FOR ESSAYS GURU ONLY 45B

Question

Identify the kind of clause for the underlined section in the sentence below.

If the inland air is quite unstable , the sea-breeze front can act as a focus for a line of thunderstorms.

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In the atmosphere,  both temperature and pressure decrease with altitude  and have conflicting effects upon density.

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Whenever an airfoil is producing lift , the pressure on the lower surface of it is greater than that on the upper surface.

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Obstructions on the ground affect the flow of wind  and can be an unseen danger.

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When a thermal rises to an inversion, it disturbs the stable air above it and spreads out horizontally , thus depositing some of the aerosols at that level .

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Many aspects of an aircraft's configuration can affect its effective dihedral , but two major components are wing sweepback and the wing location with respect to the fuselage.

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Always be alert to the possibility of wind shear,  especially when flying in and around thunderstorms and frontal systems .

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The most basic flight control system designs are mechanical  and date back to early aircraft.

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Since the atmosphere always seeks equality , if there is an updraft, there must be a downdraft or drafts close to replace the upward flowing air.

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Modern high performance gliders are made from composite materials  and take advantage of highly refined aerodynamics and control systems.

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Early gliders were easy and inexpensive to build , and they played an important role in flight training.

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To assure that the lift generated is sufficient to counteract weight,  loading an aircraft beyond the manufacturer’s recommended weight must be avoided .

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The quality of training is very important and should be the first priority  when choosing a course of training .

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The reactions of the average person become impaired at an altitude of about 10,000 feet , but for some people impairment can occur at an altitude as low as 5,000 feet.

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Supercooled water freezes on impact with an aircraft.

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Some sailplanes are equipped with sustaining engines  to enable level flight even in light sink, or areas of descending air flow.

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Before trying an S-turn , make sure it would not interfere with other traffic along the ridge.

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The thickness of the atmosphere is limited ; therefore, the higher the altitude, the less air there is above.

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In aviation,  weather service is a combined effort  of the National Weather Service (NWS), Federal Aviation Administration (FAA), Department of Defense (DOD), other aviation groups, and individuals.

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The shape of the wing or rotor cannot be effective  unless it continually keeps “attacking” new air.

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The pilot should contact the Air Traffic Control Tower to receive a “special VFR” departure  when the weather is marginal .

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When compared to the radius of the earth , 3,438 nautical miles (NM), the vertical limit of the atmosphere represents a very small distance.

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Aircraft, such as balloons and weight-shift control, do not require weight and balance computations  because the load is suspended below the lifting mechanism.

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It is imperative not to wait too long  after the first indication that the thermal is decreasing for this maneuver.

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When aircraft mechanics are setting magnetos , they must consider both internal and external timing.

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When the magneto-timing pin is properly inserted approximately 7/8" into the distributor block,  the timing pin will "seat" against the distributor block.

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When a pilot initially enters Class C airspace,  he or she should contact approach control on the appropriate frequency .

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When an airport's rotating beacon operates during daylight hours,  it indicates the airport is operating under instrument flight rules (IFR).

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When the pilot is departing Class C airspace and Air Traffic Control (ATC) advises that radar service is terminated,  the transponder should be set to visual flight rules (VFR) code 1200.

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Aircraft over 12,500 pounds require pilots to have a “type rating”  while Light Sport Aircraft (LSA) only need a valid driver’s license .