Ham Radio Technician Class Exam | Question Pool with Answers (100% Correct)

Ham Radio Technician Class Exam | Question Pool with Answers (100% Correct) Ham Radio Technician Class Exam | Question Pool with Answers (100% Correct) T0A01 Which is a commonly accepted value for the lowest voltage that can cause a dangerous electric shock? A. 12 volts B. 30 volts C. 120 volts D. 300 volts - ANSWER - (B) T0A02 How does current flowing through the body cause a health hazard? A. By heating tissue B. It disrupts the electrical functions of cells C. It causes involuntary muscle contractions D. All of these choices are correct - ANSWER - (D) T0A03 What is connected to the green wire in a three-wire electrical AC plug? A. Neutral B. Hot C. Safety ground D. The white wire - ANSWER - (C) T0A04 What is the purpose of a fuse in an electrical circuit? A. To prevent power supply ripple from damaging a circuit B. To interrupt power in case of overload C. To limit current to prevent shocks D. All of these choices are correct - ANSWER - (B) T0A05 Why is it unwise to install a 20-ampere fuse in the place of a 5-ampere fuse? A. The larger fuse would be likely to blow because it is rated for higher current B. The power supply ripple would greatly increase C. Excessive current could cause a fire D. All of these choices are correct - ANSWER - (C) T0A06 What is a good way to guard against electrical shock at your station? A. Use three-wire cords and plugs for all AC powered equipment B. Connect all AC powered station equipment to a common safety ground C. Use a circuit protected by a ground-fault interrupter D. All of these choices are correct - ANSWER - (D) T0A07 Which of these precautions should be taken when installing devices for lightning protection in a coaxial cable feedline? A. Include a parallel bypass switch for each protector so that it can be switched out of the circuit when running high power B. Include a series switch in the ground line of each protector to prevent RF overload from inadvertently damaging the protector C. Keep the ground wires from each protector separate and connected to station ground D. Ground all of the protectors to a common plate which is in turn connected to an external ground - ANSWER - (D) T0A08 What is one way to recharge a 12-volt lead-acid station battery if the commercial power is out? A. Cool the battery in ice for several hours B. Add acid to the battery C. Connect the battery to a car's battery and run the engine D. All of these choices are correct - ANSWER - (C) T0A09 What kind of hazard is presented by a conventional 12-volt storage battery? A. It emits ozone which can be harmful to the atmosphere B. Shock hazard due to high voltage C. Explosive gas can collect if not properly vented D. All of these choices are correct - ANSWER - (C)