SUBELEMENT G6 – CIRCUIT COMPONENTS Flashcards
G6A01 (C)
What is the minimum allowable discharge voltage for maximum life of a standard 12 volt lead acid battery?
C. 10.5 volts
G6A02 (B)
What is an advantage of the low internal resistance of nickel-cadmium batteries?
B. High discharge current
G6A03 (B)
What is the approximate junction threshold voltage of a germanium diode?
B. 0.3 volts
G6A04 (D)
When is it acceptable to recharge a carbon-zinc primary cell?
D. Never
G6A05 (C)
What is the approximate junction threshold voltage of a conventional silicon diode?
C. 0.7 volts
G6A06 (A)
Which of the following is an advantage of using a Schottky diode in an RF switching circuit rather than a standard silicon diode?
A. Lower capacitance
G6A07 (A)
What are the stable operating points for a bipolar transistor used as a switch in a logic circuit?
A. Its saturation and cutoff regions
G6A08 (D)
Why must the cases of some large power transistors be insulated from ground?
D. To avoid shorting the collector or drain voltage to ground
G6A09 (B)
Which of the following describes the construction of a MOSFET?
B. The gate is separated from the channel with a thin insulating layer
G6A10 (A)
Which element of a triode vacuum tube is used to regulate the flow of electrons between cathode and plate?
A. Control grid
G6A11 (B)
Which of the following solid state devices is most like a vacuum tube in its general operating characteristics?
B. A field effect transistor
G6A12 (A)
What is the primary purpose of a screen grid in a vacuum tube?
A. To reduce grid-to-plate capacitance
G6A13 (D)
Why is the polarity of applied voltages important for polarized capacitors?
A. Incorrect polarity can cause the capacitor to short-circuit
B. Reverse voltages can destroy the dielectric layer of an electrolytic capacitor
C. The capacitor could overheat and explode
D. All of these choices are correct
G6A14 (D)
Which of the following is an advantage of ceramic capacitors as compared to other types of capacitors?
D. Comparatively low cost
G6A15(C)
Which of the following is an advantage of an electrolytic capacitor?
C. High capacitance for a given volume
G6A16 (C)
What will happen to the resistance if the temperature of a resistor is increased?
C. It will change depending on the resistor’s temperature coefficient
G6A17 (B)
Which of the following is a reason not to use wire-wound resistors in an RF circuit?
B. The resistor’s inductance could make circuit performance unpredictable
G6A18 (D)
What is an advantage of using a ferrite core toroidal inductor?
A. Large values of inductance may be obtained
B. The magnetic properties of the core may be optimized for a specific range of frequencies
C. Most of the magnetic field is contained in the core
D. All of these choices are correct
G6A19 (C)
How should the winding axes of two solenoid inductors be oriented to minimize their mutual inductance?
C. At right angles to each other
G6B01 (D)
Which of the following is an analog integrated circuit?
D. Linear voltage regulator
G6B02 (B)
What is meant by the term MMIC?
B. Monolithic Microwave Integrated Circuit
G6B03 (A)
Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?
A. Low power consumption
G6B04 (B)
What is meant by the term ROM?
B. Read Only Memory
G6B05 (C)
What is meant when memory is characterized as non-volatile?
C. The stored information is maintained even if power is removed
G6B06 (D)
What kind of device is an integrated circuit operational amplifier?
D. Analog
G6B07 (D)
Which of the following is an advantage of an LED indicator compared to an incandescent indicator?
A. Lower power consumption
B. Faster response time
C. Longer life
D. All of these choices are correct
G6B08 (D)
How is an LED biased when emitting light?
D. Forward Biased
G6B09 (A)
Which of the following is a characteristic of a liquid crystal display?
A. It requires ambient or back lighting
G6B10 (A)
What two devices in an Amateur Radio station might be connected using a USB interface?
A. Computer and transceiver
G6B11 (B)
What is a microprocessor?
B. A computer on a single integrated circuit
G6B12 (D)
Which of the following connectors would be a good choice for a serial data port?
D. DE-9
G6B13 (C)
Which of these connector types is commonly used for RF connections at frequencies up to 150 MHz?
C. PL-259
G6B14 (C)
Which of these connector types is commonly used for audio signals in Amateur Radio stations?
C. RCA Phono
G6B15 (B)
What is the main reason to use keyed connectors instead of non-keyed types?
B. Reduced chance of incorrect mating
G6B16 (A)
Which of the following describes a type N connector?
A. A moisture-resistant RF connector useful to 10 GHz
G6B17 (C)
What is the general description of a DIN type connector?
C. A family of multiple circuit connectors suitable for audio and control signals
G6B18 (B)
What is a type SMA connector?
B. A small threaded connector suitable for signals up to several GHz
