Strength Of Materials

1. The average crushing strength of hand moulded bricks is 6000 t/m2

2. The average tensile strength of hand moulded brick is 200 t/m2
3. The average shearing strength of hand moulded brick is 600 t/m2
4. Red short iron cracks when bent due to the presence of. A. sulphur
5. Slaked lime contains calcium hydroxide B. Quick lime contains calcium
oxide C. Slaked lime may be obtained from quick lime
6. Dorry's testing machine is used for. B. hardness test of stone
7. Piece of timber : Bauk = c/s 5 cmx20cm stip = c/s 5x10 board=width
5,thickess 12 plankk= 5x5 Batten =doesn't exceed 5
8. Slenderness Ratio of Column :- 1) For Short Column < 32 2) For Medium
Column 32 < S.R < 120 3) For Long Column > 120
9. Fatigue :- Decreased resistance of material to repeated reversals of stress
Creep :- Material continues to deform with time under sustained loading
Plasticity :- Material continues to deform without any further increase in
stress. Endurance limit :-Material has a high probability of not falling
under reversals of stress of magnitude below this level
10.The materials which have the same elastic properties in all directions, are
called. A. isotropic
11.A three hinged arch is carrying uniformly distributed load over the entire
span. The arch is free from shear force and bending moment if its shape is B.
parabolic [Correct Answer]
12.Three hinged arch is C. statically determinate
13.A linear arch has A. normal thrust only
14.A beam is said to be of uniform strength, if. C. bending stress is same
throughout the beam [Correct Answer]
15.As compared to uniaxial tension or compression, the strain energy stored in
bending is only C. 1/3 [Correct Answer]
16.In a three hinged arch, the linear and the actual arch meet at A. at least
three points
17.The effect of arching a beam is A. to reduce bending moment throughout
18.The ratio of the effective length of a column and minimum radius of
gyration of its cross-sectional area, is known. B. slenderness ratio [Correct
Answer]
19.Along the principal plan subjected to maximum principal stress. C. no
shear stress acts [Correct Answer]
20.. The hoop stress inducal in a thick cylinder due to radial pressure will be A.
Tensile
21.Buckling load for a given column depends upon C. both length and least
lateral dimension [Correct Answer]
22.The maximum shear strain occurs on B. 45° with principal planes [Correct
Answer]
23.. The shape of the bending moment diagram over the length of a beam,
carrying a uniformly increasing load, is always. C. cubical [Correct
Answer]
24.The section modulus of a rectangular section is proportional to. A. area of
the section
25.If the length of a simply supported beam carrying a concentrated load at the
centre is doubled, the defection at the centre will become C. eight times
[Correct Answer]
26.Along the neutral axis of a simply supported beam. A. fibres do not
undergo strain
27.The rate of change of bending moment is equal to rate of shear force
28.The rate of change of shear force is equal to rate of loading
29.Stress in members of statically determinate simple frames, can be
determined by. A. method of joints B. method of sections C. graphical
solution
30.. For no torsion, the plane of bending should B. pass through shear centre
of section [Correct Answer]
31.The maximum bending moment due to a moving load on a simply supported
beam, occurs. C. under the load [Correct Answer]
32.A three-hinged arch is said to be : A. statically determinate structure
33.Of the several prismatic beams of equal lengths, the strongest in flexure is
the one having maximum B. section modulus [Correct Answer]
34.The variation of the bending moment in the portion of a beam carrying
linearly varying load is C. cubic [Correct Answer]
35.The maximum bending moment due to a moving load on a fixed ended beam
occurs A. at a support
36.A prismatic beam fixed at both ends carries a uniformly distributed load.
The ratio of bending moment at the supports to the bending moment at mid-
span is D. 2.0 [Correct Answer]
37.According to Rankine's hypothesis, the criterion of failure of a brittle
material is A. maximum principal stress
38.The sum of normal stresses is A. constant
39.Shear stress on principal planes is A. zero
40.In a particular material, if the modulus of rigidity is equal to the bulk
modulus, then the Poisson's ratio will be A. 1/8
41.The maximum shear stress is equal to the C. Half of the difference of the
principal stresses [Correct Answer]
42.The effective length of a fillet weld designed to transmit axial load shall not
be less than B. 4 x size of weld [Correct Answer]
43.Material Poisson's ratio clay 0.30–0.45 stainless steel 0.30–0.31 steel 0.27–
0.30 cast iron 0.21–0.26 concrete 0.1-0.2
44.Weakest section in a fillet weld is A. throat of the fillet
45.The property of a material enabling it to resist deformation under stress is
called B. Stiffness [Correct Answer]
46.Effective length of a weld is equal to C. overall length - 2 x weld size
[Correct Answer]
47.Size of a right angled fillet weld is given by B. 0.414 x throat thickness
[Correct Answer]
48.Ability of a material to deform permanently under compression without
breaking is called A. Malleability
49.Limiting values of Poisson's ratio are A. - 1 and 0.5
50.Inclined loads generally cause A. Thrust in the beam
51.. The range within which a load can be applied on a rectangular column, to
avoid any tensile stress, is. B. one-fifth of the base [Correct Answer]
52.The deflection of any rectangular beam simply supported, is. C. inversely
proportional to the cube of its depth [Correct Answer]
53.For structural analysis of forces, the method refers to. A. moment-area-
theorem
54.The point of contratlexure occurs in case of B. Overhanging beams only
[Correct Answer]
55.If a material has identical properties in all directions, it is said to be B.
