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WorksheetsHam Radio General Questions Till 2019 Set G6A
Total questions: 19
Worksheet time: 19mins
Name
Class
Date
1.
G6A01 What is the minimum allowable discharge voltage for maximum life of a standard 12 volt lead acid battery?
a)
A. 6 volts
b)
B. 8.5 volts
c)
C. 10.5 volts
d)
D. 12 volts
2.
G6A02 What is an advantage of the low internal resistance of nickel-cadmium batteries?
a)
A. Long life
b)
B. High discharge current
c)
C. High voltage
d)
D. Rapid recharge
3.
G6A03 What is the approximate junction threshold voltage of a germanium diode?
a)
A. 0.1 volt
b)
B. 0.3 volts
c)
C. 0.7 volts
d)
D. 1.0 volts
4.
G6A04 When is it acceptable to recharge a carbon-zinc primary cell?
a)
A. As long as the voltage has not been allowed to drop below 1.0 volt
b)
B. When the cell is kept warm during the recharging period
c)
C. When a constant current charger is used
d)
D. Never
5.
G6A05 What is the approximate junction threshold voltage of a conventional silicon diode?
a)
A. 0.1 volt
b)
B. 0.3 volts
c)
C. 0.7 volts
d)
D. 1.0 volts
6.
G6A06 Which of the following is an advantage of using a Schottky diode in an RF switching circuit rather than a standard silicon diode?
a)
A. Lower capacitance
b)
B. Lower inductance
c)
C. Longer switching times
d)
D. Higher breakdown voltage
7.
G6A07 What are the stable operating points for a bipolar transistor used as a switch in a logic circuit?
a)
A. Its saturation and cutoff regions
b)
B. Its active region (between the cutoff and saturation regions)
c)
C. Its peak and valley current points
d)
D. Its enhancement and depletion modes
8.
G6A08 Why must the cases of some large power transistors be insulated from ground?
a)
A. To increase the beta of the transistor
b)
B. To improve the power dissipation capability
c)
C. To reduce stray capacitance
d)
D. To avoid shorting the collector or drain voltage to ground
9.
G6A09 Which of the following describes the construction of a MOSFET?
a)
A. The gate is formed by a back-biased junction
b)
B. The gate is separated from the channel with a thin insulating layer
c)
C. The source is separated from the drain by a thin insulating layer
d)
D. The source is formed by depositing metal on silicon
10.
G6A10 Which element of a triode vacuum tube is used to regulate the flow of electrons between cathode and plate?
a)
A. Control grid
b)
B. Heater
c)
C. Screen Grid
d)
D. Trigger electrode
11.
G6A11 Which of the following solid state devices is most like a vacuum tube in its general operating characteristics?
a)
A. A bipolar transistor
b)
B. A field effect transistor
c)
C. A tunnel diode
d)
D. A varistor
12.
G6A12 What is the primary purpose of a screen grid in a vacuum tube?
a)
A. To reduce grid-to-plate capacitance
b)
B. To increase efficiency
c)
C. To increase the control grid resistance
d)
D. To decrease plate resistance
13.
G6A13 Why is the polarity of applied voltages important for polarized capacitors?
a)
A. Incorrect polarity can cause the capacitor to short-circuit
b)
B. Reverse voltages can destroy the dielectric layer of an electrolytic capacitor
c)
C. The capacitor could overheat and explode
d)
D. All of these choices are correct
14.
G6A14 Which of the following is an advantage of ceramic capacitors as compared to other types of capacitors?
a)
A. Tight tolerance
b)
B. High stability
c)
C. High capacitance for given volume
d)
D. Comparatively low cost
15.
G6A15 Which of the following is an advantage of an electrolytic capacitor?
a)
A. Tight tolerance
b)
B. Much less leakage than any other type
c)
C. High capacitance for a given volume
d)
D. Inexpensive RF capacitor
16.
G6A16 What will happen to the resistance if the temperature of a resistor is increased?
a)
A. It will change depending on the resistor’s reactance coefficient
b)
B. It will stay the same
c)
C. It will change depending on the resistor's temperature coefficient
d)
D. It will become time dependent
17.
G6A17 Which of the following is a reason not to use wire-wound resistors in an RF circuit?
a)
A. The resistor's tolerance value would not be adequate for such a circuit
b)
B. The resistor's inductance could make circuit performance unpredictable
c)
C. The resistor could overheat
d)
D. The resistor's internal capacitance would detune the circuit
18.
G6A18 What is an advantage of using a ferrite core toroidal inductor?
a)
A. Large values of inductance may be obtained
b)
B. The magnetic properties of the core may be optimized for a specific range of frequencies
c)
C. Most of the magnetic field is contained in the core
d)
D. All of these choices are correct
19.
G6A19 How should the winding axes of two solenoid inductors be oriented to minimize their mutual inductance?
a)
A. In line
b)
B. Parallel to each other
c)
C. At right angles to each other
d)
D. Interleaved
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