Airframe & General Oral Exam (Jeppesen) Latest Update Exam Questions With 100% Correct answer
s | Verified |
What is the function of a vortex generator? - correct answer It is designed to delay of prevent
separation of the boundary layer.
What are the three axes of an airplane? - correct answer Longitudinal, lateral, and vertical.
What are the three primary flight controls of an aircraft? - correct answer The ailerons,
elevators, and rudder.
Name several secondary flight controls and describe their general purpose? - correct answer
Secondary flight controls consist of various types of trim tabs such as balance tabs, anti-servo
and servo tabs, and spring tabs. Their function is to assist the pilot in moving the controls and
to trim the aircraft to fly hands-off.
Name several types of auxiliary flight controls and describe their general purpose? - correct
answer The auxiliary flight controls consist of the various high-lift devices used during low-
speed flight such as leading and trailing edge flaps, slats, slots, speed brakes, etc.
What is a servo trim tab (3)? - correct answer (1) An auxiliary control thats (2) Positioned by
movement of a primary control and (3) Designed to create aerodynamic forces to help move
control surface.
What is a spring tab (2)? - correct answer (1) Auxiliary control which (2) aids in the movement
of a primary control at high speeds when control forces become too high.
What is a balance trim tab (3)? - correct answer (1) Auxiliary control that (2) creates
aerodynamic forces to move control surface and is (3) positioned by control rod connected to
fixed surface on same side as horn and tab
What are four most common types of high lift devices? - correct answer Leading and trailing
edge flaps, slats, and slots.
Describe some of the tools used to check control surface travel? - correct answer A universal
propeller protractor or special control surface protractor.
Name three mechanical methods by which flight control systems may be actuated. - correct
answer Cables, push-pull rods, and torque tubes.
What is a fairlead? - correct answer It is a device to prevent a cable from rubbing on the aircraft
structure.
What are the most likely places for a control cable to wear or break? - correct answer Where
the cables pass over pulleys or through fairleads.
What information is required before a cable rigging chart can be used? - correct answer The
ambient temperature and the cable size.
,Airframe & General Oral Exam (Jeppesen) Latest Update Exam Questions With 100% Correct answer
s | Verified |
What is the function of a cable tension regulator? - correct answer It automatically adjusts the
cable tension to compensate for expansion and contraction in the aircraft structure.
Describe the function of rotorcraft collective pitch control. - correct answer The collective
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. - correct answer The cyclic control tilts
the main rotor disc by changing the pitch angle of each rotor blade during its cycle of rotation,
which causes the helicopter to move in the direction the rotor tilts.
What mechanism is most commonly used to compensate for the torque produced by the main
rotor of a helicopter? - correct answer The tail (or anti-torque) rotor.
How is the amount of thrust produced by the tail rotor controlled? - correct answer By moving
the foot pedals.
Why should a control surface be locked when an aircraft is parked? - correct answer To prevent
damage from the wind.
What is the major type of damage to aluminum structures that is caused by exposure to the
weather? - correct answer Corrosion.
Name several method for forming sheet metal. - correct answer Bending (folding), bumping,
stretching, shrinking, and crimping.
What are the dimensions of a properly formed rivet head? - correct answer The head should be
1 & 1/2 times the shank diameter in width and 1/2 the shank diameter in height.
Describe the markings found on the heads of A, B, D, AD, and DD rivets? - correct answer A
rivets are plain, B rivets have a cross, D rivets have a raised dot, AD rivets have a dimple, and
DD rivets have a double dash.
What happens to the stem of a self-plugging (friction lock) rivet when the rivet is installed? -
correct answer The stem is pulled until it snaps off and the remaining projecting part is
trimmed flush with the head.
Name at least three types of self-plugging mechanical lock rivets. - correct answer CherryMAX,
CherryLOCK, OLYMPIC-LOK, and HuckLok.
What is the difference between the tools required to pull a CherryLOCK rivet and a CherryMAX
rivet? - correct answer CherryLock rivets require a tool for each different size and head shape,
while one pulling tool will set any size CherryMAX rivet.
Which of the five stresses is the most common cause of rivet failure? - correct answer Shear.
,Airframe & General Oral Exam (Jeppesen) Latest Update Exam Questions With 100% Correct answer
s | Verified |
If a 2024 rivet must be replaced with a 2117 rivet, how do you determine the size to be used? -
correct answer For 5/32" or smaller diameter, use the next larger size 2117 rivet, assuming that
the edge distance and spacing meet the minimum requirements.
Describe the process for determining the total length of a solid rivet for a particular installation.
- correct answer Add the grip length or add the 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? - correct answer Not less than two rivet diameters from the edge and not less than
three rivet diameters apart.
How can a mechanic determine whether the countersink for a flush rivet should be dimpled or
drilled? - correct answer By the thickness of the top sheet; thin sheets are dimpled while thick
sheets may be countersunk.
What action is taken to prevent cracks from forming while dimpling magnesium or some hard
sheet metals? - correct answer Hot dimpling equipment is used to preheat and soften 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? -
correct answer If the radius of the set is too small, the rivet head may be damaged, whereas a
set with an over-sized radius 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? - correct answer If a bucking bar is too large or heavy it may be difficult to control and
may cause damage to the surrounding structure, whereas a bucking bar that is too light will not
properly upset the rivet before work hardening occurs.
