What is the primary purpose of a dummy load?

1. A To prevent transmitting signals over the air when making tests
2. B To prevent over-modulation of a transmitter
3. C To improve the efficiency of an antenna
4. D To improve the signal-to-noise ratio of a receiver

Which of the following is used to determine if an antenna is resonant at the desired operating frequency?

1. A A VTVM
2. B An antenna analyzer
3. C A Q meter
4. D A frequency counter

What does a typical RF dummy load consist of?

1. A A low-voltage power supply and an AC relay
2. B A 50-ohm non-inductive resistor mounted on a heat sink
3. C A low-voltage power supply and a DC relay
4. D A 50-ohm inductive reactance mounted in a shielded enclosure

What reading on an SWR meter indicates a perfect impedance match between the antenna and the feed line?

1. A 50:50
2. B Zero
3. C 1:1
4. D Full Scale

Why do most solid-state transmitters reduce output power as SWR increases beyond a certain level?

1. A To protect the RF output amplifier transistors
2. B To comply with FCC rules on spectral purity
3. C Because power supplies cannot supply enough current at high SWR
4. D To lower the SWR on the transmission line

What does an SWR reading of 4:1 indicate?

1. A Loss of -4 dB
2. B Good impedance match
3. C Gain of +4 dB
4. D Impedance mismatch

What happens to power lost in a feed line?

1. A It increases the SWR
2. B It is radiated as harmonics
3. C It is converted into heat
4. D It distorts the signal

Which instrument can be used to determine SWR?

1. A Voltmeter
2. B Ohmmeter
3. C Iambic pentameter
4. D Directional wattmeter

Which of the following causes failure of coaxial cables?

1. A Moisture contamination
2. B Solder flux contamination
3. C Rapid fluctuation in transmitter output power
4. D Operation at 100% duty cycle for an extended period

Why should the outer jacket of coaxial cable be resistant to ultraviolet light?

1. A Ultraviolet light can increase the resistance of the conductors
2. B Ultraviolet light can increase losses in the cable's jacket
3. C Ultraviolet and RF signals can mix, causing interference
4. D Ultraviolet light can damage the jacket and allow water to enter the cable

What is an advantage of foam-dielectric versus solid-dielectric coaxial cable?

1. A It is more resistant to moisture contamination
2. B It has higher voltage breakdown
3. C It has less loss per foot
4. D It has a better impedance match to 50 ohms