Which of the following connectors should be carefully taped for weather protection when used outdoors?

1. A PL259
2. B BNC
3. C Type N
4. D All these choices are correct

What is the most common impedance of coaxial cables used in amateur radio?

1. A 8 ohms
2. B 50 ohms
3. C 600 ohms
4. D 12 ohms

Why is coaxial cable the most common feed line for amateur radio antenna systems?

1. A It is easy to use and requires few special installation considerations
2. B It has less loss than any other type of feed line
3. C It can handle more power than any other type of feed line
4. D It is less expensive than any other type of feed line

What is the major function of an antenna tuner (antenna coupler)?

1. A It matches the antenna system impedance to the transceiver's output impedance
2. B It helps a receiver automatically tune in weak stations
3. C It allows an antenna to be used on both transmit and receive
4. D It automatically selects the proper antenna for the frequency band being used

What happens as the frequency of a signal in coaxial cable is increased?

1. A The characteristic impedance decreases
2. B The loss decreases
3. C The characteristic impedance increases
4. D The loss increases

Which of the following connector types is most suitable as an RF connector for frequencies above 400 MHz?

1. A PL-259
2. B Type N
3. C RS-213
4. D DB-25

Which of the following is true of PL-259 type coax connectors?

1. A They are preferred for microwave operation
2. B They are watertight
3. C They are commonly used at HF and VHF frequencies
4. D They are a bayonet-type connector

Which of the following is a source of loss in coaxial feed line?

1. A Water intrusion into coaxial connectors
2. B High SWR
3. C Multiple connectors in the line
4. D All these choices are correct

What can cause erratic changes in SWR?

1. A Local thunderstorm
2. B Loose connection in the antenna or feed line
3. C Over-modulation
4. D Overload from a strong local station

What is the electrical difference between RG-58 and RG-213 coaxial cable?

1. A There is no significant difference between the two types
2. B RG-58 cable has two shields
3. C RG-213 cable has less loss at a given frequency
4. D RG-58 cable can handle higher power levels

Which of the following types of feed line has the lowest loss?

1. A 50-ohm flexible coax
2. B Multi-conductor unbalanced cable
3. C Air-insulated hardline
4. D 75-ohm flexible coax

What is standing wave ratio (SWR)?

1. A A measure of how well a load is matched to a transmission line
2. B The ratio of amplifier power output to input
3. C The transmitter efficiency ratio
4. D An indication of the quality of your station's ground connection