WorksheetsStructural Mechanics
Total questions: 65
Worksheet time: 2hrs 10mins
1. Strain is defined as
load per unit deformation
deformation per unit load
deformation per unit length
deformation per unit area
According to Hooke’s law, the ratio of stress and strain is known as
Modulus of Elasticity
Young’s Modulus
Both (a) & (b)
None of these
The property of materials of returning to their original position.er removal of external load is known as
Plasticity
Elasticity
Malleability
Ductility
The relation between number of joints (j) and number of members (n) in a perfect frame is
n = 2j - 3
j = n
j = 2n - 3
n = 3j
There will be no tension in the masonry of a dam at its base if (b is the base, e is the eccentricity)
e < 6b
e < 7b
e = b
e ≤ b/6
The bending moment on a section is maximum where shear force is
zero
minimum
maximum
changes sign
Rankine’s formula is an empirical formula used for
a. b. c. d.
Long Columns
Both long and short columns
Short column
None of these
Gauge length is the
length of test specimen
deformed length
length over which deformation is measured
total length
Stress-strain curve is always a straight line for
elastic materials
materials obeying Hooke’s law
elasto-plastic material
None of these
The property of a material by virtue of which a body returns to its original shape after removal of load is known as
Ductility
Plasticity
Resilience
Elasticity
When a beam is loaded with concentrated loads, the bending moment diagram will be
horizontal straight line
vertical straight line
inclined straight line
parabolic curve
Slope and deflection at the free end of a cantilever beam, carrying udl over whole span is
maximum
minimum
equal
zero
A beam having more than two supports is called
fixed beam
continuous beam
overhanging beam
simply supported beam
Modulus of section for a rectangular section is
bd2/6
bd3/6
bd2/12
bd3/12
A rectangular beam of length ‘l’ supported at its two ends carries a central point load ‘W’, the maximum deflection occurs at
the centre
1/3 from both ends
the ends
None of these
Unit of slenderness ratio is
mm
kN
N/mm2
None of these
Which of the following is true for Poisson’s ratio μ?
0 < μ < -1/2
1 < μ < 0
1 < μ < -1
None of these
For bars of composite section
the load carried by different materials is the same as the total external load
the total external load is equal to the total sum of the loads carried by different materials
Strain is equal in all materials
Both (b) and (c)
The equivalent length of a column having length ‘L’ and supported firmly (fixed) at both ends is
0.5L
2L
0.7L
L
As compared to actual length ‘l’ of a column hinged at both ends, its effective length ‘L’ should be
L = l
L = 2l
L = l/2
L = l/√2
If the number of members provided is more than the requirement, then the frame will be classified as
perfect frame
redundant frame
deficient frame
portal frame
A cantilever beam of length ‘l’ carries a uniformly distributed load ‘w’ per unit length over the whole length. The downward deflection at the free end will be ……………..
A ……………….. dam as compared to a rectangular dam is economical and easier to construct.
(a)
Resistance per unit area to deformation is known as ……………..
(a)
If the axial force in truss member tends to pull or stretch its joint, it is called ……………..
(a)
A simply supported beam of length ‘L’, cross sectional area ‘A’ carrying a uniformly distributed load of ‘w’ over the whole span will have maximum bending moment of ……………
The sectional modulus for a circular section of diameter ‘d’ is …………….
The ratio of the effective length of a column and minimum radius of gyration of its cross-sectional area is known as ……………………..
(a)
The point of contraflexure occurs in case of ………………….. only.
The bending moment of the beam not accompanied by shear force is known as ……………
(a)
Neutral axis of a beam is the axis at which stress is ……………….
(a)
Slope is measured in ……………
(a)
A ……………. is constructed to retain earth in hilly areas.
(a)
The bending stress at neutral axis of a bent beam is ………………
(a)
The point of contraflexure in a beam is a point on the beam axis where bending moment changes …………
(a)
The slenderness ratio of short columns is less than ……….
(a)
A cantilever of length L carries a point load W at the free end. The downward deflection at the free end is …………
The SI unit of stress is …………….
To avoid tension at the base of a dam, maximum value of eccentricity is e less than or equal to b/6
True
False
Generally in a truss system, compressive parts are thicker than tensile parts.
True
False
Poisson’s ratio states that, within elastic limit, the stress is proportional to the strain.
True
False
The shear force and bending moment are always negative in case of simply supported beams.
True
False
In case of a cantilever beam, irrespective of the type of loading, the maximum BM and maximum SF will occur at the free end.
True
False
The point of contraflexure occurs only in cantilever beam.
True
False
Slope and deflection can be calculated using Macaulay’s method.
True
False
Long column fails by buckling.
True
False
The strength of a beam depends on section modulus.
True
False
The ratio of linear stress to the linear strain is called modulus of elasticity.
True
False
The deflected pattern or shape of the centre line of a beam is called elastic curve or deflection curve.
True
False
The stress intensity in any fibre is inversely proportional to the distance of the fibre from neutral axis.
True
False
Hooke’s law is valid within plastic limit.
True
False
Flitched beam means a beam of composite section consisting of wooden beam strengthened by mild steel plates
True
False
The flexural rigidity for the deflection of beams is expressed as 1/EI
True
False
The effective length of a column with both ends fixed is L/2
True
False
The effective length of a column with both ends hinged is
L/2
L
2L
L/√2
The effective length of a column with one end fixed, other end free is
L/√2
L/2
2L
L
The effective length of a column with one end fixed, other end free is L/√2
True
False
Write one line answer for Shear force
Write one line answer for Overhanging beam
Write one line answer for Buckling or Crippling load
Write one line answer for Slenderness ratio
Write one line answer for Poisson’s ratio
Write one line answer for Long column
Write one line answer for Composite sections
Write one line answer for Bulk Modulus
