Term
| T0A01 Which is a commonly accepted value for the lowest voltage that can cause a dangerous electric shock? |
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Definition
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Term
| T0A02 How does current flowing through the body cause a health hazard? |
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Definition
| By heating tissue AND It disrupts the electrical functions of cells AND It causes involuntary muscle contractions AND All of these choices are correct |
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Term
| T0A03 What is connected to the green wire in a three-wire electrical AC plug? |
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Definition
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Term
| T0A04 What is the purpose of a fuse in an electrical circuit? |
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Definition
| To interrupt power in case of overload |
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Term
| T0A05 Why is it unwise to install a 20-ampere fuse in the place of a 5-ampere fuse? |
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Definition
| Excessive current could cause a fire |
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Term
| T0A06 What is a good way to guard against electrical shock at your station? |
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Definition
| Use three-wire cords and plugs for all AC powered equipment AND Connect all AC powered station equipment to a common safety ground AND Use a circuit protected by a ground-fault interrupter AND All of these choices are correct |
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Term
| T0A07 Which of these precautions should be taken when installing devices for lightning protection in a coaxial cable feedline? |
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Definition
| Ground all of the protectors to a common plate which is in turn connected to an external ground |
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Term
| T0A08 What is one way to recharge a 12-volt lead-acid station battery if the commercial power is out? |
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Definition
| Connect the battery to a car's battery and run the engine |
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Term
| T0A09 What kind of hazard is presented by a conventional 12-volt storage battery? |
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Definition
| Explosive gas can collect if not properly vented |
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Term
| T0A10 What can happen if a lead-acid storage battery is charged or discharged too quickly? |
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Definition
| The battery could overheat and give off flammable gas or explode |
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Term
| T0A11 Which of the following is good practice when installing ground wires on a tower for lightning protection? |
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Definition
| Ensure that connections are short and direct |
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Term
| T0A12 What kind of hazard might exist in a power supply when it is turned off and disconnected? |
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Definition
| You might receive an electric shock from stored charge in large capacitors |
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Term
| T0A13 What safety equipment should always be included in home-built equipment that is powered from 120V AC power circuits? |
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Definition
| A fuse or circuit breaker in series with the AC "hot" conductor |
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Term
| T0B01 When should members of a tower work team wear a hard hat and safety glasses? |
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Definition
| At all times when any work is being done on the tower |
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Term
| T0B02 What is a good precaution to observe before climbing an antenna tower? |
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Definition
| Put on a climbing harness and safety glasses |
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Term
| T0B03 Under what circumstances is it safe to climb a tower without a helper or observer? |
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Definition
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Term
| T0B04 Which of the following is an important safety precaution to observe when putting up an antenna tower? |
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Definition
| Look for and stay clear of any overhead electrical wires |
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Term
| T0B05 What is the purpose of a gin pole? |
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Definition
| To lift tower sections or antennas |
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Term
| T0B06 What is the minimum safe distance from a power line to allow when installing an antenna? |
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Definition
| So that if the antenna falls unexpectedly, no part of it can come closer than 10 feet to the power wires |
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Term
| T0B07 Which of the following is an important safety rule to remember when using a crank-up tower? |
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Definition
| This type of tower must never be climbed unless it is in the fully retracted position |
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Term
| T0B08 What is considered to be a proper grounding method for a tower? |
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Definition
| Separate eight-foot long ground rods for each tower leg, bonded to the tower and each other |
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Term
| T0B10 Which of the following is true concerning grounding conductors used for lightning protection? |
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Definition
| Sharp bends must be avoided |
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Term
| T0B11 Which of the following establishes grounding requirements for an amateur radio tower or antenna? |
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Definition
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Term
| T0C01 What type of radiation are VHF and UHF radio signals? |
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Definition
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Term
| T0C02 Which of the following frequencies has the lowest Maximum Permissible Exposure limit? |
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Definition
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Term
| T0C03 What is the maximum power level that an amateur radio station may use at VHF frequencies before an RF exposure evaluation is required? |
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Definition
| 50 watts PEP at the antenna |
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Term
| T0C04 What factors affect the RF exposure of people near an amateur station antenna? |
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Definition
| Frequency and power level of the RF field AND Distance from the antenna to a person AND Radiation pattern of the antenna AND All of these choices are correct |
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Term
| T0C05 Why do exposure limits vary with frequency |
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Definition
| ?The human body absorbs more RF energy at some frequencies than at others |
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Term
| T0C06 Which of the following is an acceptable method to determine that your station complies with FCC RF exposure regulations? |
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Definition
| By calculation based on FCC OET Bulletin 65 AND By calculation based on computer modeling AND By measurement of field strength using calibrated equipment AND All of these choices are correct |
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Term
| T0C07 What could happen if a person accidentally touched your antenna while you were transmitting |
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Definition
| ?They might receive a painful RF burn |
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Term
| T0C08 Which of the following actions might amateur operators take to prevent exposure to RF radiation in excess of FCC-supplied limits? |
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Definition
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Term
| T0C09 How can you make sure your station stays in compliance with RF safety regulations? |
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Definition
| By re-evaluating the station whenever an item of equipment is changed |
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Term
| T0C10 Why is duty cycle one of the factors used to determine safe RF radiation exposure levels? |
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Definition
| It affects the average exposure of people to radiation |
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Term
| T0C11 What is meant by "duty cycle" when referring to RF exposure? |
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Definition
| The ratio of on-air time to total operating time of a transmitted signal |
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