What procedures should be followed to properly remove a solid-shank rivet? - correct answer
Center punch the rivet and then drill just to the base of the rivet head with the same size or one
size smaller drill. Once drilled, use a pin punch to tip off the rivet head and drive the remaining
shank out of the hole while supporting the surrounding metal.
What are the two special calculations that must be made bending sheet metal? - correct
answer Bend allowance and setback.
What factors must be considered in order to determine setback? - correct answer The thickness
of the metal and the bend radius.
What is done to a corner where two bends intersect to prevent cracking? - correct answer
Relief holes are drilled in the corner.
What are the two reasons for installing a lightening hole in the sheet metal? - correct answer
Lightening holes reduce the weight and increase stiffness.
, Airframe & General Oral Exam (Jeppesen) Latest Update Exam Questions With 100% Correct answer
s | Verified |
Describe a joggle and explain its function. - correct answer A joggle is an offset formed at an
intersection of two 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 metal should be used? -
correct answer Always use metal of the same type and thickness as the original structure.
What are three forms of wood commonly used in aircraft construction? - correct answer Solid,
laminated, and plywood.
What type of wood should be used when splicing or reinforcing plywood webs? - correct
answer The same type of plywood as originally used.
Name at least four different types of defects found in wood? - correct answer Knots, checks,
splits, pitch pockets, cross grain, curly grain, decay, dry rot, etc..
Can a section of wood containing a hard knot be used? - correct answer Yes, within specified
limits.
What type of glue may have been used in older wooden aircraft construction that requires
careful inspection to detect deterioration? - correct answer Casein glue.
What are the three types of glue used in modern aircraft construction and repair? - correct
answer Resorcinol glue, Phenol-formaldehyde glue, and epoxy resin glue.
Is compression wood acceptable for structural repairs? - correct answer No.
Why should the various pieces of wood being joined be kept in the same room for at least 24
hours prior to joining? - correct answer 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? -
correct answer If the maximum open-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? - correct answer
Clamping forces air out of the joint, brings the wood surfaces 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. - correct answer Clamps,
nailing strips, power presses, brads, nails, and small screws.
What minimum curing temperature should be observed when joining wood with various
adhesives? - correct answer 70 degrees Fahrenheit or as specified by the glue manufacturer.
When inspecting wood structures, why might it be important to consider stains and discolored
area? - correct answer Stains and discoloration usually accompany decay and/or rot.
s | Verified |
What is the function of a vortex generator? - correct answer It is designed to delay of prevent
separation of the boundary layer.
What are the three axes of an airplane? - correct answer Longitudinal, lateral, and vertical.
What are the three primary flight controls of an aircraft? - correct answer The ailerons,
elevators, and rudder.
Name several secondary flight controls and describe their general purpose? - correct answer
Secondary flight controls consist of various types of trim tabs such as balance tabs, anti-servo
and servo tabs, and spring tabs. Their function is to assist the pilot in moving the controls and
to trim the aircraft to fly hands-off.
Name several types of auxiliary flight controls and describe their general purpose? - correct
answer The auxiliary flight controls consist of the various high-lift devices used during low-
speed flight such as leading and trailing edge flaps, slats, slots, speed brakes, etc.
What is a servo trim tab (3)? - correct answer (1) An auxiliary control thats (2) Positioned by
movement of a primary control and (3) Designed to create aerodynamic forces to help move
control surface.
What is a spring tab (2)? - correct answer (1) Auxiliary control which (2) aids in the movement
of a primary control at high speeds when control forces become too high.
What is a balance trim tab (3)? - correct answer (1) Auxiliary control that (2) creates
aerodynamic forces to move control surface and is (3) positioned by control rod connected to
fixed surface on same side as horn and tab
What are four most common types of high lift devices? - correct answer Leading and trailing
edge flaps, slats, and slots.
Describe some of the tools used to check control surface travel? - correct answer A universal
propeller protractor or special control surface protractor.
Name three mechanical methods by which flight control systems may be actuated. - correct
answer Cables, push-pull rods, and torque tubes.
What is a fairlead? - correct answer It is a device to prevent a cable from rubbing on the aircraft
structure.
What are the most likely places for a control cable to wear or break? - correct answer Where
the cables pass over pulleys or through fairleads.
What information is required before a cable rigging chart can be used? - correct answer The
ambient temperature and the cable size.
,Airframe & General Oral Exam (Jeppesen) Latest Update Exam Questions With 100% Correct answer
s | Verified |
What is the function of a cable tension regulator? - correct answer It automatically adjusts the
cable tension to compensate for expansion and contraction in the aircraft structure.
Describe the function of rotorcraft collective pitch control. - correct answer The collective
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. - correct answer The cyclic control tilts
the main rotor disc by changing the pitch angle of each rotor blade during its cycle of rotation,
which causes the helicopter to move in the direction the rotor tilts.
