G6 Questions
21 questions in this subelement. Click any question ID for more details.
Answer: B
What is an advantage of batteries with low internal resistance?
ALong life
BHigh discharge current
CHigh voltage
DRapid recharge
Answer: B
What is the approximate forward threshold voltage of a germanium diode?
A0.1 volt
B0.3 volts
C0.7 volts
D1.0 volts
Answer: C
Which of the following is characteristic of an electrolytic capacitor?
ATight tolerance
BMuch less leakage than any other type
CHigh capacitance for a given volume
DInexpensive RF capacitor
Answer: C
What is the approximate forward threshold voltage of a silicon junction diode?
A0.1 volt
B0.3 volts
C0.7 volts
D1.0 volts
Answer: B
Why should wire-wound resistors not be used in RF circuits?
AThe resistor’s tolerance value would not be adequate
BThe resistor’s inductance could make circuit performance unpredictable
CThe resistor could overheat
DThe resistor’s internal capacitance would detune the circuit
Answer: A
What are the operating points for a bipolar transistor used as a switch?
ASaturation and cutoff
BThe active region (between cutoff and saturation)
CPeak and valley current points
DEnhancement and depletion modes
Answer: D
Which of the following is characteristic of low voltage ceramic capacitors?
ATight tolerance
BHigh stability
CHigh capacitance for given volume
DComparatively low cost
Answer: B
Which of the following describes MOSFET construction?
AThe gate is formed by a back-biased junction
BThe gate is separated from the channel by a thin insulating layer
CThe source is separated from the drain by a thin insulating layer
DThe source is formed by depositing metal on silicon
Answer: A
Which element of a vacuum tube regulates the flow of electrons between cathode and plate?
AControl grid
BSuppressor grid
CScreen grid
DTrigger electrode
Answer: C
What happens when an inductor is operated above its self-resonant frequency?
AIts reactance increases
BHarmonics are generated
CIt becomes capacitive
DCatastrophic failure is likely
Answer: A
What is the primary purpose of a screen grid in a vacuum tube?
ATo reduce grid-to-plate capacitance
BTo increase efficiency
CTo increase the control grid resistance
DTo decrease plate resistance
Answer: B
What is meant by the term MMIC?
AMulti-Mode Integrated Circuit
BMonolithic Microwave Integrated Circuit
CMetal Monolayer Integrated Circuit
DMode Modulated Integrated Circuit
Answer: A
Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?
ALow power consumption
BHigh power handling capability
CBetter suited for RF amplification
DBetter suited for power supply regulation
Answer: C
What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?
A50 MHz
B500 MHz
C4 GHz
D40 GHz
Answer: D
What is an advantage of using a ferrite core toroidal inductor?
ALarge values of inductance may be obtained
BThe magnetic properties of the core may be optimized for a specific range of frequencies
CMost of the magnetic field is contained in the core
DAll these choices are correct
Answer: D
What kind of device is an integrated circuit operational amplifier?
ADigital
BMMIC
CProgrammable Logic
DAnalog
Answer: A
Which of the following describes a type N connector?
AA moisture-resistant RF connector useful to 10 GHz
BA small bayonet connector used for data circuits
CA low noise figure VHF connector
DA nickel plated version of the PL-259
Answer: D
How is an LED biased when emitting light?
AIn the tunnel-effect region
BAt the Zener voltage
CReverse biased
DForward biased
Answer: A
How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?
ABy creating an impedance in the current’s path
BIt converts common-mode current to differential mode current
CBy creating an out-of-phase current to cancel the common-mode current
DFerrites expel magnetic fields
Answer: B
What is an SMA connector?
AA type-S to type-M adaptor
BA small threaded connector suitable for signals up to several GHz
CA connector designed for serial multiple access signals
DA type of push-on connector intended for high-voltage applications
Answer: C
Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?
APL-259
BBNC
CRCA Phono
DType N