenna for 28,150 kHz?
-
- A. 22 ft.
- B. 11 ft.
- C. 17 ft.
- D. 34 ft.
-
-
- 2I 1.5 D
- How is the approximate length of a Half-Wave Dipole
- antenna calculated?
-
- A. By substituting the desired operating frequency
- for f in the formula : 150/f (MHz.)
- B. By substituting the desired operating frequency
- for f in the formula : 234/f (MHz.)
- C. By substituting the desired operating frequency
- for f in the formula : 300/f (MHz.)
- D. By substituting the desired operating frequency
- for f in the formula : 468/f (MHz.)
-
-
- 2I 2.1 D
- What is the approximate length of a Quarter-Wave Vertical
- antenna adjusted to resonate at 3725 kHz.?
-
- A. 20 ft.
- B. 32 ft.
- C. 40 ft.
- D. 63 ft.
-
-
- 2I 2.2 D
- What is the approximate length of a Quarter-Wave Vertical
- antenna adjusted to resonate at 7125 kHz.?
-
- A. 11 ft.
- B. 16 ft.
- C. 21 ft.
- D. 33 ft.
-
-
- 2I 2.3 B
- What is the approximate length of a Quarter-Wave Vertical
- antenna adjusted to resonate at 21,125 kHz.?
-
- A. 7 ft.
- B. 11 ft.
- C. 14 ft.
- D. 22 ft.
-
-
- 2I 2.4 B
- What is the approximate length of a Quarter-Wave Vertical
- antenna adjusted to resonate at 28,150 kHz.?
-
- A. 5 ft.
- B. 8 ft.
- C. 11 ft.
- D. 16 ft.
-
-
- 2I 2.5 A
- When a vertical antenna is lengthened,
- what happens to its resonant frequency?
-
- A. It decreases.
- B. It increases.
- C. It stays the same.
- D. It doubles.
-
-
- 2I 2.6 C
- What is the approximate length (in inches) of a
- 5/8 Wavelength Vertical antenna for the 220 MHz. band?
-
- A. 19.5 Inches.
- B. 22 Inches.
- C. 28.5 Inches
- D. 32 Inches.
-
-
- 2I 2.7 B
- Why do many Amateurs use a 5/8 Wavelength Vertical
- Antenna rather that a 1/4 Wavelength Antenna
- for their VHF of UHF mobile stations?
-
- A. A 5/8 Wavelength Antenna can handle more
- power than a 1/4 Wavelength antenna.
- B. A 5/8 Wavelength Antenna has more
- gain than a 1/4 Wavelength antenna.
- C. A 5/8 Wavelength Antenna exhibits less
- corona loss than a 1/4 Wavelength antenna.
- D. A 5/8 Wavelength Antenna looks more like
- a CB Antenna, so it does not attract as
- much attention as a 1/4 Wavelength Antenna.
-
-
- One (1) question must be from the following:
- ------------------------------------------------
-
- 2I 3.1 D
- What is COAXIAL CABLE?
-
- A. Two parallel conductors encased along the
- edges of a flat plastic ribbon.
- B. Two parallel conductors held at a fixed distance
- from each other by insulating rods.
- C. Two conductors twisted around each other
- in a double spiral.
- D. A center conductor encased in insulating material
- which is covered by a conducting sleeve or shield
- and encased in a weatherproof jacket.
-
-
- 2I 3.2 B
- What kind of antenna feed line is constructed of a center
- conductor encased in insulation which is then covered
- by an outer conducting shield and weatherproof jacket?
-
- A. Twin Lead.
- B. Coaxial Cable.
- C. Open-Wire Feed Line.
- D. Waveguide.
-
-
- 2I 3.3 B
- What are some advantages in using Coaxial Cable
- as an antenna feed line?
-
- A. It is easy to make at home, and it has a characteristic
- impedance in the range of most common amateur antennas.
- B. It is weatherproof, and it has a characteristic
- impedance in the range of most common amateur antennas.
- C. It can be operated at a higher SWR than
- twin lead, and is weatherproof.
- D. It is unaffected by nearby metallic objects, and has a
- characteristic impedance that is higher than twin lead.
-
-
- 2I 3.4 B
- What commonly available antenna feed line can be buried
- directly in the ground for some distance
- without adverse effects?
-
- A. Twin Lead.
- B. Coaxial Cable.
- C. Parallel Conductor.
- D. Twisted Pair.
