Canadian Basic pool, section 3-19

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Subelement 3

Station Assembly, Practice and Safety

Section 3-19

electrical safety ground, capacitor discharge, fuse replacement

3-19-01

For best protection from electrical shock, what should be grounded in an amateur station?

A.
The antenna feed line
Correct Answer
B.
All station equipment
C.
The AC power line
D.
The power supply primary

3-19-01

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3-19-02

If a separate ground system is not possible for your amateur station, an alternative indoor grounding point could be:

Correct Answer
A.
a metallic cold water pipe
B.
a plastic cold water pipe
C.
a window screen
D.
a metallic natural gas pipe

3-19-02

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3-19-03

To protect you against electrical shock, the chassis of each piece of your station equipment should be connected to:

Correct Answer
A.
a good ground connection
B.
a dummy load
C.
insulated shock mounts
D.
the antenna

3-19-03

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3-19-04

Which of these materials is best for a ground rod driven into the earth?

A.
Hard plastic
B.
Iron or steel
C.
Fiberglass
Correct Answer
D.
Copper-clad steel

3-19-04

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3-19-06

Where should the green wire in a threewire AC line cord be connected in a power supply?

A.
To the white wire
B.
To the "hot" side of the power switch
Correct Answer
C.
To the chassis
D.
To the fuse

3-19-06

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3-19-07

If your third-floor amateur station has a ground wire running 10.05 metres (33 feet) down to a ground rod, why might you get an RF burn if you touch the front panel of your HF transceiver?

A.
Because of a bad antenna connection, allowing the RF energy to take an easier path out of the transceiver through you
B.
Because the transceiver's heat-sensing circuit is not working to start the cooling fan
Correct Answer
C.
Because the ground wire is a resonant length on several HF bands and acts more like an antenna than an RF ground connection
D.
Because the ground rod is not making good contact with moist earth

3-19-07

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3-19-08

What is one good way to avoid stray RF energy in your amateur station?

A.
Make a couple of loops in the ground wire where it connects to your station
B.
Drive the ground rod at least 420 cm (14 feet) into the ground
Correct Answer
C.
Keep the station's ground wire as short as possible
D.
Use a beryllium ground wire for best conductivity

3-19-08

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3-19-09

Which statement about station grounding is true?

A.
A ground loop is an effective way to ground station equipment
B.
If the chassis of all station equipment is connected with a good conductor, there is no need to tie them to an earth ground
Correct Answer
C.
RF hot spots can occur in a station located above the ground floor if the equipment is grounded by a long ground wire
D.
The chassis of each piece of station equipment should be tied together with high- impedance conductors

3-19-09

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3-19-10

On mains operated power supplies, the ground wire should be connected to the metal chassis of the power supply. This ensures, in case there is a fault in the power supply, that the chassis:

A.
does not become conductive to prevent electric shock
B.
becomes conductive to prevent electric shock
C.
develops a high voltage compared to the ground
Correct Answer
D.
does not develop a high voltage with respect to the ground

3-19-10

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3-19-11

The purpose of using a three- wire power cord and plug on amateur radio equipment is to:

A.
prevent the plug from being reversed in the wall outlet
Correct Answer
B.
prevent the chassis from becoming live in case of an internal short to the chassis
C.
prevent short circuits
D.
make it inconvenient to use

3-19-11

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