Checkpoint: T0B — HAM Trainer

T0B01 Which of the following is good practice when installing ground wires on a tower for lightning protection?

A Put a drip loop in the ground connection to prevent water damage to the ground system B Make sure all ground wire bends are right angles C Ensure that connections are short and direct D All these choices are correct

T0B02 What is required when climbing an antenna tower?

A Have sufficient training on safe tower climbing techniques B Use appropriate tie-off to the tower at all times C Always wear an approved climbing harness D All these choices are correct

T0B03 Under what circumstances is it safe to climb a tower without a helper or observer?

A When no electrical work is being performed B When no mechanical work is being performed C When the work being done is not more than 20 feet above the ground D Never

T0B04 Which of the following is an important safety precaution to observe when putting up an antenna tower?

A Wear a ground strap connected to your wrist at all times B Insulate the base of the tower to avoid lightning strikes C Look for and stay clear of any overhead electrical wires D All these choices are correct

T0B05 What is the purpose of a safety wire through a turnbuckle used to tension guy lines?

A Secure the guy line if the turnbuckle breaks B Prevent loosening of the turnbuckle from vibration C Provide a ground path for lightning strikes D Provide an ability to measure for proper tensioning

T0B06 What is the minimum safe distance from a power line to allow when installing an antenna?

A Add the height of the antenna to the height of the power line and multiply by a factor of 1.5 B The height of the power line above ground C 1/2 wavelength at the operating frequency D Enough so that if the antenna falls, no part of it can come within 10 feet of the power wires

T0B07 Which of the following is an important safety rule to remember when using a crank-up tower?

A This type of tower must never be painted B This type of tower must never be grounded C This type of tower must not be climbed unless it is retracted, or mechanical safety locking devices have been installed D All these choices are correct

T0B08 Which is a proper grounding method for a tower?

A A single four-foot ground rod, driven into the ground no more than 12 inches from the base B A ferrite-core RF choke connected between the tower and ground C A connection between the tower base and a cold-water pipe D Separate eight-foot ground rods for each tower leg, bonded to the tower and each other

T0B09 Why should you avoid attaching an antenna to a utility pole?

A The antenna will not work properly because of induced voltages B The antenna may unbalance the power transformer, causing power fluctuations C The antenna could contact high-voltage power lines D All these choices are correct

T0B10 Which of the following is true when installing grounding conductors used for lightning protection?

A Use only non-insulated wire B Wires must be carefully routed with precise right-angle bends C Sharp bends must be avoided D Common grounds must be avoided

T0B11 Which of the following establishes grounding requirements for an amateur radio tower or antenna?

A FCC Part 97 rules B Local electrical codes C FAA tower lighting regulations D UL recommended practices