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40 Cards in this Set
- Front
- Back
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1] What is facsimile?
a} The transmission of characters by radioteletype that form a picture when printed. b} The transmission of still pictures by slow-scan television. c} The transmission of video by television. d} The transmission of printed pictures for permanent display on paper. |
d} The transmission of printed pictures for permanent display on
paper. |
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2] What is the standard scan rate for VHF 137 MHz polar
orbiting weather facsimile reception? a} 240 lines per minute. b} 50 lines per minute. c} 150 lines per second. d} 60 lines per second. |
a} 240 lines per minute.
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3] What is the standard scan rate for high-frequency 3
MHz-23 MHz weather facsimile reception from associated shore stations? a} 240 lines per minute. b} 120 lines per minute. c} 150 lines per second. d} 60 lines per second. |
b} 120 lines per minute.
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4] The Distance Measuring Equipment (DME) measures the
distance from the aircraft to the DME ground station. This is referred to as : a} The slant range. b} DME bearing. c} Glide Slope angle of approach. d} Localizer course width. |
a} The slant range.
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5] What is an ascending pass for a low-earth-orbit
communications satellite? a} A pass from west to east. b} A pass from east to west. c} A pass from south to north. d} A pass from north to south. |
c} A pass from south to north.
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6] What is a descending pass for a low-earth-orbit
communications satellite? a} A pass from north to south. b} A pass from west to east. c} A pass from east to west. d} A pass from south to north |
a} A pass from north to south.
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7] What is the period of a satellite?
a} An orbital arc that extends from 60 degrees west longitude to 145 degrees west longitude. b} The point on an orbit where satellite height is minimum. c} The amount of time it takes for a satellite to complete one orbit. d} The time it takes a satellite to travel from perigee to apogee. |
c} The amount of time it takes for a satellite to complete one
orbit. |
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8] What is the accuracy of a global positioning system (GPS)
fix with selective availability (SA) turned on? a} 100 meters 95% of the time. b} 100 feet 50% of the time. c} 150 meters 95% of the time. d} 10 feet 95% of the time. |
a} 100 meters 95% of the time.
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9] What is the probable cause for a docked vessel to
occasionally register speed and direction on a global positioning system (GPS) receiver? a} Interference entering the antenna cable. b} A misconnection to the associated electronic chart display. c} A loose coaxial cable connector in the antenna unit. d} A normal condition caused by Department of Defense (DOD) selective availability. |
d} A normal condition caused by Department of Defense (DOD)
selective availability. |
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10] What voice communications system will lead to a slight
delay and possible echo in a telephone conversation? a} Propagational delay in communications through a geostationary satellite. b} Acoustic delay and echo over cellular phone frequency. c} Propagational delays and echoes on low-earth-orbit satellites. d} Propagational delays on marine VHF 157/162 MHz bands |
a} Propagational delay in communications through a geostationary
satellite. |
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11] Why does the received signal from a satellite, stabilized
by a computer-pulsed electromagnet, exhibit a fairly rapid pulsed fading effect? a} Because the satellite is rotating. b} Because of ionospheric absorption. c} Because of the satellite's low orbital altitude. d} Because of the Doppler effect. |
a} Because the satellite is rotating.
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12] The majority of airborne Distance Measuring Equipment
systems automatically tune their transmitter and receiver frequencies to the paired ____ channel. a} VOR/marker beacon. b} VOR/LOC. c} Marker beacon/glideslope. d} LOC/Glideslope. |
b} VOR/LOC.
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13] The Distance Measuring Equipment (DME) ground station
has a built-in delay between reception of an interrogation and transmission of the reply to allow : a} Someone to answer the call. b} The VOR to make a mechanical hook-up. c} Clear other traffic for a reply. d} Operation at close range. |
d} Operation at close range.
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14] During soldering operations, "wetting" is :
a} The action of the flux on the surface of the connection. b} The blending of solder and copper to form a new alloy. c} The dipping of the connection in water to cool the connection. d} The operation of cooling the completed connection with flux. |
b} The blending of solder and copper to form a new alloy.
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15] One nautical mile is equal to how many statute miles?
a} 1.5. b} 8.3. c} 1.73. d} 1.15. |
d} 1.15.
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16] Solder most commonly used for hand soldering in
electronics is : a} 50% tin 50% lead. b} 60% tin 40% lead. c} 40% tin 60% lead. d} 30% tin 30% lead. |
b} 60% tin 40% lead.
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17] Which of the following is true about the soldering tip?
a} One size soldering tip is right for all jobs, only the heat is changed. b} If the temperature of the soldering tip is the same in each case, the larger work mass will heat up faster than the smaller one will. c} Iron-plated soldering tips require no preparation before using. d} The soldering tip should be tinned during the initial heating up of the soldering iron. |
d} The soldering tip should be tinned during the initial heating
up of the soldering iron. |
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18] 3:00 PM Central Standard Time is:
a} 1000 UTC. b} 2100 UTC. c} 1800 UTC. d} 0300 UTC. |
b} 2100 UTC.