-
-
- 2I 3.5 C
- When an antenna feed line must be located near grounded
- metal objects, which commonly available feed line
- should be used?
-
- A. Twisted Pair.
- B. Twin Lead.
- C. Coaxial Cable.
- D. Ladder Line.
-
-
- 2I 4.1 B
- What is Parallel Conductor Feed Line?
-
- A. Two conductors twisted around each other
- in a double spiral.
- B. Two parallel conductors held a uniform distance
- apart by insulating material.
- C. A conductor encased in insulating material which is then
- covered by a conducting shield and a weatherproof jacket.
- D. A metallic pipe whose diameter is equal to or slightly
- greater than the wavelength of the signal being carried.
-
-
- 2I 4.2 C
- How can TV TYPE TWIN LEAD be used as a feed line?
-
- A. By carefully running the feed line parallel to a
- metal post to insure self resonance.
- B. TV Type Twin Lead can not be used
- in an Amateur Radio Station.
- C. By installing an impedance matching network between
- the transmitter and the feed line.
- D. By using a high power amplifier and installing a power
- attenuator between the transmitter ad feed line.
-
-
-
- 2I 4.3 D
- What are some advantages of using Parallel Conductor Feed Line?
-
- A. It has a lower characteristic impedance than coaxial cable
- and will operate at a higher SWR than coaxial cable.
- B. It will operate at a higher SWR than coaxial cable
- and it is unaffected by nearby metal objects.
- C. It has a lower characteristic impedance than coaxial cable
- and has less loss than coaxial cable.
- D. It will operate at a higher SWR than coaxial cable
- and has less loss than coaxial cable.
-
-
- 2I 4.4 A
- What are some disadvantages in using parallel
- conductor feed line?
-
- A. It is affected by nearby metallic objects and it has a
- characteristic impedance that is too high for direct
- connection to most Amateur transmitters.
- B. It is more dificult to make at home than Coaxial Cable
- and it can not be operated at high SWR.
- C. It is affected by nearby metallic objects and it can not
- handle the power output of typical Amateur transmitters.
- D. It has a characteristic impedance that is too high for
- direct connection to most Amateur transmitters and
- it will operate at high SWR.
-
-
- 2I 4.5 B
- What kind of antenna feed line is constructed of two
- parallel conductors maintained a uniform distance
- apart by insulated spreaders?
-
- A. Coaxial Cable.
- B. Ladder Line open conductor line.
- C. Twin Lead in a plastic ribbon.
- D. Twisted Pair.
-
-
- One (1) question must be from the following:
- ------------------------------------------------
-
- 2I 5.1 A
- What type of pattern is produced by
- a 5/8 Wavelength Vertical Antenna?
-
- A. A pattern with the transmitted signal
- spread out equally in all directions.
- B. A pattern with more of the signal concentrated
- in one direction than in other directions.
- C. A pattern with most of the transmitted signal
- concentrated in two opposite directions.
- D. A pattern with most of the transmitted signal
- concentrated at high radiation angles.
-
-
- 2I 6.1 B
- What type of pattern is produced by a YAGI Antenna?
-
- A. A pattern with the transmitted signal
- spread out equally in all directions.
- B. A pattern with more of the signal concentrated
- in one direction than in other directions.
- C. A pattern with most of the transmitted signal
- concentrated in two opposite directions.
- D. A pattern with most of the transmitted signal
- concentrated at high radiation angles.
-
-
- 2I 6.2 D
- On the Yagi Antenna show in Figure 2I-6,
- what is the name of section B ?
-
- A. Director.
- B. Reflector.
- C. Boom.
- D. Driven Element.
-
-
- 2I 6.3 A
- On the Yagi Antenna show in Figure 2I-6,
- what is the name of section C ?
-
- A. Director.
- B. Reflector.
- C. Boom.
- D. Driven Element.
-
-
- 2I 6.4 B
- On the Yagi Antenna show in Figure 2I-6,
- what is the name of section A ?
-
- A. Director.
- B. Reflector.
- C. Boom.
- D. Driven Element.
-
-
- 2I 6.5 C
- Approximately how long (in wavelengths)
- is the driven element of a YAGI Antenna?
-
- A. 1/4 Wavelength.
- B 1/3 Wavelength.
- C. 1/2 Wavelength.
- D. 1 Wavelength.
-
-
- ------------------------------------------------
-
- End of Subelement 2I.
-