Isotropic [Correct Answer]
56.Rankine gold formula holds good for all type of columns. But Euler
formulas holds goods for only Long columns..
57.The plane which is not subjected to shear stress (tangential stress) is known
as B. Principal plane [Correct Answer]
58.The compression test is mainly done for testing A. Brittleness of the
material
59.For non-dilatant materials, the maximum value of Poisson's ratio is B. 0.55
[Correct Answer]
60.The ratio of maximum deflection of a beam to its span is called C. Stiffness
of the beam [Correct Answer]
61.The sum of the normal stresses is B. Invariant [Correct Answer]
62.The rate of change of bending moment is equal to A. Shear force
63.Energy stored per unit volume in a stretched wire is D. 1/2 Stress x Strain
[Correct Answer]
64.The minimum number of rivets for the connection of a gusset plate, is B. 2
[Correct Answer]
65.The deflection of the beam may be reduced by C. Providing greater end
restrains [Correct Answer]
66.The shear force on a simply supported beam is proportional to. D. algebraic
sum of the transverse forces of the section [Correct Answer]
67.The maximum resistance against rotation, is offered by the weld at a point.
A. most distant [Correct Answer]
68.The shear stress on principal plane is C. Zero [Correct Answer]
69.The S. I. unit of torque is B. Newton-metre [Correct Answer]
70.The tension coefficient of any member is. B. tension divided by the length
[Correct Answer]
71.For structural analysis, Maxwell's reciprocal theorem can be applied to : B.
elastic structures [Correct Answer]
72.During a tensile test on a ductile material. B. true stress at fracture is
higher than the ultimate stress [Correct Answer]
73.. If the width of a simply supported beam carrying an isolated load at its
centre is doubled, the deflection of the beam at the centre is changed by. C. 8
times [Correct Answer]
74.The distance between the centres of adjacent rivets in the same row, is
called. A. pitch [Correct Answer]
75.. The value of Poisson's ratio always remains. B. less than one [Correct
Answer]
76.The maximum twisting moment a shaft can resist, is the product of the
permissible shear stress and. C. polar modulus [Correct Answer]
77.The Poisson's ratio cannot have the value A. 0.7
78.The steel used for cutting tools is known as B. High carbon steel [Correct
Answer]
79.A cylinder is said to be thin if the ratio of its thickness and diameter, is less
than D. 1/10 [Correct Answer]
80.A bending moment may be defined as. C. Algebraic sum of the moments
of all the forces on either side of the section [Correct Answer]
81.The ratio of the Young's modulus to the bulk modulus is A. More than one
third
82.Strain energy of a member may be equated to. D. 1/2 (stress)2 x volume of
the member + Young's modulus E. [Correct Answer]
83.A diagram which shows the variations of the axial load for all sections of the
span of a beam, is called. C. thrust diagram [Correct Answer]
84.To ascertain the maximum permissible eccentricity of loads on circular
columns, the rule generally followed, is. C. middle fourth rule of columns
[Correct Answer]
85.Ties are load carrying members of a frame, which are subjected to. B. axial
tension loads [Correct Answer]
86.The moment diagram for a cantilever carrying linearly varying load from
zero at its free end and to maximum at the fixed end will be a. D. cubic
parabola. [Correct Answer]
87.The shape of the bending moment diagram over the length of a beam, having
no external load, is always. A. linear
88.The shape of the bending moment diagram over the length of a beam,
carrying a uniformly distributed load is always. B. parabolic [Correct
Answer]
89.The type of butt joints in common use, is : A. single inverted V-butt joint
90.The Young's modulus of a wire is numerically equal to the stress which will
B. Double the length of the wire [Correct Answer]