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19] Which of the following is an acceptable method of solder
removal from holes in a printed board? a} Compressed air. b} Toothpick. c} Soldering iron and a suction device. d} Power drill. |
c} Soldering iron and a suction device.
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20] 6:00 PM PST is equal to what time in UTC?
a} 0200. b} 1800. c} 2300. d} 1300. |
a} 0200.
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21] The ideal method of removing insulation from wire is :
a} The thermal stripper. b} The pocket knife. c} A mechanical wire stripper. d} The scissor action stripping tool. |
a} The thermal stripper.
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22] 2300 UTC time is:
a} 2 PM CST. b} 3 PM PST. c} 10 AM EST. d} 6 AM EST. |
b} 3 PM PST.
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23] One statute mile equals how many nautical miles?
a} 3.8. b} 1.5. c} 0.87. d} 0.7. |
c} 0.87.
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24] When soldering electronic circuits be sure to:
a} Wet wires with flux after soldering. b} Use maximum heat. c} Heat wires until wetting action begins. d} Use maximum solder to insure a good bond. |
c} Heat wires until wetting action begins.
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25] What is the purpose of flux?
a} Removes oxides from surfaces and prevents formation of oxides during soldering. b} To act as a lubricant to aid the flow of the solder. c} Acid cleans printed circuit connections. d} To cool the soldered connection. |
a} Removes oxides from surfaces and prevents formation of oxides
during soldering. |
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26] Which of these will be useful for insulation at UHF?
a} Rubber. b} Mica. c} Wax impregnated paper. d} Lead. |
b} Mica.
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27] The condition of a lead-acid storage battery is
determined with a(n): a} Hygrometer. b} Manometer. c} FET. d} Hydrometer. |
d} Hydrometer.
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28] Lines drawn from the VOR station in a particular
magnetic direction are : a} Radials. b} Quadrants. c} Bearings. d} Headings. |
a} Radials.
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29] The horizontal dipole VOR transmit antenna rotates at
____ revolutions per second. a} 60. b} 2400. c} 30. d} 1800. |
c} 30.
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30] The direction from the aircraft's nose to the VOR
station is referred to as the : a} Heading. b} Bearing. c} Deflection. d} Inclination. |
b} Bearing.
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31] All directions associated with a VOR station are related
to: a} North pole. b} North star. c} Magnetic north. d} None of these. |
c} Magnetic north.
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32] If a shunt motor, running with a load, has its shunt
field opened, how would this affect the speed of the motor? a} Slow down. b} Stop suddenly. c} Speed up. d} Unaffected. |
c} Speed up.
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33] On runway approach, an ILS Localizer shows :
a} Deviation left or right of runway center line. b} Deviation up and down from ground speed. c} Deviation percentage from authorized ground speed. d} Wind speed along runway. |
a} Deviation left or right of runway center line.
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34] What radio navigation aid determines the distance from
an aircraft to a selected VORTAC station by measuring the length of time the radio signal takes to travel to and from the station? a} Radar. b} Loran C. c} Distance Marking (DM). d} Distance Measuring Equipment (DME). |
d} Distance Measuring Equipment (DME).
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35] Which of the following is a feature of an Instrument
Landing System (ILS)? a} Localizer: shows aircraft deviation horizontally from center of runway. b} Altimeter: shows aircraft height above sea-level. c} VHF Communications: provide communications to aircraft. d} Distance Measuring Equipment: shows aircraft distance to VORTAC station. |
a} Localizer: shows aircraft deviation horizontally from center
of runway. |
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36] Why do we tin component leads?
a} It helps to oxidize the wires. b} Prevents rusting of circuit board. c} Decreases heating time and aids in connection. d} Provides ample wetting for good connection. |
c} Decreases heating time and aids in connection.
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37] What is the purpose of using a small amount of solder on
the tip of a soldering iron just prior to making a connection? a} Removes oxidation. b} Burns up flux. c} Increases solder temperature. d} Aids in wetting the wires. |
d} Aids in wetting the wires.
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38] What occurs if the load is removed from an operating
series DC motor? a} It will stop running. b} Speed will increase slightly. c} No change occurs. d} It will accelerate until it flies apart. |
d} It will accelerate until it flies apart.
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39] Why are concentric transmission lines sometimes filled
with nitrogen? a} Reduces resistance at high frequencies. b} Prevent water damage underground. c} Keep moisture out and prevent oxidation. d} Reduce microwave line losses. |
c} Keep moisture out and prevent oxidation.
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40] Nitrogen is placed in transmission lines to :
a} Improve the "skin-effect" of microwaves. b} Reduce arcing in the line. c} Reduce the standing wave ratio of the line. d} Prevent moisture from entering the line. Subelement 3B -- Radio wave propagation |
d} Prevent moisture from entering the line.
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