Q. If a beam is supported at both ends and a load is applied at the center, what type of support is typically used?
A.
Fixed support
B.
Roller support
C.
Pin support
D.
Hinge support
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Solution
A roller support is typically used for beams supported at both ends with a central load, allowing for vertical movement while preventing horizontal movement.
Correct Answer:
B
— Roller support
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Q. In a static system, if the sum of vertical forces is zero and the sum of horizontal forces is also zero, what can be concluded?
A.
The system is in dynamic equilibrium.
B.
The system is in static equilibrium.
C.
The system is unstable.
D.
The system is in motion.
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Solution
If the sum of vertical and horizontal forces is zero, the system is in static equilibrium.
Correct Answer:
B
— The system is in static equilibrium.
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Q. In a two-dimensional static equilibrium problem, how many equations are needed to solve for the unknowns?
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Solution
In a two-dimensional static equilibrium problem, two equations (sum of forces in x and y directions) are needed to solve for the unknowns.
Correct Answer:
B
— 2
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Q. What happens to the center of gravity of an object if its shape is altered but its mass remains constant?
A.
It remains in the same position.
B.
It moves closer to the heavier side.
C.
It moves to the geometric center.
D.
It cannot be determined.
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Solution
If the shape of an object is altered, the center of gravity may move closer to the heavier side, depending on the distribution of mass.
Correct Answer:
B
— It moves closer to the heavier side.
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Q. What is the center of gravity of a uniform beam?
A.
At one end of the beam
B.
At the midpoint of the beam
C.
At the quarter point of the beam
D.
At the three-quarter point of the beam
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Solution
For a uniform beam, the center of gravity is located at the midpoint of the beam.
Correct Answer:
B
— At the midpoint of the beam
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Q. What is the condition for a rigid body to be in static equilibrium?
A.
The sum of all forces acting on the body is zero.
B.
The sum of all moments about any point is zero.
C.
Both the sum of forces and the sum of moments are zero.
D.
The body must be at rest.
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Solution
For a rigid body to be in static equilibrium, both the sum of all forces and the sum of all moments acting on the body must be zero.
Correct Answer:
C
— Both the sum of forces and the sum of moments are zero.
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Q. What is the role of friction in static equilibrium?
A.
It always opposes motion.
B.
It can help maintain equilibrium.
C.
It has no effect on equilibrium.
D.
It only acts on moving bodies.
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Solution
Friction can help maintain equilibrium by providing the necessary force to counteract any applied forces that would cause motion.
Correct Answer:
B
— It can help maintain equilibrium.
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Q. Which of the following is NOT a type of support in statics?
A.
Fixed support
B.
Pin support
C.
Sliding support
D.
Hinge support
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Solution
Sliding support is not a standard type of support in statics; the common types are fixed, pin, and roller supports.
Correct Answer:
C
— Sliding support
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Q. Which of the following statements is true regarding the equilibrium of a rigid body?
A.
Only forces need to be considered.
B.
Only moments need to be considered.
C.
Both forces and moments must be considered.
D.
Equilibrium is not possible in rigid bodies.
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Solution
In the equilibrium of a rigid body, both forces and moments must be considered to ensure the body remains at rest.
Correct Answer:
C
— Both forces and moments must be considered.
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