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Aviation > Quiz 1 > Flashcards

Quiz 1 Flashcards

1
Q

The purpose of wing slats is to?

A

Reduce stalling speed

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2
Q

The angle of incidence of an airplane…

A

Does not change in flight

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3
Q

When subsonic air flows into a converging duct, its density…

A

Remains the same

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4
Q

An airplane has a positive longitudinal static stability when its center of gravity is ________ the center of the lift

A

Ahead

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5
Q

In order to tilt the rotor disc of a helicopter forward, the pitch of the _______ blade is increased

A

Retreating

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6
Q

A piece of flat stock that is to be bent to a closed angle of 15 degrees must be bent through an angle of…

A

165 degrees

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7
Q

The shop head of a rivet should be

A

One and one half times the diameter of the river shank

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8
Q

What is generally the best procedure to use when removing a solid shank rivet

A

Drill to the base of the manufactured rivet head with a drill one size smaller than the rivet shank and remove the rivet with a punch.

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9
Q

Well designed rivet joint will subject the rivets to

A

Shear loads

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10
Q

A rivet set used to drive MS20470 rivets should

A

Have slightly greater radius than the rivet head

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11
Q

When repairing large, flat surfaces with polyester resins, warping of the surface is likely to occur. One, method of reducing the amount of warpage is to

A

Use short strips of fiberglass in the bonded repair

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12
Q

When making repairs to fiberglass, cleaning of the area to be repaired is essential for a good bond. The final cleaning should be made using

A

MEK (methyl ethyl ketone)

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13
Q

The classification for high tensile strength fiberglass used in aircraft structures is

A

S

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14
Q

The coefficient of expansion of most plastic enclosure material is

A

Greater than both steel and aluminum

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15
Q

The preferred way to make permanent repairs on composites is by

A

Laminating on new repair plies

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16
Q

Wing dihedral, a rigging consideration of most airplanes of conventional design, contributes mostly to stability of the airplane about its

A

Longitudinal axis

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17
Q

Rigging and alignment checks should not be undertaken in the open, however if this cannot be avoided the aircraft should be positioned

A

With the nose into the wind

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18
Q

Washing-in the left wing of the monoplane for purpose of rigging corrections after flight test, will have what effect on the lift and drag of that wing

A

Both drag and lift will increase due to in erased angle of attack

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19
Q

Movement about the longitudinal axis in a helicopter is effected by movement of the

A

Cyclic pitch control

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20
Q

With which system is differential control associated

A

Aileron

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21
Q

The sharpest bend that can be placed in a piece of metal without critically weakening the part is called

A

Minimum radius of bend

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22
Q

What is one of the determining factors which permits machine countersinking when flush riveting

A

Thickness of the material is greater than the thickness of the rivet head

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23
Q

The shop head of a rivet should be

A

One and one half times the diameter of the rivet shank

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24
Q

What type loads cause the most rivet failures

A

Shear

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25
Q

The center pressure remains in essentially the same location as the angle of attack changes on a/an_______ airfoil

A

Symmetrical

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26
Q

The dihedral angle of a wing may be measured by placing a straightedge and level protractor on the

A

Front spar

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27
Q

The correct dihedral angle can be determined by

A

Using a dihedral board and bubble level along the front spar of each wing

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28
Q

When subsonic air flows into a converging duct, it’s density

A

Remains the same

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29
Q

What physical factors are involved in the aspect ratio of airplane wings

A

Span and chord

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30
Q

What is the minimum spacing for a single row of aircraft rivets

A

Three times the diameter of the rivet shank

31
Q

Which rivet is used for riveting nickel- steel alloys

A

Monel

32
Q

Acetylene at a line pressure above 15 psi is

A

Dangerously unstable

33
Q

The most important factors needed to make a flat pattern layout are

A

Radius, thickness, and degree of bend

34
Q

A very thin and pointed tip on a soldering copper is undesirable because it will

A

Cool too rapidly

35
Q

Which properly applied finish topcoat is the most durable and chemical resistant

A

Polyurethane

36
Q

Fiberglass laminate damage that extends completely through one facing and into the core

A

Requires the replacement of the damage core and facing

37
Q

Which is an identifying characteristics of acrylic plastics

A

Zinc chloride will have no effect

38
Q

Sandwich panels made of metal honeycomb construction are used on modern aircraft because this type of construction

