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KOM - Basics of Mechanism

Total questions: 25

Worksheet time: 25mins

Name
Class
Date
1.

The branch of mechanics which deals with only motions and not with the forces

a)

STATIC

b)

KINEMATICS

c)

KINETICS

d)

DYNAMICS

2.

---------is a combination of rigid or restraining parts or bodies from which the machine is assembled.

a)

MACHINE

b)

STRUCTURE

c)

MECHANISM

d)

CONNECTING ROD

3.

A---------- is again a combination of links connected to each other but no relative motion exists between them.

a)

MACHINE

b)

CONNECTING ROD

c)

MECHANISM

d)

STRUCTURE

4.

If the relative motion between them is completely or successfully constrained then the pair is known as -------

a)

rolling pair

b)

kinematic pair

c)

sliding pair

d)

cylindrical pair

5.

Example of rolling pair?

a)

crankshaft

b)

mirror in car

c)

ball bearings

d)

connecting rod

6.

What is a mechanical advantage?

a)

not using simple machines

b)

making the task harder

c)

using simple machines so the task is easier

7.

An example of higher pair

a)

car mirror

b)

a shaft rotating in a bearing

c)

a nut turning on a screw

d)

cam and follower

8.

Which type of mechanism is used on a bicycle?

a)

Pulley

b)

Gears

c)

Rack and pinion

d)

Chain and sprocket

9.

Shaft with a collar at both ends revolving in a circular hole is a example of ____________ pair.

a)

Prismatic Pair

b)

Turning pair

c)

Screw Pair

d)

Spherical pair

10.

The Screw pair is a combination of _________ and __________ pair.

a)

Turning pair and Rolling pair

b)

sliding pair and turning pair

c)

sliding pair and Rolling pair

d)

all the above

11.

The ball and socket joint, attachment of a car mirror, pen stand are examples of __________ pair.

a)

Spherical pair

b)

Turning pair

c)

Rolling pair

d)

none of this

12.

A mechanism with __________ links is known as simple mechanism,

a)

TWO

b)

FOUR

c)

THREE

d)

MORE THAN FOUR

13.

A higher pair has__________.

a)

Point contact

b)

Surface contact

c)

No contact

d)

None of the above

14.

When the kinematic pairs are coupled in such a way that the last link is joined to the first link to transmit definite motion (i.e. completely or successfully constrained motion), it is called a

a)

kinematic chain

b)

link

c)

pair

d)

mechanism

15.

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, the pair formed as lower pair, Say True or False

a)

True

b)

False

16.

The relation between number of links and number of lower pairs is given as l = 2p – 4. If L.H.S is less than R.H.S of this equation then the chain is

a)

constrained

b)

unconstrained

c)

locked

d)

none of these

17.

The Grubler’s equation is applicable to:

a)

1 DOF Mechanisms

b)

2 DOF Mechanisms

c)

3 DOF Mechanisms

d)

0 DOF Mechanisms

18.

A four bar kinematic chain has ____ turning pairs

a)

1

b)

2

c)

3

d)

4

19.

The relation between the number of pairs ( p ) forming a kinematic chain and the number of links (l) is

a)

l = 2p – 2

b)

l = 2p – 3

c)

l = 2p – 4

d)

l = 2p – 5

20.

In a kinematic chain, a quaternary joint is equivalent to

a)

one binary joint

b)

two binary joints

c)

three binary joints

d)

four binary joints

21.

The Grubler’s criterion for determining the degrees of freedom (n) of a mechanism having plane motion is

a)

n = (l – 1) – j

b)

n = 2 (l – 1) – 2j

c)

n = 3 (l – 1) – 2j

d)

n = 4 (l – 1) – 3j

22.

The mechanism forms a structure, when the number of degrees of freedom (n) is equal to

a)

0

b)

1

c)

2

d)

-1

23.

In a four bar chain or quadric cycle chain

a)

each of the four pairs is a turning pair

b)

one is a turning pair and three are sliding pairs

c)

three are turning pairs and one is sliding pair

d)

each of the four pairs is a sliding pair.

24.

Which of the following is an inversion of single slider crank chain ?

a)

Beam engine

b)

Watt’s indicator mechanism

c)

Elliptical trammels

d)

Whitworth quick return motion mechanism

25.

Which of the following is an inversion of double slider crank chain ?

a)

Coupling rod of a locomotive

b)

Pendulum pump

c)

Elliptical trammels

d)

Oscillating cylinder engine