2.7 KiB
2.7 KiB
G6A – Resistors; capacitors; inductors; rectifiers; solid-state diodes and transistors; vacuum tubes; batteries
- G6A01 (C)
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
- G6A02 (B)
What is an advantage of batteries with low internal resistance?
- A. Long life
- B. High discharge current
- C. High voltage
- D. Rapid recharge
- G6A03 (B)
What is the approximate forward threshold voltage of a germanium diode?
- A. 0.1 volt
- B. 0.3 volts
- C. 0.7 volts
- D. 1.0 volts
- G6A04 (C)
Which of the following is characteristic 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
- G6A05 (C)
What is the approximate forward threshold voltage of a silicon junction diode?
- A. 0.1 volt
- B. 0.3 volts
- C. 0.7 volts
- D. 1.0 volts
- G6A06 (B)
Why should wire-wound resistors not be used in RF circuits?
- A. The resistor’s tolerance value would not be adequate
- B. The resistor’s inductance could make circuit performance unpredictable
- C. The resistor could overheat
- D. The resistor’s internal capacitance would detune the circuit
- G6A07 (A)
What are the operating points for a bipolar transistor used as a switch?
- A. Saturation and cutoff
- B. The active region (between cutoff and saturation)
- C. Peak and valley current points
- D. Enhancement and depletion modes
- G6A08 (D)
Which of the following is characteristic of low voltage ceramic capacitors?
- A. Tight tolerance
- B. High stability
- C. High capacitance for given volume
- D. Comparatively low cost
- G6A09 (B)
Which of the following describes MOSFET construction?
- A. The gate is formed by a back-biased junction
- B. The gate is separated from the channel by 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
- G6A10 (A)
Which element of a vacuum tube regulates the flow of electrons between cathode and plate?
- A. Control grid
- B. Suppressor grid
- C. Screen grid
- D. Trigger electrode
- G6A11 (C)
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
- G6A12 (A)
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