# Aircraft Structure – II

Aircraft structure is a mechanic, structures; assembler-installer, sturctures; structures assembler Assembles tail, wing, fuselage, or other structural section of aircraft, space vehicles, and missiles from parts, subassemblies, and components, such as frames, bulkheads, doors, stabilizers, and landing gear, following blueprints and specifications, using handtools, power tools, and measuring instruments.

Which of the machine component is designed under bending stress?
Unsymmetrical bending is said to occur when
For bending equation to be valid, radius of curvature of the beam after bending should be
Neutral axis of a beam always coincides with
Moment of resistance of a beam
Section modulus of a beam is always given by formula
Moment of Inertia of a rectangular section about any axis=
Two beams have same length and same weight and same material. One beam has solid circular section and other hollow circular section with outside diameter/inside diameter ratio=K and having moment of resistance=M, then
If depth of a beam is doubled then changes in its section modulus
Centroid of a section is
Principal planes are those planes on which
Moment of inertia of a section is
In a general two dimensional stress system, there are
Angle of obliquity is defined as
Ellipse of stress is used to find
Principal planes are mutually inclined at
In Mohr’s circle of strain, y-axis represents
In a general two dimensional stress system, the planes on which shear stress is zero
In a general two dimensional stress system, planes of maximum shear stress are inclined at ___ with principal planes.
Mohr’s stress circle is named so because it has equation of the form
In a general two dimensional stress system, Ellipse of stress can find
A cantilever is a beam whose
A beam is a structural member which is subjected to
What is net section rupture failure?
A sudden jump anywhere on the Bending moment diagram of a beam is caused by
For any part of a beam subjected to uniformly distributed load, Shear force diagram is
For any part of the beam, between two concentrated load Shear force diagram is a
In a cantilever carrying a uniformly varying load starting from zero at the free end, the shear force diagram is
In a simply supported beam, bending moment at the end
In a simple supported beam having length = l and subjected to a concentrated load (W) at mid-point.
For any part of a beam between two concentrated load, Bending moment diagram is a
-In a simply supported beam subjected to uniformly distributed load (w) over the entire length (l), total load=W, maximum Bending moment is
In a cantilever subjected to a concentrated load (W) at the free end and having length =l, Maximum bending moment is
An axle is subjected to loads as shown

Maximum bending moment is
In a cantilever subjected to a combination of concentrated load, uniformly distributed load and uniformly varying load, Maximum bending moment is
At a point in a simply supported or overhanging beam where Shear force changes sign and = 0, Bending moment is
Point of contra-flexure is a
Shear stress variation in a beam is
In a general two dimensional stress system, the planes on which shear stress is zero
Principal planes are mutually inclined at
Shear stress variation in a beam is
What is the maximum effective slenderness ratio for a member normally acting as a tie in roof truss or a bracing member?
The elastic buckling stress for thin flat plate of length L, depth d and thickness t simply supported along four edges and loaded by bending stress distribution is given by
The ratio of maximum shear stress to average shear stress in a beam of rectangular section is
Buckling occurs to members or elements mainly subjected to _______
The buckling coefficient for thin flat plate free along one longitudinal edge is given by
What is a semi-compact section?
What is slenderness ratio of a tension member?
What is the stiff bearing length?
The depth-to-thickness ratio of web when only transverse stiffeners are provided and c < 0.74d, where c is clear distance between stiffeners and d is depth of web is_____ to meet serviceability criteria
Which of the following relation is correct for plastic section modulus, Zo ?
What is the maximum effective slenderness ratio for members always in tension?
What is plastic moment of resistance?
The tensile stress adjacent to hole will be ____________
The strength of tensile members is not influenced by :
The effective length of intermediate transverse stiffener is taken as
The effective length of web on each side of centreline of stiffeners for interior stiffeners is limited to
Clip angle connection are designed to
Determine block shear strength of tension member shown in figure if grade of steel is Fe410.

In bolted moment end plate connection, bending moment , axial force and shear force are transferred by
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