Safety Procedures & Risk Management Flashcards
7 cards from real Ham Radio Technician Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Safety Procedures & Risk Management flashcards as text
What is the significance of the 6-minute averaging time used in FCC RF exposure evaluations?
Answer: It reflects the thermal time constant of human tissue for heating effects
The 6-minute average accounts for the rate at which biological tissue absorbs and dissipates RF heat, matching human thermal response.
Why should coaxial cable shields never be used as the sole safety ground for RF equipment?
Answer: Coax shields are not rated for the fault currents that occur during a lightning strike or AC line fault
Coax shields have limited current-carrying capacity and are not designed to safely conduct large fault or lightning surge currents.
What action should you take if you notice that the insulation on a power cord supplying your transceiver is cracked or frayed?
Answer: Stop using the equipment and replace the cord before further operation
Damaged insulation is an immediate shock and fire hazard; the equipment must not be used until the cord is replaced.
When using a handheld transceiver with a rubber duck antenna, how should you hold it to minimize RF exposure to your head?
Answer: Keep the antenna vertical and hold the radio away from your face while transmitting
Holding the radio upright with the antenna away from your head reduces the amount of RF your tissue absorbs during transmission.
What is the primary purpose of a GFCI (Ground Fault Circuit Interrupter) outlet in an amateur radio station?
Answer: To quickly disconnect power if current flows through an unintended path such as a person
A GFCI detects even small ground-fault currents and trips within milliseconds, preventing electrocution.
Which of the following antenna locations would create the greatest RF exposure concern for an operator in their shack directly below?
Answer: A vertical antenna mounted at ground level 3 feet from the shack window
A ground-level antenna just a few feet from the operating position results in the highest RF field strength at the operator's location.
What should you do if you feel a tingling sensation while touching radio equipment that is plugged in?
Answer: Stop touching the equipment immediately and have an electrician check for a ground fault
Tingling indicates current is flowing through your body, signaling a ground fault or wiring defect that must be corrected before further use.