A

Has a high strength to weight ratio

39
Q

As the angle of attack of an airfoil increases, the center of pressure will

A

Move toward the leading edge

40
Q

If the control stick of an aircraft with properly rigged flight controls is moved forward and to the right, the left aileron will move

A

Down and the elevator will move down

41
Q

The purpose of spring tabs or servo tabs is to

A

Assist the pilot in moving the control surfaces

42
Q

Stability about the axis which runs parallel to the line of flight is referred to as

A

Lateral stability

43
Q

The elevators of a conventional airplane are used to provide rotation about the

A

Lateral axis

44
Q

Which statement best describes magnesium welding

A

Filler rod should be the same composition as base metal

45
Q

Engine mount members should preferably be repaired by using a

A

Larger diameter tube with fish mouth and rosette welds

46
Q

The monocoque fuselage relies largely on the strength of

A

Skin or covering

47
Q

The installation of Cherrymax and Olympic lok rivets is accomplished by utilizing

A

A pulling tool

48
Q

In gas welding, the amount of heat applied to the material being welded is controlled by the

A

Size of the tip opening

49
Q

Annealing of aluminum

A

Removes stresses caused by forming

50
Q

Filing or grinding a weld base

A

Reduces the strength of the joint

51
Q

Where is information found concerning acceptable species substitutions for wood materials used in aircraft repair

A

AC 43.13-1B

52
Q

Cylinders used to transport and store acetylene

A

Contain acetone

53
Q

If the right wing of a monoplane is improperly rigged to a greater angle of incidence than designated in the manufacture’s specifications, it will cause the

A

Airplane to be off balance both laterally and directionally

54
Q

The aerodynamic load on the tail of a longitudinally stable airplane acts

A

Downward

55
Q

Vortex generators mounted on the empennage of an airplane improve flight characteristics at _______ speed

A

Low

56
Q

The basic forces that act on an aircraft in flight are

A

Thrust, drag, weight, and lift

57
Q

What is one of the determining factors which permits machine countersinking when flush riveting

A

Thickness of the material is greater than the thickness of the rivet head

58
Q

A single lap sheet splice is to be used to repair a section of damaged aluminum skin. If a double row of 1/8- inch rivets is used, the minimum allowable overlap will be

A

13/16 inch

59
Q

The most important consideration when selecting welding rod is

A

Material compatibility

60
Q

A resurfaced soldering iron cannot be used effectively until after the working face has been

A

Tinned

61
Q

A category of plastic material that is capable of softening or flowing when reheated describes as a

A

Thermoplastic

62
Q

Which fiber to resin (percent) ratio for advanced composite wet lay-ups is generally considered the best for strength

A

60:40

63
Q

What is likely to occur if hydrated wash primer is applied to unpainted aluminum and then about 30-40 minutes later a finish topcoat, when the humidity is low

A

A glossy, blush-free finish

64
Q

Sandwich panels made of metal honeycomb construction are used on modern aircraft because this type of construction

A

Has a high strength to weight ratio

65
Q

Placing a piece of cloth around a stainless steel control cable and running it back and forth over the length of the cable is generally a satisfactory method of

A

Inspecting wires

66
Q

An airplane that had a tendency to gradually increase a pitching moment that has been set into motion has

A

Poor longitudinal stability

67
Q

The purpose in checking main rotor blade tracking is to determine the

A

Relative position of the blades during rotation

68
Q

The shielding gases generally used in the Gas Tungsten Arc (GTA) welding of aluminum consist of

A

Helium or argon, or a mixture of helium and argon

69
Q

The sharpest bend that can be placed in a piece of metal without critically weakening the part is called

A

Radius of bend

70
Q

Where should the flux be applied when oxyacetylene welding aluminum

A

Painted on the surface to be welded and applied to the welding

71
Q

In cases of elongated boltholes in a wood spar or cracks in the vicinity of boltholes

A

A new section of spar should be spliced in or the spar replaced entirely

72
Q

What reference tool is used to determine how the fiber is to be oriented for a particular ply of fabric

A

Warp clock or compass

73
Q

When patching a plywood skin, abrupt changes in cross-sectional areas which will develop dangerous stress concentration should be avoided by using

A

Circular or elliptical patches

Aviation (3 decks)

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