Q. For a fixed beam with a central point load, what is the maximum bending moment?
A.
PL/4
B.
PL/2
C.
PL
D.
0
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Solution
The maximum bending moment M for a fixed beam with a central point load P is given by M = PL/2.
Correct Answer:
B
— PL/2
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Q. For a simply supported beam with a span L and a point load P at one end, what is the reaction at the support opposite to the load?
A.
P/2
B.
P
C.
0
D.
P * (L/2)
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Solution
The reaction at the support opposite to the point load P at one end of a simply supported beam is R = P/2.
Correct Answer:
A
— P/2
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Q. In a beam subjected to a moment, what is the effect of increasing the moment of inertia (I) on the deflection?
A.
Increases deflection
B.
Decreases deflection
C.
No effect
D.
Increases stiffness
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Solution
Increasing the moment of inertia (I) of a beam decreases the deflection under a given load, thus increasing its stiffness.
Correct Answer:
B
— Decreases deflection
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Q. In the context of structural analysis, what does the term 'stiffness' refer to?
A.
Resistance to shear
B.
Resistance to bending
C.
Deformation per unit load
D.
Load per unit deflection
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Solution
In structural analysis, 'stiffness' refers to the load per unit deflection, indicating how much a structure deforms under a given load.
Correct Answer:
D
— Load per unit deflection
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Q. What is the formula for calculating the shear force at a section of a beam subjected to a point load?
A.
V = P - w * x
B.
V = w * x
C.
V = P
D.
V = P - M/L
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Solution
The shear force V at a section of a beam subjected to a point load P and a uniformly distributed load w is given by V = P - w * x, where x is the distance from the load.
Correct Answer:
A
— V = P - w * x
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