E5C Impedance diagrams: Basic principles of
Smith charts; impedance
of
RLC networks at specified frequencies
E5C01
(A)
What
type of graph can be used to calculate impedance along transmission lines?
A. A Smith chart
B. A logarithmic chart
C. A Jones chart
D. A radiation pattern chart
E5C02
(B)
What
type of coordinate system is used in a Smith chart?
A. Voltage and current circles
B. Resistance and reactance
circles
C. Voltage and current lines
D. Resistance and reactance lines
E5C03
(C)
What
type of calculations can be performed using a Smith chart?
A. Beam headings and radiation patterns
B. Satellite azimuth and elevation bearings
C. Impedance and SWR values
in transmission lines
D. Circuit gain calculations
E5C04
(C)
What
are the two families of circles that make up a Smith chart?
A. Resistance and voltage
B. Reactance and voltage
C. Resistance and reactance
D. Voltage and impedance
E5C05
(A)
What
type of chart is shown in Figure E5-1?
A. Smith chart
B. Free-space radiation directivity chart
C. Vertical-space radiation pattern chart
D. Horizontal-space radiation pattern chart
E5C06
(B)
On the
Smith chart shown in Figure E5-1, what is the name for the large outer circle
bounding the coordinate portion of the chart?
A. Prime axis
B. Reactance axis
C. Impedance axis
D. Polar axis
E5C07
(D)
On the
Smith chart shown in Figure E5-1, what is the only straight line shown?
A. The reactance axis
B. The current axis
C. The voltage axis
D. The resistance axis
E5C08
(C)
What is
the process of normalizing with regard to a Smith chart?
A. Reassigning resistance values with regard to
the reactance axis
B. Reassigning reactance values with regard to
the resistance axis
C. Reassigning resistance
values with regard to the prime center
D. Reassigning prime center with regard to the
reactance axis
E5C09
(A)
What is
the third family of circles, which are added to a Smith chart during the
process of solving problems?
A. Standing-wave ratio
circles
B. Antenna-length circles
C. Coaxial-length circles
D. Radiation-pattern circles
E5C10
(A)
In
rectangular coordinates, what is the impedance of a network comprised of a
10-microhenry inductor in series with a 40-ohm resistor at 500 MHz?
A. 40 + j31,400
B. 40 - j31,400
C. 31,400 + j40
D. 31,400 - j40
E5C11
(C)
In
polar coordinates, what is the impedance of a network comprised of a
100-picofarad capacitor in parallel with a 4,000-ohm resistor at 500 kHz?
A. 2490 ohms, /__51.5_degrees__
B. 4000 ohms, /__38.5_degrees__
C. 2490 ohms,
/__-51.5_degrees__
D. 5112 ohms, /__-38.5_degrees__
E5C12
(D)
Which
point on Figure E5-2 best represents the impedance of a series circuit
consisting of a 300-ohm resistor, a 0.64-microhenry inductor and a 85-picofarad
capacitor at 24.900 MHz?
A. Point 1
B. Point 3
C. Point 5
D. Point 8