What mechanism is most commonly used to compensate for the torque produced by the main
rotor of a helicopter? - correct answer The tail (or anti-torque) rotor.
How is the amount of thrust produced by the tail rotor controlled? - correct answer By moving
the foot pedals.
Why should a control surface be locked when an aircraft is parked? - correct answer To prevent
damage from the wind.
What is the major type of damage to aluminum structures that is caused by exposure to the
weather? - correct answer Corrosion.
Name several method for forming sheet metal. - correct answer Bending (folding), bumping,
stretching, shrinking, and crimping.
What are the dimensions of a properly formed rivet head? - correct answer The head should be
1 & 1/2 times the shank diameter in width and 1/2 the shank diameter in height.
Describe the markings found on the heads of A, B, D, AD, and DD rivets? - correct answer A
rivets are plain, B rivets have a cross, D rivets have a raised dot, AD rivets have a dimple, and
DD rivets have a double dash.
What happens to the stem of a self-plugging (friction lock) rivet when the rivet is installed? -
correct answer The stem is pulled until it snaps off and the remaining projecting part is
trimmed flush with the head.
Name at least three types of self-plugging mechanical lock rivets. - correct answer CherryMAX,
CherryLOCK, OLYMPIC-LOK, and HuckLok.
What is the difference between the tools required to pull a CherryLOCK rivet and a CherryMAX
rivet? - correct answer CherryLock rivets require a tool for each different size and head shape,
while one pulling tool will set any size CherryMAX rivet.
Which of the five stresses is the most common cause of rivet failure? - correct answer Shear.
,Airframe & General Oral Exam (Jeppesen) Latest Update Exam Questions With 100% Correct answer
s | Verified |
If a 2024 rivet must be replaced with a 2117 rivet, how do you determine the size to be used? -
correct answer For 5/32" or smaller diameter, use the next larger size 2117 rivet, assuming that
the edge distance and spacing meet the minimum requirements.
Describe the process for determining the total length of a solid rivet for a particular installation.
- correct answer Add the grip length or add the 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? - correct answer Not less than two rivet diameters from the edge and not less than
three rivet diameters apart.
How can a mechanic determine whether the countersink for a flush rivet should be dimpled or
drilled? - correct answer By the thickness of the top sheet; thin sheets are dimpled while thick
sheets may be countersunk.
What action is taken to prevent cracks from forming while dimpling magnesium or some hard
sheet metals? - correct answer Hot dimpling equipment is used to preheat and soften 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? -
correct answer If the radius of the set is too small, the rivet head may be damaged, whereas a
set with an over-sized radius 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? - correct answer If a bucking bar is too large or heavy it may be difficult to control and
may cause damage to the surrounding structure, whereas a bucking bar that is too light will not
properly upset the rivet before work hardening occurs.
What procedures should be followed to properly remove a solid-shank rivet? - correct answer
Center punch the rivet and then drill just to the base of the rivet head with the same size or one
size smaller drill. Once drilled, use a pin punch to tip off the rivet head and drive the remaining
shank out of the hole while supporting the surrounding metal.
What are the two special calculations that must be made bending sheet metal? - correct
answer Bend allowance and setback.
What factors must be considered in order to determine setback? - correct answer The thickness
of the metal and the bend radius.
What is done to a corner where two bends intersect to prevent cracking? - correct answer
Relief holes are drilled in the corner.
What are the two reasons for installing a lightening hole in the sheet metal? - correct answer
Lightening holes reduce the weight and increase stiffness.
, Airframe & General Oral Exam (Jeppesen) Latest Update Exam Questions With 100% Correct answer
s | Verified |
Describe a joggle and explain its function. - correct answer A joggle is an offset formed at an
intersection of two 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 metal should be used? -
correct answer Always use metal of the same type and thickness as the original structure.
What are three forms of wood commonly used in aircraft construction? - correct answer Solid,
laminated, and plywood.
What type of wood should be used when splicing or reinforcing plywood webs? - correct
answer The same type of plywood as originally used.
Name at least four different types of defects found in wood? - correct answer Knots, checks,
splits, pitch pockets, cross grain, curly grain, decay, dry rot, etc..
Can a section of wood containing a hard knot be used? - correct answer Yes, within specified
limits.
What type of glue may have been used in older wooden aircraft construction that requires
careful inspection to detect deterioration? - correct answer Casein glue.
What are the three types of glue used in modern aircraft construction and repair? - correct
answer Resorcinol glue, Phenol-formaldehyde glue, and epoxy resin glue.
Is compression wood acceptable for structural repairs? - correct answer No.
Why should the various pieces of wood being joined be kept in the same room for at least 24
hours prior to joining? - correct answer 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? -
correct answer If the maximum open-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? - correct answer
Clamping forces air out of the joint, brings the wood surfaces 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. - correct answer Clamps,
nailing strips, power presses, brads, nails, and small screws.
What minimum curing temperature should be observed when joining wood with various
adhesives? - correct answer 70 degrees Fahrenheit or as specified by the glue manufacturer.
When inspecting wood structures, why might it be important to consider stains and discolored
area? - correct answer Stains and discoloration usually accompany decay and/or rot.
