Engineering :: Strength of Materials
131.
In a simply supported beam carrying a uniformly distributed load w per unit length, the point of contraflexure
A.
lies in the centre of the beam
B.
lies at the ends of the beam
C.
depends upon the length of beam
D.
does not exist
Answer: Option D
Explanation:
132.
When there is a sudden increase or decrease in shear force diagram between any two points, it indicates that there is a
A.
point load at the two points
B.
no loading between the two points
C.
uniformly distributed load between the two points
D.
uniformly varying load between the two points
Answer: Option A
Explanation:
133.
When the shear force diagram between any two points is an inclined straight line, it indicates that there is a uniformly varying load between the two points
Answer: Option A
Explanation:
134.
When the shear force diagram is a parabolic curve between two points, it indicates that there is a
A.
point load at the two points
B.
no loading between the two points
C.
uniformly distributed load between the two points
D.
uniformly varying load between the two points
Answer: Option D
Explanation:
135.
When there is no increase or decrease in shear force between two points, it indicates that there is no change in the bending moment between these points.
Answer: Option A
Explanation:
136.
Which of the following statement is correct?
A.
A continuous beam has only two supports at the ends
B.
A uniformly distributed load spreads uniformly over the whole length of a beam.
C.
The bending moment is maximum where whear force is maximum.
D.
The maximum bending moment of a simply supported beam of length l with a central point load W is W l/8.
Answer: Option B
Explanation:
137.
In a beam where shear force changes sign, the bending moment will be
A.
zero
B.
minimum
C.
maximum
D.
infinity
Answer: Option C
Explanation:
138.
The point of contraflexure occurs in
A.
cantilever beams
B.
simply supported beams
C.
overhanging beams
D.
fixed beams
Answer: Option C
Explanation:
139.
The bending moment at a section tends to bend or deflect the beam and the internal stresses resist its bending. The resistance offered by the internal stresses, to the bending, is called
A.
compressive stress
B.
shear stress
C.
bending stress
D.
elastic modulus
Answer: Option C
Explanation:
140.
The assumption, generally, made in the theory of simple bending is that
A.
the beam material is perfectly homogenous and isotropic
B.
the beam material is stressed within its elastic limit
C.
the plane sections before bending remain plane after bending
D.
all of the above
Answer: Option D
Explanation:
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