WorksheetsHam Radio General Questions Till 2019 Set GOB
Total questions: 15
Worksheet time: 15mins
Name
Class
Date
1.
G0B01 Which wire or wires in a four-conductor connection should be attached to fuses or circuit breakers in a device operated from a 240 VAC single phase source?
a)
A. Only the two wires carrying voltage
b)
B. Only the neutral wire
c)
C. Only the ground wire
d)
D. All wires
2.
G0B02 What is the minimum wire size that may be safely used for a circuit that draws up to 20 amperes of continuous current?
a)
A. AWG number 20
b)
B. AWG number 16
c)
C. AWG number 12
d)
D. AWG number 8
3.
G0B03 Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?
a)
A. 100 amperes
b)
B. 60 amperes
c)
C. 30 amperes
d)
D. 15 amperes
4.
G0B04 Which of the following is a primary reason for not placing a gasoline-fueled generator inside an occupied area?
a)
A. Danger of carbon monoxide poisoning
b)
B. Danger of engine over torque
c)
C. Lack of oxygen for adequate combustion
d)
D. Lack of nitrogen for adequate combustion
5.
G0B05 Which of the following conditions will cause a Ground Fault Circuit Interrupter (GFCI) to disconnect the 120 or 240 Volt AC line power to a device?
a)
A. Current flowing from one or more of the voltage-carrying wires to the neutral wire
b)
B. Current flowing from one or more of the voltage-carrying wires directly to ground
c)
C. Overvoltage on the voltage-carrying wires
d)
D. All of these choices are correct
6.
G0B06 Why must the metal enclosure of every item of station equipment be grounded?
a)
A. It prevents a blown fuse in the event of an internal short circuit
b)
B. It prevents signal overload
c)
C. It ensures that the neutral wire is grounded
d)
D. It ensures that hazardous voltages cannot appear on the chassis
7.
G0B07 Which of these choices should be observed when climbing a tower using a safety belt or harness?
a)
A. Never lean back and rely on the belt alone to support your weight
b)
B. Confirm that the belt is rated for the weight of the climber and that it is within its allowable service life
c)
C. Ensure that all heavy tools are securely fastened to the belt D-ring
d)
D. All of these choices are correct
8.
G0B08 What should be done by any person preparing to climb a tower that supports electrically powered devices?
a)
A. Notify the electric company that a person will be working on the tower
b)
B. Make sure all circuits that supply power to the tower are locked out and tagged
c)
C. Unground the base of the tower
d)
D. All of these choices are correct
9.
G0B09 Why should soldered joints not be used with the wires that connect the base of a tower to a system of ground rods?
a)
A. The resistance of solder is too high
b)
B. Solder flux will prevent a low conductivity connection
c)
C. Solder has too high a dielectric constant to provide adequate lightning protection
d)
D. A soldered joint will likely be destroyed by the heat of a lightning strike
10.
G0B10 Which of the following is a danger from lead-tin solder?
a)
A. Lead can contaminate food if hands are not washed carefully after handling the solder
b)
B. High voltages can cause lead-tin solder to disintegrate suddenly
c)
C. Tin in the solder can "cold flow" causing shorts in the circuit
d)
D. RF energy can convert the lead into a poisonous gas
11.
G0B11 Which of the following is good practice for lightning protection grounds?
a)
A. They must be bonded to all buried water and gas lines
b)
B. Bends in ground wires must be made as close as possible to a right angle
c)
C. Lightning grounds must be connected to all ungrounded wiring
d)
D. They must be bonded together with all other grounds
12.
G0B12 What is the purpose of a power supply interlock?
a)
A. To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty
b)
B. To shut down the unit if it becomes too hot
c)
C. To ensure that dangerous voltages are removed if the cabinet is opened
d)
D. To shut off the power supply if too much voltage is produced
13.
G0B13 What must you do when powering your house from an emergency generator?
a)
A. Disconnect the incoming utility power feed
b)
B. Insure that the generator is not grounded
c)
C. Insure that all lightning grounds are disconnected
d)
D. All of these choices are correct
14.
G0B14 Which of the following is covered by the National Electrical Code?
a)
A. Acceptable bandwidth limits
b)
B. Acceptable modulation limits
c)
C. Electrical safety inside the ham shack
d)
D. RF exposure limits of the human body
15.
G0B15 Which of the following is true of an emergency generator installation?
a)
A. The generator should be located in a well-ventilated area
b)
B. The generator must be insulated from ground
c)
C. Fuel should be stored near the generator for rapid refueling in case of an emergency
d)
D. All of these choices are correct
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