G6 – CIRCUIT COMPONENTS [2 Exam Questions – 2 Groups]

Question 1

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

Answer 1

G6A01 (C)

C. 10.5 volts

Question 2

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

Answer 2

G6A02 (B)

B. High discharge current

Question 3

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

Answer 3

G6A03 (B)

B. 0.3 volts

Question 4

Which of the following is an advantage of an electrolytic capacitor?

A. Tight tolerance
B. Much less leakage than any other type
C. High capacitance for a given volume
D. Inexpensive RF capacitor

Answer 4

G6A04 (C)

C. High capacitance for a given volume

Question 5

What is the approximate junction threshold voltage of a conventional silicon diode?

A. 0.1 volt
B. 0.3 volts
C. 0.7 volts
D. 1.0 volts

Answer 5

G6A05 (C)

C. 0.7 volts

Question 6

Which of the following is a reason not to use wire-wound resistors in an RF circuit?

A. The resistor’s tolerance value would not be adequate for such a circuit
B. The resistor’s inductance could make circuit performance unpredictable
C. The resistor could overheat
D. The resistor’s internal capacitance would detune

Answer 6

G6A06 (B)

B. The resistor’s inductance could make circuit performance unpredictable

Question 7

What are the stable operating points for a bipolar transistor used as a switch in a logic circuit?

A. Its saturation and cutoff regions
B. Its active region (between the cutoff and saturation regions)
C. Its peak and valley current points
D. Its enhancement and depletion modes

Answer 7

G6A07 (A)

A. Its saturation and cutoff regions

Question 8

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 these choices are correct

Answer 8

G6A08 (D)

D. All these choices are correct

Question 9

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 layer
D. The source is formed by depositing metal on silicon

Answer 9

G6A09 (B)

B. The gate is separated from the channel with a thin insulating layer

Question 10

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. Trigger electrode

Answer 10

G6A10 (A)

A. Control grid

Question 11

What happens when an inductor is operated above its self-resonant frequency?

A. Its reactance increases
B. Harmonics are generated
C. It becomes capacitive
D. Catastrophic failure is likely

Answer 11

G6A11 (C)

C. It becomes capacitive

Question 12

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 control grid resistance
D. To decrease plate resistance

Answer 12

G6A12 (A)

A. To reduce grid-to-plate capacitance

Question 13

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 these choices are correct

Answer 13

G6A13 (D)

D. All these choices are correct

Question 14

Which of the following is an advantage of ceramic capacitors as compared to other types of capacitors?

A. Tight tolerance
B. High stability
C. High capacitance for given volume
D. Comparatively low cost

Answer 14

G6A14 (D)

D. Comparatively low cost

Question 15

What determines the performance of a ferrite core at different frequencies?

A. Its conductivity
B. Its thickness
C. The composition, or “mix,” of materials used
D. The ratio of outer diameter to inner diameter

Answer 15

G6B01 (C)

C. The composition, or “mix,” of materials used

Question 16

What is meant by the term MMIC?

A. Multi-Megabyte Integrated Circuit
B. Monolithic Microwave Integrated Circuit
C. Military Manufactured Integrated Circuit
D. Mode Modulated Integrated Circuit

Answer 16

G6B02 (B)

B. Monolithic Microwave Integrated Circuit

Question 17

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

A. Low power consumption
B. High power handling capability
C. Better suited for RF amplification
D. Better suited for power supply regulation

Answer 17

G6B03 (A)

A. Low power consumption

Question 18

What is meant by the term ROM?

A. Resistor Operated Memory
B. Read Only Memory
C. Random Operational Memory
D. Resistant to Overload Memory

Answer 18

G6B04 (B)

B. Read Only Memory

Question 19

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

Answer 19

G6B05 (C)

C. The stored information is maintained even if power is removed

Question 20

What kind of device is an integrated circuit operational amplifier?

A. Digital
B. MMIC
C. Programmable Logic
D. Analog

Answer 20

G6B06 (D)

D. Analog

Question 21

Which of the following describes a type N connector?

A. A moisture-resistant RF connector useful to 10 GHz
B. A small bayonet connector used for data circuits
C. A threaded connector used for hydraulic systems
D. An audio connector used in surround-sound installations

Answer 21

G6B07 (A)

A. A moisture-resistant RF connector useful to 10 GHz

Question 22

How is an LED biased when emitting light?

A. Beyond cutoff
B. At the Zener voltage
C. Reverse biased
D. Forward biased

Answer 22

G6B08 (D)

D. Forward biased

Question 23

Which of the following is a characteristic of a liquid crystal display?

A. It utilizes ambient or back lighting
B. It offers a wide dynamic range
C. It consumes relatively high power
D. It has relatively short lifetime

Answer 23

G6B09 (A)

A. It utilizes ambient or back lighting

Question 24

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

A. By creating an impedance in the current’s path
B. It converts common-mode current to differential mode
C. By creating an out-of-phase current to cancel the common-mode current
D. Ferrites expel magnetic fields

Answer 24

G6B10 (A)

A. By creating an impedance in the current’s path

Question 25

What is a type SMA connector?

A. A large bayonet connector usable at power levels more than 1 KW
B. A small threaded connector suitable for signals up to several GHz
C. A connector designed for serial multiple access signals
D. A type of push-on connector intended for high-voltage applications

Answer 25

G6B11 (B)

B. A small threaded connector suitable for signals up to several GHz

Question 26

Which of these connector types is commonly used for audio signals in Amateur Radio stations?

A. PL-259
B. BNC
C. RCA Phono
D. Type N

Answer 26

G6B12 (C)

C. RCA Phono

Question 27

Which of these connector types is commonly used for RF connections at frequencies up to 150 MHz?

A. Octal
B. RJ-11
C. PL-259
D. DB-25

Answer 27

G6B13 (C)

C. PL-259