FAA AIRFRAME

When a diode is checked for an open circuit or a short circuit, it should be. in the circuit. checked with a milliamp ammeter. disconnected from the circuit.

A piece of flat stock that is to be bent to a closed angle of 15° must be bent through an angle of. 165°. 105°. 90°.

In the combustion heater, combustion air system, what prevents too much air from entering the heaters as air pressure increases?. Either a combustion air relief valve or a differential pressure regulator. Only a differential pressure regulator can be used. Only a combustion air relief valve can be used.

Fuel jettisoning past the limits prescribed by Federal Aviation Regulations is usually prevented by. closely monitoring the fuel quantity and turning off the fuel dump switch (es). dump limit valves or a low-level circuit. standpipes in the fuel tanks.

The elevator channel of an autopilot controls the aircraft about which axis of rotation?. Roll. Longitudinal. Lateral.

Compression failures in wood aircraft structures are characterized by buckling of the fibers that appear as streaks on the surface. at right angles to the growth rings. parallel to the grain. at right angles to the grain.

The basic difference between an autosyn and a magnesyn indicating system is the. rotor. transmitter. receiver.

When operationally checking an autopilot system on the ground, after the aircraft's main power has been switched on, the autopilot should be engaged. only after the gyros come up to speed and the amplifier warms up. whenever the operator desires. for only a few minutes at a time.

Which of the following are fire precautions which must be observed when working on an oxygen system?. Display 'No Smoking' placards and keep all tools and oxygen servicing equipment free from oil or grease. Display 'No Smoking' placards and provide adequate fire-fighting equipment. Display 'No Smoking' placards, provide adequate fire-fighting equipment, keep all tools and oxygen servicing equipment free from oil or grease, and avoid checking aircraft radio on electrical systems.

A main difference between Lockbolt/Huckbolt tension and shear fasteners (other than their application) is in the. number of locking collar grooves. shape of the head. method of installation.

The evacuation of a vapor-cycle cooling system removes any water that may be present by. drawing out the liquid. raising the boiling point of the water and drawing out the vapor. lowering the boiling point of the water and drawing out the vapor.

What does a reciprocating engine manifold pressure gauge indicate when the engine is not operating?. Zero pressure. The differential between the manifold pressure and the atmospheric pressure. The existing atmospheric pressure.

Which of the following tests can determine an aviation gasoline's tendency to vapor lock?. Reid vapor pressure test. Octane vapor pressure test. True vapor pressure test.

What maintains normal windshield temperature control in an electrically heated windshield system?. Thermal overheat switches. Thermistors. Manually-controlled rheostat.

The lubber line on a directional gyro is used to. represent the nose of the aircraft. align the instrument glass in the case. represent the wings of the aircraft.

If an engine-driven hydraulic pump of the correct capacity fails to maintain normal system pressure during the operation of a cowl flap actuating unit, the probable cause is. mechanical interference to the movement of the cowl flap. a partial restriction in the inport of the selector valve. restriction in the pump outlet.

Repairs or splices involving stringers on the lower surface of stressed skin metal wings are usually. not permitted. permitted only if the damage does not exceed 6 inches in any direction. permitted but are normally more critical in reference to strength in tension than similar repairs to the upper surface.

Unless otherwise specified, the radius of a bend is the. inside radius of the metal being formed. inside radius plus one-half the thickness of the metal being formed. radius of the neutral axis plus one-half the thickness of the metal being formed.

How should the aviation mechanic determine the amount of oxygen in a portable, high-pressure cylinder?. Weigh the cylinder and its contents. Read the pressure gauge mounted on the cylinder. Measure the pressure at the mask.

Which of the following are generally characteristic of aramid fiber (Kevlar) composites?. High tensile strength and flexibility. High tensile strength and stiffness. Corrosive effect in contact with aluminum and ability to conduct electricity.

A carbon dioxide (CO(2)) hand-held fire extinguisher may be used on an electrical fire if the. horn is nonmetallic. handle is insulated. horn is nonmagnetic.

The fusible plugs installed in some aircraft wheels will. indicate tire tread separation. prevent overinflation. melt at a specified elevated temperature.

After cleaning or replacing the filtering element in a combustion heater fuel system, the system should be pressurized and. all connections checked for leaks. the fuel filter bypass valve reset to the filter position. a sample of fuel taken downstream from the filter to ensure proper operation of the new filtering element.

Fungicide and mildewicide additives are important for fabric covered aircraft, such as. cotton and dacron. cotton and linen. glass and linen.

What safety device is usually located between the driving unit and hydraulic pump drive shaft?. Thermal relief valve. Pump motor safety switch. Pump drive coupling shear section.

The purpose of a diaphragm in a vane-type fuel pump is to. equalize fuel pressure at all speeds. vary fuel pressure according to throttle setting. compensate fuel pressures to altitude changes.

A faint line running across the grain of a wood spar generally indicates. compression failure. shear failure. decay.

High pressure cylinders used to transport and store acetylene must. be pressure tested to 3,000 psi. be green in color. contain acetone.

The sight line on a sheet metal flat layout to be bent in a cornice or box brake is measured and marked. one-half radius from either bend tangent line. one radius from either bend tangent line. one radius from the bend tangent line that is placed under the brake.

What is the minimum edge distance for aircraft rivets?. Two times the diameter of the rivet shank. Two times the diameter of the rivet head. Three times the diameter of the rivet shank.

How many fabric thicknesses will be found in a French-fell seam?. Five. Three. Four.

What are the components used to heat water supply lines and waste water tanks?. Heater blankets and inline heaters. Combustion heaters and fuel heaters. Heater boots and combustion heaters.

Where would the aviation mechanic find the recommended statement for recording the approval or disapproval for return to service of an aircraft after a 100-hour or annual inspection?. 14 CFR Part 65. 14 CFR Part 43. 14 CFR Part 91.

The angle-of-attack detector operates from differential pressure when the airstream. is parallel to the longitudinal axis of the aircraft. is not parallel to the true angle of attack of the aircraft. is parallel to the angle of attack of the aircraft.

Which of the following drill bit types work best when drilling an aramid fiber (Kevlar) composite laminate?. Tool steel with standard grind. Diamond dust coated. Carbide W-point.