Canadian Basic pool, section 3-20

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Subelement 3

Station Assembly, Practice and Safety

Section 3-20

antenna and tower safety, lightning protection

3-20-01

Why should you ground all antenna and rotator cables when your amateur station is not in use?

A.
To lock the antenna system in one position
Correct Answer
B.
To protect the station and building from lightning damage
C.
To avoid radio frequency interference
D.
To make sure everything will stay in place

3-20-01

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3-20-02

How can an antenna system be protected from lightning damage?

A.
Install a balun at the antenna feed point
B.
Install an RF choke in the antenna feed line
C.
Install a fuse in the antenna feed line
Correct Answer
D.
Ground all antennas when they are not in use

3-20-02

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3-20-03

How can amateur station equipment best be protected from lightning damage?

Correct Answer
A.
Disconnect all equipment from the power lines and antenna cables
B.
Use heavy insulation on the wiring
C.
Never turn off the equipment
D.
Disconnect the ground system from all radios

3-20-03

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3-20-04

What equipment should be worn for working on an antenna tower?

A.
A reflective vest of approved color
Correct Answer
B.
Approved equipment in accordance with provincial safety standards concerning climbing
C.
A flashing red, yellow or white light
D.
A grounding chain

3-20-04

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3-20-05

Why should you wear a safety belt if you are working on an antenna tower?

A.
To safely bring any tools you might use up and down the tower
B.
To keep the tower from becoming unbalanced while you are working
Correct Answer
C.
To prevent you from accidentally falling
D.
To safely hold your tools so they don't fall and injure someone on the ground

3-20-05

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3-20-06

For safety, how high should you place a horizontal wire antenna?

A.
Above high-voltage electrical lines
B.
Just high enough so you can easily reach it for adjustments or repairs
Correct Answer
C.
High enough so that no one can touch any part of it from the ground
D.
As close to the ground as possible

3-20-06

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3-20-07

Why should you wear a hard hat if you are on the ground helping someone work on an antenna tower?

A.
So you won't be hurt if the tower should accidentally fall
B.
To keep RF energy away from your head during antenna testing
C.
So someone passing by will know that work is being done on the tower and will stay away
Correct Answer
D.
To protect your head from something dropped from the tower

3-20-07

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3-20-08

Why should your outside antennas be high enough so that no one can touch them while you are transmitting?

A.
Touching the antenna might reflect the signal back to the transmitter and cause damage
B.
Touching the antenna might radiate harmonics
Correct Answer
C.
Touching the antenna might cause RF burns
D.
Touching the antenna might cause television interference

3-20-08

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3-20-09

Why should you make sure that no one can touch an open-wire feed line while you are transmitting with it?

A.
Because contact might break the feed line
Correct Answer
B.
Because high-voltage radio energy might burn the person
C.
Because contact might cause spurious emissions
D.
Because contact might cause a short circuit and damage the transmitter

3-20-09

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3-20-10

What safety precautions should you take before beginning repairs on an antenna?

Correct Answer
A.
Be sure to turn off the transmitter and disconnect the feed line
B.
Be sure you and the antenna structure are grounded
C.
Inform your neighbors so they are aware of your intentions
D.
Turn off the main power switch in your house

3-20-10

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3-20-11

What precaution should you take when installing a ground-mounted antenna?

A.
It should be painted so people or animals do not accidentally run into it
B.
It should not be installed in a wet area
Correct Answer
C.
It should be installed so no one can come in contact with it
D.
It should not be installed higher than you can reach

3-20-11

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