Shet mets

Question 1

What type of stress tries to pull a material apart?

Answer 1

Tension

Question 2

Which stress results from forces trying to squeeze a material together?

Answer 2

Compression

Question 3

Torsion is best described as:

Answer 3

A twisting force around an axis

Question 4

When a beam experiences compression and tension, it is under what type of stress?

Answer 4

Bending

Question 5

Shear stress occurs when:

Answer 5

Two opposing forces act parallel to each other

Question 6

Which type of stress does a wing spar experience during flight?

Answer 6

Tension and compression

Question 7

Which of the following parts of an aircraft structure is most affected by torsional stress?

Answer 7

The propeller shafts

Question 8

The downward force of gravity and the upward force of lift create what type of stress on the wings?

Answer 8

Bending

Question 9

What type of tool is commonly used to cut sheet metal in straight or curved lines?

Answer 9

Aviation snips

Question 10

The purpose of a deburring tool in sheet metal repair is to:

Answer 10

Remove sharp edges from drilled holes

Question 11

A riveting hammer is used for:

Answer 11

Driving and forming rivets

Question 12

What is the main purpose of a cleco fastener?

Answer 12

Hold sheet metal pieces together temporarily

Question 13

Which of the following is a pneumatic tool commonly used in sheet metal work?

Answer 13

Rivet gun

Question 14

The function of a countersink tool is to:

Answer 14

Create a conical depression for flush rivets

Question 15

Which tool is used to mark centerlines on sheet metal before drilling?

Answer 15

Center punch

Question 16

A rivet set is used in conjunction with a:

Answer 16

Rivet gun

Question 17

What is the primary purpose of dimpling in rivet installation?

Answer 17

Create a flush rivet surface

Question 18

What is the correct drill size for a 1/8-inch diameter rivet?

Answer 18

30

Question 19

A step drill bit is used for:

Answer 19

Drilling multiple hole sizes in one bit

Question 20

What type of drill is commonly used in aviation sheet metal work?

Answer 20

Pneumatic drill

Question 21

A reamer is used to:

Answer 21

Expand an existing hole for precision fit

Question 22

Which of the following is a layout tool used in sheet metal work?

Answer 22

Dividers

Question 23

What is the primary function of a scribe?

Answer 23

Mark precise lines on sheet metal

Question 24

Which tool is used to hold the head of a rivet in place while it is being driven?

Answer 24

Rivet gun

Question 25

What is the main purpose of a rivet gun?

Answer 25

Drive and set rivets

Question 26

A rivet set is a specialized tool used to:

Answer 26

Form the head of a rivet during installation

Question 27

When installing a rivet, what tool is used to temporarily hold workpieces together before final riveting?

Answer 27

Cleco fastener

Question 28

What is the primary function of a box and pan brake?

Answer 28

Form boxes and pans by bending multiple edges

Question 29

What is the purpose of a slip roll former?

Answer 29

Form cylindrical or curved shapes in sheet metal

Question 30

A press brake is commonly used to:

Answer 30

Form sharp, precise bends in thick sheet metal

Question 31

What is the primary reason aluminum is alloyed with other metals for aircraft construction?

Answer 31

To enhance its strength while maintaining a low weight

Question 32

How are aluminum alloys classified?

Answer 32

By their major alloying ingredient

Question 33

What is the primary purpose of heat treatment in metals?

Answer 33

To improve its strength, hardness, or ductility for a specific purpose

Question 34

Why are aluminum alloys stronger than pure aluminum?

Answer 34

Alloying elements bond with aluminum molecules, resisting deformation under stress.

Question 35

What is the primary purpose of annealing aluminum alloys?

Answer 35

To soften the metal and decrease internal stress

Question 36

What are the two main groups of structural fasteners discussed in the text?

Answer 36

Solid shank rivets and blind rivets

Question 37

What is the primary advantage of using solid shank rivets in aircraft construction?

Answer 37

They provide high shear strength and are cost-effective

Question 38

What is the function of the bucktail in a solid shank rivet?

Answer 38

It forms the second head when the rivet is installed

Question 39

Why are riveted joints not airtight or watertight by default?

Answer 39

Because special seals or coatings are required

Question 40

What is the standard angle for a countersunk rivet head?

Answer 40

100°

Question 41

What factor determines the selection of rivet size for a specific aircraft component?

Answer 41

The thickness of the material being joined

Question 42

What is the minimum edge distance for a universal head rivet?

Answer 42

2.5 times the rivet diameter

Question 43

What is the purpose of transverse pitch in a rivet layout?

Answer 43

To ensure rivets are evenly spaced in different rows

Question 44

What is the first step in transferring a hole from one part to another?

Answer 44

Using a center punch

Question 45

What should be done before drilling a rivet hole?

Answer 45

Center punch the rivet location

Question 46

What is the purpose of using a pilot hole before final drilling?

Answer 46

To remove burrs before riveting

Question 47

What should be done if a drilled rivet hole has burrs?

Answer 47

Remove them with a burr remover or a larger drill bit

Question 48

What is the main role of a bucking bar in riveting?

Answer 48

To support the sheet metal and prevent denting

Question 49

When should an inspection of rivets take place?

Answer 49

Before driving the rivets into place

Question 50

What is a sign of a failed rivet in shear?

Answer 50

The rivet is flush with the surface

Question 51

What is the best method for removing a universal rivet?

Answer 51

File a flat surface, center punch, and drill the head before punching out the shank

Question 52

What should be done if a rivet hole becomes enlarged or damaged?

Answer 52

Replace the rivet with one of the next larger size

Question 53

What is the main reason solid shank rivets have been preferred for metal aircraft construction?

Answer 53

They fill up the hole, resulting in good load transfer

Question 54

What is a key disadvantage of friction-locked blind rivets compared to mechanical-lock blind rivets?

Answer 54

They require more specialized tools for installation

Question 55

What feature of mechanical-lock blind rivets prevents the center stem from falling out?

Answer 55

A hollow sleeve that absorbs vibration

Question 56

What is the primary advantage of CherryMAX® blind rivets?

Answer 56

They can replace solid shank rivets size for size

Question 57

How is a Hi-Lok® fastener installed to ensure proper torque?

Answer 57

By tightening the collar until it shears off at a predetermined preload

Question 58

What is the key difference between Hi-Tigue® fasteners and Hi-Lok® fasteners?

Answer 58

Hi-Tigue® fasteners have a special bead design for enhanced fatigue performance

Question 59

What is the main advantage of the CherryBUCK® fastener compared to two-piece shear fasteners?

Answer 59

It eliminates foreign object damage (FOD)

Question 60

What are the three types of lockbolts commonly used?

Answer 60

Pull-type, stump-type, blind-type

Question 61

Which of the following is NOT a characteristic of lockbolts?

Answer 61

They are easy to remove after installation

Question 62

What is the main function of the collar in a lockbolt system?

Answer 62

To lock the pin in place

Question 63

Which tool is required to install Cherry Maxibolt® blind bolts?

Answer 63

Special installation tools such as the Cherry® G83, G84, or G704

Question 64

Why are blind bolts used in aircraft structures?

Answer 64

They have a higher strength than blind rivets

Question 65

What is the primary purpose of a Rivet Nut?

Answer 65

To provide a blind-installed, internally threaded hole