G6A02
What type of capacitor is often used in power-supply circuits to filter the rectified AC?
A. Disc ceramic
B. Vacuum variable
C. Mica
D. Electrolytic
G6A03
Which of the following is the primary advantage of ceramic capacitors?
A. Tight tolerance
B. High stability
C. High capacitance for given volume
D. Comparatively low cost
G6A04
Which of the following is an advantage of an electrolytic capacitor?
A. Tight tolerance
B. Non-polarized
C. High capacitance for given volume
D. Inexpensive RF capacitor
G6A05
Which of the following is one effect of lead inductance in a
capacitor used at VHF and above?
A. Effective capacitance may be reduced
B. Voltage rating may be reduced
C. ESR may be reduced
D. The polarity of the capacitor might become reversed
G6A06
What is the main disadvantage of using a conventional wire-wound
resistor in a resonant circuit?
A. The resistor's tolerance value would not be adequate for
such a circuit
B. The resistor's inductance could detune the circuit
C. The resistor could overheat
D. The resistor's internal capacitance would detune the circuit
G6A07
What is an advantage of using a ferrite core with a 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
G6A08
How should two solenoid inductors be placed so as to minimize their mutual inductance?
A. In line with their winding axis
B. With their winding axes parallel to each other
C. With their winding axes at right angles to each another
D. Within the same shielded enclosure
G6A09
Why might it be important to minimize the mutual inductance between two
inductors?
A. To increase the energy transfer between both circuits
B. To reduce or eliminate unwanted coupling
C. To reduce conducted emissions
D. To increase the self-resonant frequency of both inductors
G6A10
What is an effect of inter-turn capacitance in an inductor?
A. The magnetic field may become inverted
B. The inductor may become self resonant at some frequencies
C. The permeability will increase
D. The voltage rating may be exceeded
G6A11
What is the common name for a capacitor connected across a transformer
secondary that is used to absorb transient voltage spikes?
A. Clipper capacitor
B. Trimmer capacitor
C. Feedback capacitor
D. Suppressor capacitor
G6A12
What is the common name for an inductor used to help smooth
the DC output from the rectifier in a conventional power supply?
A. Back EMF choke
B. Repulsion coil
C. Charging inductor
D. Filter choke
G6A13
What type of component is a thermistor?
A. A resistor that is resistant to changes in value with temperature
variations
B. A device having a controlled change in resistance with temperature variations
C. A special type of transistor for use at very cold temperatures
D. A capacitor that changes value with temperature
G6B02
What are the two major ratings that must not be exceeded
for silicon-diode rectifiers?
A. Peak inverse voltage; average forward current
B. Average power; average voltage
C. Capacitive reactance; avalanche voltage
D. Peak load impedance; peak voltage
G6B03
What is the approximate junction threshold voltage of a germanium diode?
A. 0.1 volt
B. 0.3 volts
C. 0.7 volts
D. 1.0 volts
G6B04
When two or more diodes are connected in parallel to increase current
handling capacity, what is the purpose of the resistor connected in series with each diode?
A. The resistors ensure the thermal stability of the power supply
B. The resistors regulate the power supply output voltage
C. The resistors ensure that one diode doesn't carry most of the current
D. The resistors act as swamping resistors in the circuit
G6B05
What is the approximate junction threshold voltage of a silicon diode?
A. 0.1 volt
B. 0.3 volts
C. 0.7 volts
D. 1.0 volts
G6B06
Which of the following is an advantage of using a Schottky diode in
an RF switching circuit as compared to a standard silicon diode?
A. Lower capacitance
B. Lower inductance
C. Longer switching times
D. Higher breakdown voltage
G6B07
What are the stable operating points for a bipolar
transistor that is used as a switch in a logic circuit?
A. Its saturation and cut-off regions
B. Its active region (between the cut-off and saturation regions)
C. Between its peak and valley current points
D. Between its enhancement and deletion modes
G6B08
Why is it often necessary to insulate the case of a large power transistor?
