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Question 1

treats of the designing and construction of machinery.

Answer 1

Science of Mechanism

Question 2

is a device that transforms input forces and movement into a desired set of output forces and movement.

Answer 2

mechanism

Question 3

moving components of Mechanisms

Answer 3

Gears and gear trains; Belt and chain drives; Cam and

followers;

Question 4

Friction devices

Answer 4

brakes and clutches

Question 5

Various machine elements,

Answer 5

splines, pins, and keys.

Question 6

is a combination
of resistant bodies so arranged that by their means the mechanical forces of nature can
be compelled to do work accompanied by certain determinate motion.

Answer 6

machine

Question 7

defined as the two links or elements of a machine when in contact
with each other are said to form a pair. If the relative motion between them is completely
or successfully constrained in a definite direction,

Answer 7

Kinematic pair

Question 8

three types of Kinematic pair

Answer 8

Types of relative motion; Types of Contact; and Types of mechanical constraint or Type of closure.

Question 9

Relative Motion types categorized into 5 parts what are they

Answer 9

Sliding, Turning, Rolling,

Screw and Spherical Pair.

Question 10

This consists of two elements connected in such a manner that one is constrained to have a sliding motion relative to another. Example: Rectangular
bar in a rectangular hole; Square bar in the square hole; Piston and cylinder of an IC engine; Tail-stock and lathe bed, etc.

Answer 10

Sliding Pair

Question 11

This consists of two elements connected in such a manner that one is constrained to turn or revolve about a fixed axis of another element. Example: Shaft with a collar at both ends revolving in a circular hole; the crankshaft of an IC engine turning in a bearing; Cycle wheel revolving about their axles.

Answer 11

Turning Pair

Question 12

This consists of two elements connected in such a manner that one
is constrained to roll in another element which is fixed. Example: Ball and roller
bearings; Wheel rolling on a flat surface; Marble rolling on a flat surface.

Answer 12

Rolling Pair:

Question 13

This consists of two elements connected in such a manner that one element turns about the other element by means of threads. The motion, in this
case, is a combination of sliding and turning. Example: The lead screw of a lathe and nut; Nut and bolt combination; Screw with nut of screw jack.

Answer 13

Screw Pair

Question 14

This consists of two elements connected in such a manner that one element in the form of a sphere turns about the other fixed element. Example: Ball and socket joint; Pen stand; Minor attachment of vehicles.

Answer 14

Spherical Pair

Question 15

Types of contact is classified as

Answer 15

Lower pair and Higher Pair

Question 16

When the two elements of a pair have surface contact when relative motion takes place and the surface of one element slides over the surface of another element

Answer 16

Lower pair

Question 17

When the two elements of a pair have line contact or point contact when relative motion takes place and the motion between the two elements is partly turning, sliding then the pair is known as

Answer 17

Higher Pair

Question 18

Types of Mechanical Constraint classified into two types what are they

Answer 18

Self-closed pair and

Force closed pair.

Question 19

whenever two elements of pair are held together

mechanically in such a way that only required the type of relative motion occurs is called.

Answer 19

Self-closed pair or closed pair:

Question 20

whenever two elements of pair are not held

together mechanically but are kept in contact by the action of external forces the pair is said to be.

Answer 20

Force closed pair or Unclosed pair:

Question 21

scheme illustrates the connectivity of links and
joints of a mechanism or machine rather than the dimensions or shape of the parts. Often links are presented as geometric objects, such as lines, triangles or squares, that support schematic versions of the joints of the mechanism or machine.

Answer 21

kinematic diagram

Question 22

Elements of kinematics diagrams

Answer 22

include the frame, which is the frame of

reference for all the moving components, as well as links (kinematic pairs), and joints.

Question 23

Primary Joints include

Answer 23

pins, sliders and other elements that allow pure rotation or pure
linear motion.

Question 24

also exist that allow a combination of rotation or linear

motion.

Answer 24

Higher order joints

Question 25

can be divided into planar mechanisms and spatial mechanisms, according to the relative motion of the rigid bodies.

Answer 25

Mechanisms

Question 26

all of the relative motions of the rigid bodies are in one

plane or in parallel planes.

Answer 26

planar mechanisms

Question 27

If there is any relative motion that is not in the same plane or
in parallel planes, the mechanism is called

Answer 27

spatial mechanism.

Question 28

special linkages:

Answer 28

Watt’s linkage, Hoeken’s linkage, Chebyshev’s linkage. Peaucellier linkage, Sarrus linkage Klann linkage and the Jansen linkage