WorksheetsT7_Practical_Circuits_part_1
Total questions: 22
Worksheet time: 4hrs 40mins
Name
Class
Date
1.
Which term describes the ability of a receiver to detect the presence of a signal?
a)
Linearity
b)
Sensitivity
c)
Sensitivity
d)
Total Harmonic Distortion
2.
What is a transceiver?
a)
A device that combines a receiver and transmitter
b)
A device for matching feed line impedance to 50 ohms
c)
A device for automatically sending and decoding Morse code
d)
A device for converting receiver and transmitter frequencies to another band
3.
Which of the following is used to convert a signal from one frequency to another?
a)
Phase splitter
b)
Mixer
c)
Inverter
d)
Amplifier
4.
Which term describes the ability of a receiver to discriminate between multiple signals?
a)
Discrimination ratio
b)
Sensitivity
c)
Selectivity
d)
Harmonic distortion
5.
What is the name of a circuit that generates a signal at a specific frequency?
a)
Reactance modulator
b)
Phase modulator
c)
Low-pass filter
d)
Oscillator
6.
What device converts the RF input and output of a transceiver to another band?
a)
High-pass filter
b)
Low-pass filter
c)
Transverter
d)
Phase converter
7.
What is the function of a transceiver’s PTT input?
a)
Input for a key used to send CW
b)
Switches transceiver from receive to transmit when grounded
c)
Provides a transmit tuning tone when grounded
d)
Input for a preamplifier tuning tone
8.
Which of the following describes combining speech with an RF carrier signal?
a)
Impedance matching
b)
Oscillation
c)
Modulation
d)
Low-pass filtering
9.
What is the function of the SSB/CW-FM switch on a VHF power amplifier?
a)
Change the mode of the transmitted signal
b)
Set the amplifier for proper operation in the selected mode
c)
Change the frequency range of the amplifier to operate in the proper segment of the band
d)
Reduce the received signal noise
10.
What device increases the transmitted output power from a transceiver?
a)
A voltage divider
b)
An RF power amplifier
c)
An impedance network
d)
All these choices are correct
11.
Where is an RF preamplifier installed?
a)
Between the antenna and receiver
b)
At the output of the transmitter power amplifier
c)
Between the transmitter and the antenna tuner
d)
At the output of the receiver audio amplifier
12.
What can you do if you are told your FM handheld or mobile transceiver is over-deviating?
a)
Talk louder into the microphone
b)
Let the transceiver cool off
c)
Change to a higher power level
d)
Talk farther away from the microphone
13.
What would cause a broadcast AM or FM radio to receive an amateur radio transmission unintentionally?
a)
The receiver is unable to reject strong signals outside the AM or FM band
b)
The microphone gain of the transmitter is turned up too high
c)
The audio amplifier of the transmitter is overloaded
d)
The deviation of an FM transmitter is set too low
14.
Which of the following can cause radio frequency interference?
a)
Fundamental overload
b)
Harmonics
c)
Spurious emissions
d)
All these choices are correct
15.
Which of the following could you use to cure distorted audio caused by RF current on the shield of a microphone cable?
a)
Band-pass filter
b)
Low-pass filter
c)
Preamplifier
d)
Ferrite choke
16.
How can fundamental overload of a non-amateur radio or TV receiver by an amateur signal be reduced or eliminated?
a)
Block the amateur signal with a filter at the antenna input of the affected receiver
b)
Block the interfering signal with a filter on the amateur transmitter
c)
Switch the transmitter from FM to SSB
d)
Switch the transmitter to a narrow-band mode
17.
Which of the following actions should you take if a neighbor tells you that your station’s transmissions are interfering with their radio or TV reception?
a)
Make sure that your station is functioning properly and that it does not cause interference to your own radio or television when it is tuned to the same channel
b)
Immediately turn off your transmitter and contact the nearest FCC office for assistance
c)
Install a harmonic doubler on the output of your transmitter and tune it until the interference is eliminated
d)
All these choices are correct
18.
Which of the following can reduce overload of a VHF transceiver by a nearby commercial FM station?
a)
Installing an RF preamplifier
b)
Using double-shielded coaxial cable
c)
Installing bypass capacitors on the microphone cable
d)
Installing a band-reject filter
19.
What should you do if something in a neighbor’s home is causing harmful interference to your amateur station?
a)
Work with your neighbor to identify the offending device
b)
Politely inform your neighbor that FCC rules prohibit the use of devices that cause interference
c)
Make sure your station meets the standards of good amateur practice
d)
All these choices are correct
20.
What should be the first step to resolve non-fiber optic cable TV interference caused by your amateur radio transmission?
a)
Add a low-pass filter to the TV antenna input
b)
Add a high-pass filter to the TV antenna input
c)
Add a preamplifier to the TV antenna input
d)
Be sure all TV feed line coaxial connectors are installed properly
21.
What might be a problem if you receive a report that your audio signal through an FM repeater is distorted or unintelligible?
a)
Your transmitter is slightly off frequency
b)
Your batteries are running low
c)
You are in a bad location
d)
All these choices are correct
22.
What is a symptom of RF feedback in a transmitter or transceiver?
a)
Excessive SWR at the antenna connection
b)
The transmitter will not stay on the desired frequency
c)
Reports of garbled, distorted, or unintelligible voice transmissions
d)
Frequent blowing of power supply fuses
100 %
