FAA Airframe Oral (2024 latest update fully solved & verified for accuracy(already graded A+)

What is the function of a vortex generator it is used to delay or prevent the separation of the boundary layer What are the 3 axes of an airplane longitudinal, lateral and vertical Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:15 Full screen What are the 3 primary flight controls of an aircraft ailerons, rudder, elevator Name several secondary flight controls and describe their general purpose secondary flight controls consist of various types of trim tabs, such as balance tabs, anti-servo tabs, servo tabs and spring tabs. Their general purpose is to assist the pilot in moving the controls and to trim the aircraft for hands off flying Name several types of auxiliary flight controls and describe their general purpose The auxiliary flight controls consist of various high lift devices used during low speed flight such as leading and trailing edge flaps, slat, slots, speed brakes, etc. What is a servo trim tabs it is an auxiliary control, positioned by the movement of a cockpit control and designed to create aerodynamic forces to assist in moving a control surface What is a spring tab it is an auxiliary control designed to aid the movement of a primary control at high speeds when control forces become too high What is a balance trim tab it is an auxiliary control designed to create aerodynamic forces to assist in moving a control surface. The tab is positioned by a control rod connected to a fixed surface on the same side as the horn of the tab What are the 4 most common high lift devices Leading and trailing edge flaps, slats and slots Describe some of the tools used to check control surface travel a universal propeller protractor or a special control surface protractor Name 3 mechanical methods in which control surfaces may be actuated cables, torque tubes and push pull rods What is a fairlead it is a device to prevent a cable from rubbing on aircraft structure What are the most likely places for a control cable to wear or break where a cable passes over a pulleys or through fairleads What information is required before a cable rigging chart can be used the ambient temperature and the cable size What is the function of a cable tension regulator it automatically adjusts to compensate for expansion and retraction in the aircraft structure Describe the function of a rotorcraft collective pitch control The collective pitch control causes each rotor blade to change its pitch angle by the same amount, thus increasing or decreasing the lift produced by the rotor Describe the function of a rotorcraft cyclic pitch control The cyclic control tilts the main rotor disk by changing the pitch angle of each rotor blade during its cycle of rotation which cause the helicopter to move in the direction the rotor disk tilts What mechanism is commonly used to compensate for the torque produced by the main rotor of a helicopter the tail or anti torque rotor why should control surfaces be locked when an aircraft is parked to prevent damage from the wind How is the amount of thrust produced by the tail rotor controlled by moving the foot pedals What is the major type of damage to aluminum that is caused by exposure to the weather corrosion name several methods for forming sheet metal bending or folding, stretching, shrinking, bumping, crimping what are the dimensions of a properly formed rivet head The head should be 1.5 times the shank diameter in width and .5 the shank diameter in height Describe the markings found on the heads of A, B, D, AD, and DD rivets A - plain B - cross D - raised dot AD - a dimple DD - double dash What happens to the stem of a self plugging (friction lock) rivet when the rivet is installed the stem is pulled until it snaps off and the remaining part is trimmed flush with the head Name at least 3 types of self plugging mechanical lock rivets CherryMAX, CherryLOCK, Olympic-LOK, HuckLok What is the difference between the tools required to pull a CherryLOCK rivet and a CherryMAX rivet CherryLOCK rivets require a tool for each different size and head shape, while 1 pulling tool will set any size CherryMAX rivet Which of the 5 stresses is most likely to cause rivet failure shear If a 2024 rivet must be replaced with a 2117 rivet how do you determine the size to be used for 5/32 inch or smaller diameter use the next larger size 2117 rivet, assuming the edge distance and spacing meet the minimum requirements Describe the process for determining the total length of a solid rived for a particular installation add the grip length (thickness of the materials being joined) plus 1.5 times the rivet diameter What minimum edge distance and spacing should be used for a single row of protruding head rivets not less than 2 rivet diameters from the edge and not less than 3 rivet diameters apart How can a mechanic determine whether the countersink for a flush rivet should be dimpled or drilled by the thickness of the top sheet; thin sheets are dimpled, thick sheets may be drilled What action is taken to prevent cracks from forming while dimpling magnesium or some hard metals hot dimpling equipment is used to preheat and soften the metal before the metal before the dimple is formed What type of damage can occur when using a rivet set that does not properly fit the rivet If the radius of the set is too small, damage to the rivet head may occur; if the set is too big, it may cause damage to the sheet metal Why is it important to use the proper size and weight bucking bar when performing sheet metal riveting if the bucking bar is too large or heavy it may be difficult to control and may cause damage to surrounding structure, whereas is the bucking bar is too light, it will not properly upset the rivet before work hardening occurs What procedures should be followed to properly remove a solid shank rivet center punch the rivet, drill to the base of the head with the same size or 1 size smaller drill bit, use a pin punch to remove rivet head and drive the shank out of the hole while supporting the surrounding metal What are the 2 special calculations that must be made when bending sheet metal bend allowance and setback What factors must be considered in order to determine setback the thickness of the metal and the bend radius what is done to a corner where 2 bends intersect to prevent cracking relief holes are drilled at the corner What are to reasons for installing a lightening hole in a sheet metal wing rib reduce weight and increase stiffness Describe a joggle and explain its function a joggle is an offset formed at an intersection of 2 or more sheets of metal to allow the multiple sheets to be stacked flat against each other When repairing an all metal aircraft, how do you determine what metals should be used always use metal of the same type and thickness as the original structure What are the 3 forms of wood commonly used in aircraft construction solid ,laminated and plywood What type of wood should be used when splicing or reinforcing plywood webs the same type of plywood as originally used Name at least 4 different types of defects found in wood knots, checks, splits, pitch pockets, cross grain, curly grain, decay, dry rot, etc. Can a section of wood containing a hard knot be used yes within specified limits what type of glue may have been used in older wooden aircraft construction that requires careful inspection to detect deterioration casein glue what are the 3 types of glues used in modern aircraft construction and repair resorcinol glue, phenol-formaldehyde glue, epoxy resin glue is compression wood acceptable for structural repairs no why should the various pieces of wood being joined be kept in the same room for at least 24 hours prior to joining to allow the moisture content to equalize, thereby minimizing dimensional changes in the wood Why is it important to consider the open assembly time when gluing wooden structures if the maximum ope assembly time is exceeded, the joint may fail since the glue may begin setting up before the joint is assembled why is it important to apply the proper clamping pressure to a glue joint clamping forces air out of the joint, brings the wood together evenly and is, in part, responsible for the strength of the glue line describe some of the methods used to apply pressure to glue joints clamps, nailing strips, power presses, brads, nails and small screws what minimum curing temperature should be observed when joining wood with various adhesives 70 degrees F or as specified by the glue