UNIT-I A] Theory Question Bank Q. No Description 1 Define the following terms : (i) Kinematic chain (ii) Structure (iii) Kinematic pair (iv)Degree of freedom in Mechanism. 2 Define inversion of a mechanism. Explain with the help of neat sketches inversions of double slider crank chain. Give their applications. 3 Calculate the number of degree of freedom of the mechanism As shown 4 Explain the following terms with suitable examples : (i) Completely constrained motion (ii) Incompletely constrained motion (iii) Successfully constrained motion. 5 Explain with neat sketches ‘Swinging and Rocking Mechanisms’. 6 What is the condition for correct steering? Explain with neat sketch Ackermann steering gear mechanism. 7 Describe the three kinds of lower pairs, giving a sketch of each kind, and state the types of relative
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UNIT-I
A] Theory Question Bank
Q. No Description
1 Define the following terms :
(i) Kinematic chain
(ii) Structure
(iii) Kinematic pair
(iv)Degree of freedom in Mechanism.
2 Define inversion of a mechanism. Explain with the
help of neat sketches inversions of double slider
crank chain. Give their applications.
3 Calculate the number of degree of freedom of the
mechanism As shown
4 Explain the following terms with suitable examples :
(i) Completely constrained motion
(ii) Incompletely constrained motion
(iii) Successfully constrained motion.
5 Explain with neat sketches ‘Swinging and Rocking
Mechanisms’.
6 What is the condition for correct steering? Explain
with neat sketch Ackermann steering gear
mechanism.
7 Describe the three kinds of lower pairs, giving a
sketch of each kind, and state the types of relative
motion that each
pair permits.
8 Explain with a neat sketch ‘Geneva Mechanism’.
9 Fill in the blanks with correct alternative and
rewrite the
complete sentences :
(i) Oldham’s coupling is the inversion
of.............................. .
(a) Four bar mechanism
(b) Crank and lever mechanism
(c) Single slider crank mechanism
(d) Double slider crank mechanism
(ii) ..........................number of pairs are associated
with quaternary
joint.
(a) 1
(b) 2
(c) 3
(d) 4
(iii) A combination of kinematic pairs, joined in
such a way
that the relative motion between the links is
completely
constrained, is called a........................... (a)
Structure
(b) Mechanism
(c) Kinematic Chain
(d) Inversion
10 What is meant by a ‘steering gear mechanism’? Why
is it necessary? Why are steering gear mechanisms
seen in four wheelers and not in two or three-
wheelers? Explain
11 Define the Following Term
i) Grashoff’s Law
ii) Structure
iii) Degree of Freedom
iv) Mechanism
12 Explain with neat sketch whitworth Quick Return
Mechanism
13 What is a condition of correct steering? With the
help of neat sketch explain the construction and
working of Davis Steering Gear mechanism
14 Define the following
i) Machine
ii) Kinematic Chain
iii) Kinematic Link
iv] Grashoff’s law
15 Explain the following terms with suitable examples:-
i] Completely constrained motion
ii] Incompletely constrained motion
iii] Successfully constrained motion
16 Write short note on
i) Pantograph along with its application.
ii) Scotch yoke mechanism
17 In a Oldham coupling, the distance between shaft
axes is 30 mm and speed of rotation is 600 rpm,
what is maximum speed of sliding of each tongue in
the slot?
18 Define:-
1. DOF of a body
2. DOF of a mechanism
19 Define and explain with neat sketches the various
types of constrained motions
20 Define kinematic pair and discuss various types of
kinematic pairs with examples.
21 State and explain Grubler criterion for mobility of a
planer mechanism with various applications using
lower pairs and higher pairs
22 Different mechanisms may be obtained by
inversions of the same kinematic chain. Explain the
meaning of this statement with all inversions of
single slider crank chain. Give practical application
of each inversion
23 With the help of neat sketch, explain Pecullier
straight line mechanism giving proof of the tracing
point describing exact straight line
24 Explain the working of Davis steering gear with the
help of a neat sketch. Find the inclination of track
arm in terms of wheel base and the distance
between the pivots of the axle in order to satisfy the
condition of steering.
25 Write short note on “Ackermann steering gear”
26 In a Davis steering gear the distance between the
pivots of the front axle is 120 cm and the wheel
base is 260 cm. When the vehicle is moving on a
straight path, find the inclination of track arms to
the vertical
27 A car using Ackermann steering gear has a wheel
base of 2.8m and a track of 1.5m. The track rod is
1.1m and the track arm is 0.15m. The distance
between the pivots of stub axle is 1.2m. Find the
radius of turning of inner wheels for correct
steering.
