HAM Radio 1/HamRadio.cdr/cw/novicepl/nov6.dat

Text File | 1992-01-10 | 13KB | 363 lines

210D-7-3.1 A 7-7   A minimum meter reading of One to One |is  the ideal reading  and no/negative|readings are not possible if connected
What kind of SWR meter reading may indicate poor electrical
contact between parts of an antenna system?
A. An erratic reading
B. An unusually low reading
C. No reading at all
D. A negative reading
*
211D-7-3.2 A 7-6   Big Bird landed on the antenna or the|antenna fell down/is the wrong length|or the feed-line is defective etc.
What does an unusually high SWR-meter reading indicate?
A. That the antenna is not the correct length, or that there is
   an open or shorted connection somewhere in the feed line
B. That the signals arriving at the antenna are unusually strong,
   indicating good radio conditions
C. That the transmitter is producing more power than normal,
   probably indicating that the final amplifier tubes or transistors
   are about to go bad
D. That there is an unusually large amount of solar white-noise
   radiation, indicating very poor radio conditions
*
212D-7-3.3 B 7-7   Antenna is too long for the band
The SWR-meter reading at the low-frequency end of an amateur band
is 2.5:1, and the SWR-meter reading at the high-frequency end of
the same band is 5:1.  What does this indicate about your antenna?
A. The antenna is broadbanded
B. The antenna is too long for operation on this band
C. The antenna is too short for operation on this band
D. The antenna has been optimized for operation on this band
*
213D-7-3.4 C 7-7   Antenna is too short for the band
The SWR-meter reading at the low-frequency end of an amateur band
is 5:1, and the SWR-meter reading at the high-frequency end of the
same band is 2.5:1.  What does this indicate about your antenna?
A. The antenna is broadbanded
B. The antenna is too long for operation on this band
C. The antenna is too short for operation on this band
D. Grounding the receiver makes the problem worse
*
214D-8-1.1 C 10-4  May be in-band or out-of-band
What is meant by receiver overload?
A. Interference caused by transmitter harmonics
B. Interference caused by overcrowded band conditions
C. Interference caused by strong signals from a nearby
   transmitter
D. Interference caused by turning the receiver volume
   too high
*
215D-8-1.2 B 10-4  The receiver will not work|properly on any frequency
What is a likely indication that radio-frequency interference
to a receiver is caused by front-end overload?
A. A low pass filter at the transmitter reduces interference
   sharply
B. The interference is independent of frequency
C. A high pass filter at the receiver reduces interference
   little or not at all
D. Grounding the receiver makes the problem worse
*
216D-8-1.3 C 10-4  Overload
Your neighbor reports interference to his television whenever you
are transmitting from your amateur station. This interference occurs
regardless of your transmitter frequency. What is likely to be the
cause of the interference?
A. Inadequate transmitter harmonic suppression
B. Receiver VR tube discharge
C. Receiver overload
D. Incorrect antenna length
*
217D-8-1.4 B 10-5  High pass filters remove all|signals  below the filter's |cutoff frequency
What type of filter should be installed on a TV receiver as the
first step in preventing RF overload from an amateur HF station
transmission?
A. Low pass
B. High pass
C. Band pass
D. Notch
*
218D-8-2.1 A 10-4  Times 2, 3, etc. of the transmitter|output frequency
What is meant by harmonic radiation?
A. Transmission of signals at whole number multiples of the
   fundamental (desired) frequency
B. Transmission of signals that include a superimposed 60-Hz hum
C. Transmission of signals caused by sympathetic vibrations from
   a nearby transmitter
D. Transmission of signals to produce a stimulated emission in
   the air to enhance skip propagation
*
219D-8-2.2 A 10-4  Excessive harmonics can cause |interference to other stations|and are illegal also
Why is harmonic radiation from an amateur station undesirable?
A. It will cause interference to other stations and may result
   in out-of-band signal radiation
B. It uses large amounts of electric power
C. It will cause sympathetic vibrations in nearby transmitters
D. It will produce stimulated emission in the air above the
   transmitter, thus causing aurora
*
220D-8-2.3 A 10-4  Signal that are 2, 3, etc. times|the transmitter output frequency|are call harmonics
What type of interference may radiate from a multi-band
antenna connected to an improperly tuned transmitter?
A. Harmonic radiation
B. Auroral distortion
C. Parasitic excitation
D. Intermodulation
*
221D-8-2.4 C 10-6  Keeps the RF energy inside and|prevents unwanted RF radiation
What is the purpose of shielding in a transmitter?