A. To increase the beta of the transistor
B. To improve the power dissipation capability
C. To reduce stray capacitance
D. To avoid shorting the collector or drain voltage to ground
G6B09
Which of the following describes the construction of a MOSFET?
A. The gate is formed by a back-biased junction
B. The gate is separated from the channel with a thin insulating layer
C. The source is separated from the drain by a thin insulating later
D. The source is formed by depositing metal on silicon
G6B10
Which element of a triode vacuum tube is used to regulate the
flow of electrons between cathode and plate?
A. Control grid
B. Heater
C. Screen Grid
D. Suppressor grid
G6B11
Which of the following solid state devices is most like a
vacuum tube in its general characteristics?
A. A bipolar transistor
B. An FET
C. A tunnel diode
D. A varistor
G6B12
What is the primary purpose of a screen grid in a vacuum tube?
A. To reduce grid-to-plate capacitance
B. To increase efficiency
C. To increase the high frequency response
D. To decrease plate resistance
G6B13
What is an advantage of the low internal resistance of Nickel Cadmium batteries?
A. Long life
B. High discharge current
C. High voltage
D. Rapid recharge
G6B14
What is the minimum allowable discharge voltage for maximum life of
a standard 12 volt lead acid battery?
A. 6 volts
B. 8.5 volts
C. 10.5 volts
D. 12 volts
G6B15
When is it acceptable to recharge a carbon-zinc primary cell?
A. As long as the voltage has not been allowed to drop below 1.0 volt
B. When the cell is kept warm during the recharging period
C. When a constant current charger is used
D. Never
G6B16
Which of the following is a rechargeable battery?
A. Carbon-zinc
B. Silver oxide
C. Nickel Metal Hydride
D. Mercury
G6C02
Which of the following is the most commonly used digital logic
family of integrated circuits?
A. RTL
B. TTL
C. CMOS
D. PMOS
G6C03
Which of the following is an advantage of CMOS Logic
integrated circuits compared to TTL logic circuits?
A. Low power consumption
B. High power handling capability
C. Better suited for RF amplification
D. Better suited for power supply regulation
G6C04
What is meant by the term ROM?
A. Resistor Operated Memory
B. Read Only Memory
C. Random Operational Memory
D. Resistant to Overload Memory
G6C05
What is meant when memory is characterized as “non-volatile”?
A. It is resistant to radiation damage
B. It is resistant to high temperatures
C. The stored information is maintained even if power is removed
D. The stored information cannot be changed once written
G6C06
Which type of integrated circuit is an operational amplifier?
A. Digital
B. MMIC
C. Programmable
D. Analog
G6C07
What is one disadvantage of an incandescent indicator compared to a LED?
A. Low power consumption
B. High speed
C. Long life
D. High power consumption
G6C08
How is an LED biased when emitting light?
A. Beyond cutoff
B. At the Zener voltage
C. Reverse Biased
D. Forward Biased
G6C09
Which of the following is a characteristic of a liquid
crystal display?
A. It requires ambient or back lighting
B. It offers a wide dynamic range
C. It has a wide viewing angle
D. All of these choices are correct
G6C10
What is meant by the term MMIC?
A. Multi Megabyte Integrated Circuit?
B. Monolithic Microwave Integrated Circuit
C. Military-specification Manufactured Integrated Circuit
D. Mode Modulated Integrated Circuit
G6C11
What is a microprocessor?
A. A low powered analog signal processor used as
a microwave detector?
B. A miniature computer on a single integrated circuit chip
C. A microwave detector, amplifier, and local oscillator on a chip
D. A low voltage amplifier used in a microwave transmitter modulator stage
G6C12
What two devices in an amateur radio station might be connected
using a USB interface?
A. Computer and transceiver
B. Microphone and transceiver
C. Amplifier and antenna
D. Power supply and amplifier