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Precision Software Appli…tions Silver Collection 1
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Precision Software Applications Silver Collection Volume One (PSM) (1993).iso
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tutor
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arsg10.exe
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ARSGDAT.3BE
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1992-10-04
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7KB
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326 lines
;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\:
; :
; AMATEUR RADIO STUDY GUIDE v1.00 :
; :
; Copyright (c) 1992 David Drzyzga - All Rights Reserved :
; :
; Based on a program coded in BASIC by Russ Revels :
; :
;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\:
;
; You can include comments an the file anywhere you want
; just like these comments. You cannot put a comment in
; the middle of a line though.
;
; When modifying this file, there are several things you
; must be aware of:
;
; -> Any line of text in this file cannot exceed 65 characters!
; this is the 65th character^
;
; No harm will be done, but nothing over 65 characters will
; be read by the program.
;
; -> Do not make questions more than 20 lines long, or you
; will receive an 'out of memory' error when you execute
; the program.
;
; -> You can add or delete questions as you please, just be
; sure to follow the format of the existing questions.
;
;
;
(3BE-1.1)
What is meant by the term impedance?
C. The opposition to the flow of AC in a circuit
*
(3BE-1.2)
What is the opposition to the flow of AC in a circuit containing
both resistance and reactance called?
C. Impedance
*
(3BE-3.1)
What is meant by the term reactance?
B. Opposition to AC caused by inductors and capacitors
*
(3BE-3.2)
What is the opposition to the flow of AC caused by an inductor
called?
D. Reactance
*
(3BE-3.3)
What is the opposition to the flow of AC caused by a capacitor
called?
D. Reactance
*
(3BE-3.4)
How does a coil react to AC?
D. As the frequency of the applied AC increases, the reactance
also increases
*
(3BE-3.5)
How does a capacitor react to AC?
A. As the frequency of the applied AC increases, the reactance
decreases
*
(3BE-6.1)
When will a power source deliver maximum output?
A. When the impedance of the load is equal to the impedance of
the source
*
(3BE-6.2)
What is meant by impedance matching?
D. To make the load impedance equal the source impedance
*
(3BE-6.3)
What occurs when the impedance of an electrical load is equal to
the internal impedance of the power source?
D. The source delivers maximum power to the load
*
(3BE-6.4)
Why is impedance matching important in radio work?
A. So the source can deliver maximum power to the load
*
(3BE-7.2)
What is the unit measurement of reactance?
B. Ohm
*
(3BE-7.4)
What is the unit measurement of impedance?
A. Ohm
*
(3BE-10.1)
What is a bel?
A. The basic unit used to describe a change in power levels
*
(3BE-10.2)
What is a decibel?
A. A unit used to describe a change in power levels, equal to
0.1 bel
*
(3BE-10.3)
Under ideal conditions, a barely detectable change in loudness
is approximately how many dB?
D. 1 dB
*
(3BE-10.4)
A two-times increase in power results in a change of how many
dB?
B. Multiplying the original power by 2 gives a new power that is
3 dB higher
*
(3BE-10.5)
An increase of 6 dB results from raising the power by how many
times?
D. Multiply the original power by 4 to get the new power
*
(3BE-10.6)
A decrease of 3 dB results from lowering the power by how many
times?
B. Divide the original power by 2 to get the new power
*
(3BE-10.7)
A signal strength report is "10 dB over S9". If the transmitter
power is reduced from 1500 watts to 150 watts, what should be
the new signal strength report?
C. S9
*
(3BE-10.8)
A signal strength report is "20 dB over S9". If the transmitter
power is reduced from 1500 watts to 150 watts, what should be
the new signal strength report?
D. S9 plus 10 dB
*
(3BE-10.9)
A signal strength report is "20 dB over S9". If the transmitter
power is reduced from 1500 watts to 15 watts, what should be the
new signal strength report?
C. S9
*
(3BE-12.1)
If a 1.0-ampere current source is connected to two
parallel-connected 10 ohm resistors, how much current passes
through each resistor?
D. 0.5 ampere
*
(3BE-12.3)
In a parallel circuit with a voltage source and several branch
resistors, what relationship does the total current have to the
current in the branch circuits?
B. The total current equals the sum of the branch current
through each resistor
*
(3BE-13.1)
How many watts of electrical power are being used when a 400-VDC
power source supplies an 800 ohm load?
B. 200 watts
*
(3BE-13.2)
How many watts of electrical power are being consumed by a
12-VDC pilot light which draws 0.2-amperes?
D. 2.4 watts
*
(3BE-13.3)
How many watts are being dissipated when 7.0-milliamperes flows
through 1.25 kilohms?
A. Approximately 61 milliwatts
*
(3BE-14.1)
How is the total resistance calculated for several resistors in
series?
C. The total resistance is found by adding the individual
resistances together
*
(3BE-14.2)
What is the total resistance of two equal, parallel-connected
resistors?
D. Half the resistance of either resistor
*
(3BE-14.3)
What is the total inductance of two equal, parallel-connected
inductors?
A. Half the inductance of either inductor, assuming no mutual
coupling
*
(3BE-14.4)
What is the total capacitance of two equal, parallel-connected
capacitors?
B. Twice the capacitance of either capacitor
*
(3BE-14.5)
What is the total resistance of two equal, series-connected
resistors?
B. Twice the resistance of either resistor
*
(3BE-14.6)
What is the total inductance of two equal, series-connected
inductors?
B. Twice the inductance of either inductor, assuming no mutual
coupling
*
(3BE-14.7)
What is the total capacitance of two equal, series-connected
capacitors?
A. Half the capacitance of either capacitor
*
(3BE-15.1)
What is the voltage across a 500 turn secondary winding in a
transformer when the 2250 turn primary is connected to 117-VAC?
C. 26 volts
*
(3BE-15.2)
What is the turns ratio of a transformer to match an audio
amplifier having an output impedance of 200 ohms to a speaker
having an impedance of 10 ohms?
A. 4.47 to 1
*
(3BE-15.3)
What is the turns ratio of a transformer to match an audio
amplifier having an output impedance of 600 ohms to a speaker
having an impedance of 4 ohms?
A. 12.2 to 1
*
(3BE-15.4)
What is the impedance of a speaker which requires a transformer
with a turns ratio of 24 to 1 to match an audio amplifier having
an output impedan of 2000 ohms?
D. 3.5 ohms
*
(3BE-16.1)
What is the voltage that would produce the same amount of heat
over time in a resistive element as would an applied sine wave
AC voltage?
B. A DC voltage equal to the RMS value of the AC voltage
*
(3BE-16.2)
What is the peak-to-peak voltage of a sine wave which has an RMS
voltage of 117-volts?
D. 330.9 volts
*
(3BE-16.3)
A sine wave of 17-volts peak is equivalent to how many volts
RMS?
B. 12 volts
*