A. It gives the low pass filter structural stability
B. It enhances the microphonic tendencies of
   radiotelephone transmitters
C. It prevents unwanted RF radiation
D. It helps maintain a sufficiently high operating
   temperature in circuit components
*
222D-8-2.5 D 10-4  Channel 3 is 60 to 66 MHz|which is the 3rd harmonic|of the 15 meter band
Your neighbor reports interference on one or two channels of her
television when you are transmitting from your amateur station.
This interference only occurs when you are operating on 15 meters.
What is likely to be the cause of the interference?
A. Excessive low-pass filtering on the transmitter
B. Sporadic E de-ionization near your neighbor's TV antenna
C. TV Receiver front-end overload
D. Harmonic radiation from your transmitter
*
223D-8-2.6 B 10-5  The frequencies of harmonic radiation|are above the desired signal and can |be removed with a low-pass filter
What type of filter should be installed on an amateur transmitter
as the first step in reducing harmonic radiation?
A. Key click filter
B. Low pass filter
C. High pass filter
D. CW filter
*
224D-8-3.1 A 10-3  Is your wife complaining about the TV?|If she is, check your equipment.
If you are notified that your amateur station is causing television
interference, what should you do first?
A. Make sure that your amateur equipment is operating properly,
   and that it does not cause interference to your own television
B. Immediately turn off your transmitter and contact the nearest
   FCC office for assistance
C. Install a high-pass filter at the transmitter output and a low-
   pass filter at the antenna-input terminals of the TV
D. Continue operating normally, since you have no legal obligation
   to reduce or eliminate the interference
*
225D-8-3.2 B 10-3  Work with neighbor to determine the|cause and work together to fix the |problem
Your neighbor informs you that you are causing television
interference, but you are sure your amateur equipment is
operating properly and you cause no interference to your
own TV.  What should you do?
A. Immediately turn off your transmitter and contact the
   nearest FCC office for assistance
B. Work with your neighbor to determine that you are actually
   the cause of the interference
C. Install a high-pass filter at the transmitter output and
   a low-pass filter at the antenna-input terminals of the TV
D. Continue operating normally, since you have no legal
   obligation to reduce or eliminate the interference
*
226E-1-1.1 C 3-2   Mega is 106,  Giga is 109|1200E6 = 1.2E9 or 1.2 GHz
Your receiver dial is calibrated in megahertz and shows a
signal at 1200 MHz. At what frequency would a dial calibrated
in gigahertz show the signal?
A. 1,200,000 GHz
B. 12 GHz
C. 1.2 GHz
D. 0.0012 GHz
*
227E-1-2.1 B 3-2   Kilo is 103, Mega is 106|7125E3 = 7.125E6
Your receiver dial is calibrated in kilohertz and shows
a signal at 7125 kHz.  At what frequency would a dial
calibrated in megahertz show the signal?
A. 0.007125 MHz
B. 7.125 MHz
C. 71.25 MHz
D. 7,125,000 MHz
*
228E-1-2.2 D 3-2   Mega is 106,   Giga is 109|1.2E9 = 1200E6 or 1200 MHz
Your receiver dial is calibrated in gigahertz and shows
a signal at 1.2 GHz.  At what frequency would a dial
calibrated in megahertz show the same signal?
A. 1.2 MHz
B. 12 MHz
C. 120 MHz
D. 1200 MHz
*
229E-1-3.1 B 3-2   Kilo is 103, Mega is 106|3.525E6 = 3525E3
Your receiver dial is calibrated in megahertz and shows
a signal at 3.525 MHz.  At what frequency would a dial
calibrated in kilohertz show the signal?
A. 0.003525 kHz
B. 3525 kHz
C. 35.25 kHz
D. 3,525,000 kHz
*
230E-1-3.2 D 3-2   Kilo is 103 or 10E3|3725 kHz = 3,725,000
Your receiver dial is calibrated in kilohertz and shows
a signal at 3725 kHz.  At what frequency would a dial
calibrated in Hertz show the same signal?
A. 3,725 Hz
B. 3.725 Hz
C. 37.25 Hz
D. 3,725,000 Hz
*
231E-1-4.1 B 3-2   Centi is 10-2 or 10E-2|400E-2 = 4E0 or 4
How long (in meters) is an antenna that is 400 centimeters
long?
A. 0.0004 meters
B. 4 meters
C. 40 meters
D. 40,000 meters
*
232E-1-5.1 C 3-2   Milli is 10-3 or 10E-3
What reading will be displayed on a meter calibrated in amperes
when it is being used to measure a 3000-milliampere current?
A. 0.003 amperes
B. 0.3 amperes
C. 3 amperes
D. 3,000,000 amperes
*
233E-1-5.2 C 3-2   Milli is 10-3 or 10E-3
What reading will be displayed on a meter calibrated in volts
when it is being used to measure a 3500-millivolt potential?
