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HAM
Trainer
Readiness
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Checkpoint
Group T9A
11 questions from the official pool, drawn by ID — exact wording, never retyped.
T9A01
What is a beam antenna?
A
An antenna built from square aluminum beams
B
An omnidirectional antenna invented by Clarence Beam
C
An antenna that concentrates signals in one direction
D
An antenna that focuses the signal into two intense rays
T9A02
Which of the following describes a type of antenna loading?
A
Electrically lengthening by inserting inductors in radiating elements
B
Inserting a resistor in the radiating portion of the antenna to make it resonant
C
Installing a spring in the base of a mobile vertical antenna to make it more flexible
D
Strengthening the radiating elements of a beam antenna to better resist wind damage
T9A03
How is the polarization of an antenna described?
A
By the shape of the driven element
B
By the orientation of the electric field
C
By the orientation of the magnetic field
D
By the direction of radiation
T9A04
What is a disadvantage of a handheld radio transceiver's short flexible antenna compared to a full-sized quarter-wave antenna?
A
It has low efficiency
B
It transmits only circularly polarized signals
C
It is more susceptible to receiver desensitization
D
It only works on analog signals, not digital ones
T9A05
Which of the following increases the resonant frequency of a dipole antenna?
A
Lengthening it
B
Inserting coils in series with radiating wires
C
Shortening it
D
Adding capacitive loading to the ends of the radiating wires
T9A06
Which of the following types of antennas offers the greatest gain?
A
5/8 wave vertical
B
Isotropic
C
J pole
D
Yagi
T9A07
What is a potential drawback of using a handheld VHF transceiver inside a vehicle that lacks an externally mounted antenna?
A
Signal strength is reduced due to the shielding effect of the vehicle
B
The bandwidth of the antenna will decrease, increasing SWR
C
The SWR might decrease, decreasing the signal strength
D
The handheld will overheat due to reflected power in the vehicle
T9A08
Why is a 19-inch-long vertical antenna often used on 2 meters?
A
It has high gain
B
It is a resonant half-wave
C
It is a resonant quarter-wave
D
It has low RF radiation exposure
T9A09
What is an advantage of a 5/8-wavelength whip antenna for VHF or UHF mobile service compared to a 1/4-wave antenna?
A
It has more gain
B
It radiates at a higher angle
C
It has lower SWR
D
It has lower impedance
T9A10
In which direction does a half-wave dipole antenna radiate the strongest signal?
A
Equally in all directions
B
Off the ends of the antenna
C
In the direction of the feed line
D
Broadside to the antenna
T9A11
What is antenna gain?
A
The additional power that is added to the transmitter power
B
The additional power that is required in the antenna when transmitting on a higher frequency
C
The increase in signal strength in a specified direction compared to a reference antenna
D
The increase in impedance on receive or transmit compared to a reference antenna
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