28 Write a short note on elliptical trammel. State and
explain the condition for which it will trace a circle
29 In case of an elliptical trammel, prove that any point
on the coupler rod traces perfect ellipse. Hence
locate that point on the coupler, which will trace
circle
30 Write a short note on Gnome engine
31 Compare ‘Davis’ and ‘Ackermann’ steering gear
mechanisms
32 In the Davis steering gear mechanism, the distance
between the pivots of the front axles is 1.2m. The
wheel base is 3m. When a vehicle is moving along a
straight path, find the inclination of the track arms
to the longitudinal axis, provided that the
mechanism has to satisfy the condition of correct
steering
33 In case of Davis steering gear mechanism:
1. The distance between the pivots of the front
axle = 1.5m
2. The wheel base = 5m
Find the inclination of the track arms to the
longitudinal axis, provided that the mechanism has
to satisfy the condition of correct steering
34 What is kinematic pair? Give its classification in
details.
35 Explain types of kinematic links with neat sketches
36 Explain types of kinematic joints with neat sketches
37 Explain Kutzbach criterion.
38 Differentiate between Machine and Mechanism
39 What is four bar chain mechanism? Explain any
one Inversion with neat sketch
40 Explain Beam engine with neat sketch
41 Explain Fourth Inversion of Single slider crank
mechanism with neat sketch
42 Explain Skotch yoke mechanism with neat sketch
43 Write a short note on Equivalent linkage of
mechanism
44 Calculate the number of degree of freedom of the
mechanism As shown in Fig
45 Calculate the number of degree of freedom of the
mechanism As shown in Fig
46 Calculate the number of degree of freedom of the
mechanism As shown
47 Calculate the number of degree of freedom of the
mechanism As shown
48 Calculate the number of degree of freedom of the
mechanism As shown
49 Calculate the number of degree of freedom of the
mechanism As shown
50 What are rigid and resistant bodies? Elaborate.
MCQ QUESTION BANK
Q. No Description
1 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
Ans. (c) when ‘l ’ number of links are joined at the same connection,
the joint is equivalent to
(L - 1) binary joints
2 A round bar A passes through the cylindrical hole in B as shown in the
given figure. Which one of the following statements is correct in this
regard?
a) The two links shown form a kinematic pair.
b) The pair is completely constrained.
c) The pair has incomplete constraint.
d) The pair is successfully constrained.
Ans. (c)
3 Consider the following statements
1. A round bar in a round hole form a turning pair.
2. A square bar in a square hole forms a sliding pair.
3. A vertical shaft in a footstep bearing forms a successful
constraint.
Of these statements
(a) 1 and 2 are correct
(b) 2 and 3 are correct
(c) 1 and 3 are correct
(d) 1, 2 and 3 are correct
Ans. (b)
4 Consider the following statements:
1. Lower pairs are more resistant than the higher pairs in a
plane mechanism.
2. In a 4-bar mechanism (with 4 turning pairs), when the link opposite to
the shortest link is fixed, a double rocker mechanism results.
Which of the statements given above is/are correct?
(a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2
Ans. (c)
5 Consider the following pairs of parts:
1. Pair of gear in mesh
2. Belt and pulley
3. Cylinder and piston
4. Cam and follower
Among these, the higher pairs are
(a) 1 and 4 (b) 2 and 4 (c) 1, 2 and 3 (d) 1, 2 and 4
Ans. (a)
6 Which of the following is a higher pair?
(a) Belt and pulley (b) Turning pair (c) Screw pair (d) Sliding pair
Ans. (a) A higher pair have point or line contact.
7 Which of the following disciplines provides study of relative
motion between the parts of a machine
(a) theory of machines (b) applied mechanics (c)mechanisms (d)
kinetics
(e) kinematics
Ans: e
8 Which of the following is a lower pair
(a) ball and socket (b) piston and cylinder (c) cam and follower
(d) (a) and (b) above
(e) belt drive.
Ans: d
9 If two moving elements have surface contact in motion, such
pair is known as
(a) sliding pair (b) rolling pair
(c) surface pair (d) lower pair (e) higher pair.
Ans: e
10 The example of lower pair is
(a)shaft revolving in a bearing
(b)straight line motion mechanisms
(c)automobile steering gear
(d)all of the above
(e)none of the above.
Ans: d
11 Pulley in a belt drive acts as
(a)cylindrical pair (b)turning pair (c) rolling pair (d)sliding pair
(e)surface pair.
Ans: c
12 The example of rolling pair is
(a)bolt and nut (b)lead screw of a lathe (c)ball and socket joint (d)ball