Theory of Machine
Which of the following statements regarding laws governing the friction between dry surfaces are correct?

The friction force is directly proportional to the normal force.
The friction force is independent of me area of contact.
The friction force is dependent on the materials of the contact surfaces.
All of these

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Theory of Machine
In order to give the primary balance of the reciprocating parts of a multi-cylinder inline engines

The algebraic sum of the couples about any point in the plane of the primary forces must be equal to zero
None of these
The algebraic sum of the primary forces must be equal to zero
Both (A) and (B)

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Theory of Machine
The Klein's method of construction for reciprocating engine mechanism

Enables determination of Cariole’s component
Is based on acceleration diagram
Is a simplified form of instantaneous center method
Utilizes a quadrilateral similar to the diagram of mechanism for reciprocating engine

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