A. 350 volts
B. 35 volts
C. 3.5 volts
D. 0.35 volts
*
234E-1-6.1 B 3-2   Micro is 10-6 or 10E-6
How many farads is 500,000 microfarads?
A. 0.0005 farads
B. 0.5 farads
C. 500 farads
D. 500,000,000 farads
*
235E-1-7.1 B 3-2   Pico is Micro-micro or 10E-12|1E6*1E-12 = 1E-6 or 1 µF
How many microfarads is 1,000,000 picofarads?
A. 0.001 microfarads
B. 1 microfarad
C. 1,000 microfarads
D. 1,000,000,000 microfarads
*
236E-2-1.1 D 3-4   The term used to describe the flow of|electrons is current and the symbol I|is used in equations for current
What is the term used to describe the flow of electrons in an
electric circuit?
A. Voltage
B. Resistance
C. Capacitance
D. Current
*
237E-2-2.1 C 3-5   Amp.
What is the basic unit of electric current?
A. The volt
B. The watt
C. The ampere
D. The ohm
*
238E-3-1.1 A 3-4   Electromotive force is another term|for voltage and is the force that  |causes current to flow
What supplies the force that will cause electrons to flow
through a circuit?
A. Electromotive force, or voltage
B. Magnetomotive force, or inductance
C. Farad force, or capacitance
D. Thermodynamic force, or entropy
*
239E-3-1.2 D 3-4   EMF, ElectroMotive Force is|another term for voltage
The pressure in a water pipe is comparable to what force in an
electrical circuit?
A. Current
B. Resistance
C. Gravitation
D. Voltage
*
240E-3-1.3 C 3-4   + and -,  plus and minus, |positive and negative etc.
An electric circuit must connect to two terminals of a
voltage source.  What are these two terminals called?
A. The north and south poles
B. The positive and neutral terminals
C. The positive and negative terminals
D. The entrance and exit terminals
*
241E-3-2.1 A 3-4   VOLTage
What is the basic unit of voltage?
A. The volt
B. The watt
C. The ampere
D. The ohm
*
242E-4.1   C 3-5   Aluminum is a good conductor|and paper is not
List at least three good electrical conductors.
A. Copper, gold, mica
B. Gold, silver, wood
C. Gold, silver, aluminum
D. Copper, aluminum, paper
*
243E-5.1   A 3-5   Plastic is an insulator|and carbon is not
List at least four good electrical insulators.
A. Glass, air, plastic, porcelain
B. Glass, wood, copper, porcelain
C. Paper, glass, air, aluminum
D. Plastic, rubber, wood, carbon
*
244E-6-1.1 D 3-6   The opposition to the flow of|current through a material is|called resistance
There is a limit to the electric current that can pass through
any material.  What is this current limiting called?
A. Fusing
B. Reactance
C. Saturation
D. Resistance
*
245E-6-1.2 A 3-6   The component that opposes(resists)|current flow is called a resistor
What is an electrical component called that opposes electron
movement through a circuit?
A. A resistor
B. A reactor
C. A fuse
D. An oersted
*
246E-6-2.1 D 3-6   The basic unit of resistance  |is the ohm and the symbol is Ω
What is the basic unit of resistance?
A. The volt
B. The watt
C. The ampere
D. The ohm
*
247E-7.1   C 3-7   The relationship E = I*R|is called Ohm's Law
What electrical principle relates voltage, current and resistance
in an electric circuit?
A. Ampere's Law
B. Kirchhoff's Law
C. Ohm's Law
D. Tesla's Law
*
248E-7.2   C 3-7   E = I*R |E = 2*50|E = 100
There is a 2-amp current through a 50-ohm resistor.  What is the
applied voltage?
A. 0.04 volts
B. 52 volts
C. 100 volts
D. 200 volts
*
249E-7.3   B 3-7   I = E/R    |I = 200/100|I = 2
If 200 volts is applied to a 100-ohm resistor, what is the current
through the resistor?
A. 0.5 amps
B. 2 amps
C. 50 amps
D. 20000 amps
*
250E-7.4   C 3-7   R = E/I |R = 90/3|R = 30
There is a 3-amp current through a resistor and we know that the
applied voltage is 90 volts. What is the value of the resistor?
A. 0.03 ohms
B. 10 ohms
C. 30 ohms
D. 2700 ohms
*
251E-8.1   D 3-10  Energy, like electrical energy, is the|term used for the ability to do work
What is the term used to describe the ability to do work?
A. Voltage
B. Power
C. Inertia
D. Energy
*