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NEW General Class Exam Question Pool

effective 7/01/2015 thru 6/30/2019

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2015-G4B: Test and monitoring equipment; two-tone test

2015-G4B01: What item of test equipment contains horizontal and vertical channel amplifiers?

An oscilloscope

An ohmmeter

A signal generator

An ammeter

2015-G4B02: Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Complex waveforms can be measured

An oscilloscope uses less power

Complex impedances can be easily measured

Input impedance is much lower

2015-G4B03: Which of the following is the best instrument to use when checking the keying waveform of a CW transmitter?

An oscilloscope

A field strength meter

A sidetone monitor

A wavemeter

2015-G4B04: What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

The attenuated RF output of the transmitter

The local oscillator of the transmitter

An external RF oscillator

The transmitter balanced mixer output

2015-G4B05: Why is high input impedance desirable for a voltmeter?

It decreases the loading on circuits being measured

It improves the frequency response

It decreases battery consumption in the meter

It improves the resolution of the readings

2015-G4B06: What is an advantage of a digital voltmeter as compared to an analog voltmeter?

Better precision for most uses

Better for measuring computer circuits

Better for RF measurements

Faster response

2015-G4B07: What signals are used to conduct a two-tone test?

Two non-harmonically related audio signals

Two audio signals of the same frequency shifted 90 degrees

Two swept frequency tones

Two audio frequency range square wave signals of equal amplitude

2015-G4B08: Which of the following instruments may be used to monitor relative RF output when making antenna and transmitter adjustments?

A field strength meter

An antenna noise bridge

A multimeter

A Q meter

2015-G4B09: Which of the following can be determined with a field strength meter?

The radiation pattern of an antenna

The radiation resistance of an antenna

The presence and amount of phase distortion of a transmitter

The presence and amount of amplitude distortion of a transmitter

2015-G4B10: Which of the following can be determined with a directional wattmeter?

Standing wave ratio

Antenna front-to-back ratio

RF interference

Radio wave propagation

2015-G4B11: Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Antenna and feed line



All of these choices are correct

2015-G4B12: What problem can occur when making measurements on an antenna system with an antenna analyzer?

Strong signals from nearby transmitters can affect the accuracy of measurements

Permanent damage to the analyzer may occur if it is operated into a high SWR

The analyzer can be damaged if measurements outside the ham bands are attempted

Connecting the analyzer to an antenna can cause it to absorb harmonics

2015-G4B13: What is a use for an antenna analyzer other than measuring the SWR of an antenna system?

Determining the impedance of an unknown or unmarked coaxial cable

Measuring the front to back ratio of an antenna

Measuring the turns ratio of a power transformer

Determining the gain of a directional antenna

2015-G4B14: What is an instance in which the use of an instrument with analog readout may be preferred over an instrument with a digital readout?

When adjusting tuned circuits

When testing logic circuits

When high precision is desired

When measuring the frequency of an oscillator

2015-G4B15: What type of transmitter performance does a two-tone test analyze?


Percentage of suppression of carrier and undesired sideband for SSB

Percentage of frequency modulation

Percentage of carrier phase shift

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2015-G4A: Station Operation and set up
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2015-G4C: Interference with consumer electronics; grounding; DSP
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