1. NAME: ______________________________________________________________________ Section: __________
Part 1: Identification. Identify the following
1. Machine is a device consisting of fixed and moving parts that converts mechanical energy and transmits it in a useful
form.
2. When the two elements have surface contact while in motion, the pair is known as lower pair.
3. When the two elements of a pair are held together mechanically in such a manner that only the required type of
relative motion occurs, then the pair is called a/an closed pair.
4. Degree of freedom of a screw pair is two.
5. A/An kinematic chain is defined as an assembly of links in which relative motion of links is possible and the motion of
each relative to the other is definite.
6. Kinematics of machinery deals with the relative motion between the parts, neglecting the forces which act on them.
7. Revolute pair is when one link has a turning or revolving motion relative to the other.
8. When the degree of freedom is zero, then it is known to be a/an structure.
9. Belt and pulley is classified as wrapping pair.
10. Kinematic diagram is a simplified scaled drawing of machine parts wherein only the dimensions that affects the
relative motion is considered.
Part 2: Discussion. Discuss the following briefly.
1. What do you understand by terms machine and mechanism? State how these differ from each other.
2. What do you mean by degree of freedom of a mechanism? Explain how it is determined.
3. ‘Slider-crank mechanism is only a special case of a four bar mechanism.’ Justify the statement.
Part 3: Problem Solving. For the given mechanism: Use the given scale.
1.
O4
O6
O8
A
B’
A’
B
C
C’
D
D’
E
E’
0
( )
( ) ( )
