Safety, Grounding & RF Exposure Flashcards
6 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 6 Safety, Grounding & RF Exposure flashcards as text
What does the FCC require amateur stations to perform regarding RF exposure?
Answer: A routine station evaluation to ensure RF exposure limits are not exceeded
The FCC requires amateur radio operators to perform a routine RF exposure evaluation whenever their station setup changes to confirm they are operating within safe exposure limits.
What is the safe way to discharge a high-voltage capacitor in a tube amplifier?
Answer: Use a bleeder resistor or a discharge tool, never short it directly with a screwdriver
A bleeder resistor or purpose-made discharge tool safely drains the stored charge; shorting a large capacitor with a screwdriver can cause a dangerous arc and equipment damage.
Why should you never operate a transmitter with the cabinet open and RF finals exposed?
Answer: Dangerous voltages may be present and RF radiation near the finals can be well above MPE limits
Open amplifier cabinets expose operators to potentially lethal high voltages and to intense near-field RF radiation that can exceed safe exposure limits at close range.
What is the purpose of bonding all metal objects in a shack together?
Answer: To keep all metallic objects at the same electrical potential, reducing shock and interference hazards
Bonding equalizes the voltage potential across all metal objects in the shack, which reduces the risk of electric shock and minimizes RF ground loop interference.
Which of the following actions reduces RF exposure to the operator the most effectively?
Answer: Increasing the distance between the operator and the antenna
RF exposure decreases with the square of the distance from the antenna, so simply moving farther from the antenna is the most effective way to reduce exposure.
What electrical safety risk is associated with using a power supply that lacks a fuse or circuit breaker?
Answer: An unprotected overcurrent condition can cause wiring to overheat and start a fire
Without a fuse or breaker, an overcurrent fault can overheat wiring insulation and cause a fire before any automatic protection interrupts the circuit.