Ham Radio Exam (Level 1)

When using tactical identifiers such as "Race Headquarters" during a community service net operation, how often must your station transmit the station's FCC-assigned call sign?

At the end of each communication and every ten minutes during a communication

How fast does a radio wave travel through free space?

At the speed of light

What should be the first step to resolve cable TV interference from your ham radio transmission?

Be sure all TV coaxial connectors are installed properly

In which direction does a half-wave dipole antenna radiate the strongest signal?

Broadside to the antenna

What type of tones are used to control repeaters linked by the Internet Relay Linking Project (IRLP) protocol?

DTMF

Which of the following results from the fact that skip signals refracted from the ionosphere are elliptically polarized?

Either vertically or horizontally polarized antennas may be used for transmission or reception

Which of the following precautions should be taken when measuring circuit resistance with an ohmmeter?

Ensure that the circuit is not powered

Which of the following describes a type of antenna loading?

Inserting an inductor in the radiating portion of the antenna to make it electrically longer

What code is used when sending CW in the amateur bands?

International Morse

What health hazard is presented by electrical current flowing through the body?

It may cause involuntary muscle contractions It may disrupt the electrical functions of cells All of these choices are correct It may cause injury by heating tissue

Which of the following effects might cause radio signals to be heard despite obstructions between the transmitting and receiving stations?

Knife-edge diffraction

Which of the following displays an electrical quantity as a numeric value?

Meter

How many operator/primary station license grants may be held by any one person?

One

What type of component is often used as an adjustable volume control?

Potentiometer

What does the abbreviation "RF" refer to?

Radio frequency signals of all types

Which of the following is an accepted practice for an amateur operator who has checked into a net?

Remain on frequency without transmitting until asked to do so by the net control station.

Under what conditions is an amateur station authorized to transmit music using a phone emission?

When incidental to an authorized retransmission of manned spacecraft communication

What might be the problem if a repeater user says your transmissions are breaking up on voice peaks?

You are talking too loudly

What is the source of a high-pitched whine that varies with engine speed in a mobile transceiver's receive audio?

The alternator

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

The antenna could contact high-voltage power lines

What property of radio waves is often used to identify the different frequency bands?

The approximate wavelength

Which of the following is equal to 500 milliwatts?

0.5 watts

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

1 to 1

What is the voltage across a 2-ohm resistor if a current of 0.5 amperes flows through it?

1 volt

What is the amount of change, measured in decibels (dB), of a power increase from 20 watts to 200 watts?

10 dB

What is the voltage across a 10-ohm resistor if a current of 1 ampere flows through it?

10 volts

What is the resistance of a circuit that draws 4 amperes from a 12-volt source?

3 ohms

What is the maximum power level that an amateur radio station may use at VHF frequencies before an RF exposure evaluation is required?

50 watts PEP at the antenna

Why do most solid-state amateur radio transmitters reduce output power as SWR increases?

To protect the output amplifier transistors

Why is it important to have low SWR when using coaxial cable feed line?

To reduce signal loss

Which of the following electronic components can amplify signals?

Transistor

What class of electronic components uses a voltage or current signal to control current flow?

Transistors

Which of the following would reduce ignition interference to a receiver?

Turn on the noise blanker

What is the electrical term for the electromotive force (EMF) that causes electron flow?

Voltage

How soon after passing the examination for your first amateur radio license may you operate a transmitter on an Amateur Radio Service frequency?

As soon as your operator/station license grant appears in the FCC's license database

When is an amateur station required to transmit its assigned call sign?

At least every 10 minutes during and at the end of a communication

What is an ARQ transmission system?

A digital scheme whereby the receiving station detects errors and sends a request to the sending station to retransmit the information

What is the FCC Part 97 definition of a space station?

An amateur station located more than 50 km above the Earth's surface

Which of the following best describes Broadband-Hamnet(TM), also referred to as a high-speed multi-media network?

An amateur-radio-based data network using commercial Wi-Fi gear with modified firmware

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

An antenna analyzer

What are the names of the two electrodes of a diode?

Anode and cathode

What term describes the use of a sub-audible tone transmitted along with normal voice audio to open the squelch of a receiver?

CTCSS

Which of the following is combined with an inductor to make a tuned circuit?

Capacitor

What may occur if data signals arrive via multiple paths?

Error rates are likely to increase

What does the term "traffic" refer to in net operation?

Formal messages exchanged by net stations

From which of the following locations may an FCC-licensed amateur station transmit?

From any vessel or craft located in international waters and documented or registered in the United States

What electrical parameter is controlled by a potentiometer?

Resistance

What is an appropriate way to call another station on a repeater if you know the other station's call sign?

Say the station's call sign, then identify with your call sign

Which term describes the ability of a receiver to detect the presence of a signal?

Sensitivity

Which of the following is an acceptable language to use for station identification when operating in a phone sub-band?

The English language

Which of the following restrictions apply when a non-licensed person is allowed to speak to a foreign station using a station under the control of a Technician class control operator?

The foreign station must be one with which the U.S. has a thirdparty agreement

What is the gain of an antenna?

The increase in signal strength in a specified direction when compared to a reference antenna

What information is contained in the preamble of a formal traffic message?

The information needed to track the message

In general, what happens as the frequency of a signal passing through coaxial cable is increased?

The loss increases

What is meant by the statement that a satellite is operating in mode U/V?

The satellite uplink is in the 70 centimeter band and the downlink is in the 2 meter band

How is a computer's sound card used when conducting digital communications?

The sound card provides audio to the radio's microphone input and converts received audio to digital form

Which of the following are provided by satellite tracking programs?

The time, azimuth, and elevation of the start, maximum altitude, and end of a pass All of these choices are correct Maps showing the real-time position of the satellite track over the earth The apparent frequency of the satellite transmission, including effects of Doppler shift

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

They are commonly used at HF frequencies

What is meant by the term "check," in reference to a formal traffic message?

he number of words or word equivalents in the text portion of the message

What is component 9 in figure T2?

variable resistor