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Ham Radio > Trouble Questions > Flashcards

Trouble Questions Flashcards

1
Q

What is meant by the statement: The satellite is operating in U/V mode?

A

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

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2
Q

Which of the following can reduce overload of a VHF transceiver by a nearby commercial FM station?

A

Installing a band rejected filter

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3
Q

What is the maximum peak envelope power output for Technician class operators in their HF band segments.?

A

200 watts

Peak Envelope Power (PEP)
HF is two letters…think two letters….200 watts

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4
Q

When may amateur stations transmit information in support of broadcasting, assuming no other means are necessary?

A

When such communications are directly related to the safety of human life or protection of property.

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5
Q

Why do VHF signal strengths sometimes vary greatly when the antenna is moved only a few feet?

A

Multi-path propagation cancels or reinforces signals.

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6
Q

In which type of circuit is voltage the same across all components?

A

Parallel

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7
Q

When can a tech-class licensee be the control operator of a station operating in an exclusive Amateur Extra class operator segment of the amateur bands?

A

At no time

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8
Q

How can fundamental overload of a non-amateur radio or tv receiver by an amateur signal be reduced or eliminated?

A

Switch the transmitter to a narrow band mode

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9
Q

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

A

Capacitor

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10
Q

When configured to measure CURRENT, how is a multimeter connected to a component?

A

In series

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11
Q

How is a voltmeter connected to a component to measure APPLIED VOLTAGE?

A

In parallel

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12
Q

What is a LEO satellite?

A

A satellite in Low Earth Orbit (LEO)

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13
Q

What formula is used to calculate Resistance in a circuit?

A

R (Resistance) = E (voltage) / I (Current)

R = E / I

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14
Q

How do you calculate wavelength?

A

300 divided by frequency in megahertz.

If you do the math for 28.5 MHz, you will see it comes out to 10.5 something, indicating this frequency is inside the 10-meter band.

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15
Q

What is voltage?

A

The electromotive force that causes electrons to flow.

Voltage is measured in VOLTS.

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16
Q

What is current?

A

The flow of electrical charge; it’s the movement of electrons.

Electrical current is measured in AMPERES.

17
Q

What is resistance?

A

The property that resists the flow of current.

Resistance is measured in OHMS.

Resistance opposes the flow of Alternating Current (AC), Direct Current (DC), and RF Current.

18
Q

What is power?

A

The rate at which electrical energy is used.

Power is measured in watts.

19
Q

What is capacitance?

A

Capacitance is the ability to store energy in an ELECTRIC field.

Its measured in farads.

The component in a circuit for this is a capacitor.

20
Q

What is inductance?

A

The ability to store energy in a MAGNETIC field.

The unit of measure is the henry.

The component for this in an electric circuit is called an inductor.

21
Q

What describes the number of times per second an alternating current makes a complete cycle?

A

Frequency

22
Q

What electrical component stores energy in a magnetic field?

A

Diode

23
Q

What is the frequency range of the 6 meter band.

A

50 to 54 MHz

24
Q

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

A 
Ohms Law: 
VOLTAGE equals CURRENT multiplied by RESISTANCE 
-Volts (E)
-Current (I)                   
-Resistance (R)

E = 1 x 10
Answer: 10 Volts

25
Q

What is the proper grounding technique for a tower.

A

Separate 8ft long ground rods for each tower leg bonded to the tower and each other.

26
Q

What type of transistor has a gate, drain, and source?

A

Field Effect

27
Q

What is a relay?

A

An electrically controlled switch

28
Q

Which decible value most closely represents a power increase from 5 watts to 10 watts?

A. 2 dB

B. 3 dB

C. 5 dB

D. 10 dB

A

B. 3 dB

Note:
Every 3 dB of gain multiplies your signal by 2.

Every 3 db dB of loss divides your signal by 2.

29
Q

How is a volt meter connected to a component to measure applied voltage?

A. In Series

B. In Parallel

C. In Quadrature

D. In Phase

A

B. In Parallel

30
Q

What is the approximate bandwidth of a VHF repeater phone signal?

A. Less than 500Hz

B. About 150kHz

C. Between 10 and 15kHz

D. Between 50 and 125kHz

A

C. Between 10 and 15kHz

31
Q

What is impedance?

A

The opposition to AC current flow

32
Q

Which of the following are 12 volt battery storage hazards?

A. Electrical Shock

B. Burns, fire, explosion.

C. RF emissions from nearby transmitter can cause them to emit poison gas.

D. All of the above

A

D. All of the above

33
Q

What device converts RF input and output of a transceiver into another band.

A. High pass filter

B. Low pass filter

C. Transverter

D. Phase converter

A

C. Transverter

34
Q

Which frequency is in the 6 meter band?

A. 49.00 MHz

B. 52.525 MHz

C. 28.52 MHz

D. 222.15 MHz

A

B. 52.525 MHz

6 meter band is 50 - 54 MHz

35
Q

What type of circuit controls the amount of voltage from a power supply?

A. Regulator

B. Oscillator

C. Filter

D. Phase Inverter

A

A. Regulator

36
Q

What is FT8?

A. A wide band voice band

B. A digital mode capable of low signal to noise operation

C. An eight channel multi mode for FM repeaters

D. Slow scan tv mode

A

B. A digital mode capable of low signal to noise operation

37
Q

Which of the following describes DMR?

A. A technique for time multiplexing two digital voice signals on a single 12.5 kHz repeater channel.

B.

A

A. A technique for time multiplexing two digital voice signals on a single 12.5 kHz repeater channel.

Ham Radio (11 decks)

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