ELEMENT 2 - TECHNICIAN CLASS
Question Pool
SUBELEMENT T7 -- PRACTICAL CIRCUITS [2 Exam Questions -- 2 Groups] T7A Functional layout of station components including transmitter, transceiver, receiver, power supply, antenna, antenna switch, antenna feed line, impedance-matching device, SWR meter; station layout and accessories for radiotelephone, radioteleprinter (RTTY) or packet T7A01 (B)What would you connect to your transceiver if you wanted to switch it between several antennas? A. A terminal-node switch B. An antenna switch C. A telegraph key switch
D. A high-pass filter T7A02 (D)
What connects your transceiver to your antenna? A. A dummy load
B. A ground wire
C. The power cord D. A feed line T7A03 (A)
If your mobile transceiver works in your car but not in your home, what should you check first? A. The power supply B. The speaker
C. The microphone
D. The SWR meter T7A04 (A)
What does an antenna tuner do? A. It matches a transceiver output impedance to the antenna system impedance B. It helps a receiver automatically tune in stations that are far away
C. It switches an antenna system to a transceiver when sending, and to a receiver when listening
D. It switches a transceiver between different kinds of antennas connected to one feed line
T7A05 (B) In Figure N7-1, if block 1 is a transceiver and block 3 is a dummy antenna, what is block 2? A. A terminal-node switch B. An antenna switch C. A telegraph key switch
D. A high-pass filter T7A06 (D)
In Figure N7-1, if block 1 is a transceiver and block 2 is an antenna switch, what is block 3? A. A terminal-node switch
B. An SWR meter
C. A telegraph key switch D. A dummy antenna
T7A07 (C) In Figure N7-2, if block 1 is a transceiver and block 3 is an antenna switch, what is block 2? A. A terminal-node switch
B. A dipole antenna C. An SWR meter D. A high-pass filter
T7A08 (B) In Figure N7-3, if block 1 is a transceiver and block 2 is an SWR meter, what is block 3? A. An antenna switch B. An antenna tuner C. A key-click filter
D. A terminal-node controller T7A09 (D)
What would you connect to a transceiver for voice operation? A. A splatter filter
B. A terminal-voice controller
C. A receiver audio filter D. A microphone T7A10 (A)
What would you connect to a transceiver for RTTY operation? A. A modem and a teleprinter or computer system B. A computer, a printer and a RTTY refresh unit
C. A data-inverter controller
D. A modem, a monitor and a DTMF keypad T7A11 (B)
In packet-radio operation, what equipment connects to a terminal-node controller? A. A transceiver and a modem B. A transceiver and a terminal or computer system C. A DTMF keypad, a monitor and a transceiver
D. A DTMF microphone, a monitor and a transceiver T7B Transmitter and receiver block diagrams; purpose and operation of low-pass, high-pass and band-pass filters T7B01 (D)
What circuit uses a limiter and a frequency discriminator to produce an audio signal? A. A double-conversion receiver
B. A variable-frequency oscillator
C. A superheterodyne receiver D. An FM receiver
T7B02 (D) What circuit is pictured in Figure T7-1 if block 1 is a variable-frequency oscillator? A. A packet-radio transmitter
B. A crystal-controlled transmitter
C. A single-sideband transmitter D. A VFO-controlled transmitter T7B03 (A)
What circuit is pictured in Figure T7-1 if block 1 is a crystal oscillator? A. A crystal-controlled transmitter B. A VFO-controlled transmitter
C. A single-sideband transmitter
D. A CW transceiver
T7B04 (C) What type of circuit does Figure T7-2 represent if block 1 is a product detector? A. A simple phase modulation receiver
B. A simple FM receiver C. A simple CW and SSB receiver D. A double-conversion multiplier T7B05 (D)
If Figure T7-2 is a diagram of a simple single-sideband receiver, what type of circuit should be shown in block 1? A. A high pass filter
B. A ratio detector
C. A low pass filter D. A product detector
T7B06 (D) What circuit is pictured in Figure T7-3, if block 1 is a frequency discriminator? A. A double-conversion receiver
B. A variable-frequency oscillator
C. A superheterodyne receiver D. An FM receiver T7B07 (C)
Why do modern HF transmitters have a built-in low-pass filter in their RF output circuits? A. To reduce RF energy below a cutoff point
B. To reduce low-frequency interference to other amateurs C. To reduce harmonic radiation D. To reduce fundamental radiation T7B08 (A)
What circuit blocks RF energy above and below certain limits? A. A band-pass filter B. A high-pass filter
C. An input filter
D. A low-pass filter T7B09 (A)
What type of filter is used in the IF section of receivers to block energy outside a certain frequency range? A. A band-pass filter B. A high-pass filter
C. An input filter
D. A low-pass filter T7B10 (C)
What circuit function is found in all types of receivers? A. An audio filter
B. A beat-frequency oscillator C. A detector D. An RF amplifier T7B11 (D)
What would you use to connect a dual-band antenna to a mobile transceiver which has separate VHF and UHF outputs? A. A dual-needle SWR meter
B. A full-duplex phone patch
C. Twin high-pass filters D. A duplexer