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Code No: 09A50303
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY, HYDERABAD
B. Tech III Year I Semester Examinations, May/June – 2013
Dynamics of Machinery
(Common to ME, MCT, AME, MIM)
Time: 3 hours Max. Marks: 75
Answer any five questions
All questions carry equal marks
- - -
1.a) How do the effects of gyroscopic couple and of centrifugal force make the rider of
a two wheeler tilt on one side? Derive a relation for the limiting speed of the
vehicle.
b) A thin circular disc is fitted to a shaft as shown in figure 1. Weight of the disc is
500N and diameter is 1.2m. Shaft rotates at 300rpm in anticlockwise direction
when seen from the right side. Find the effect of the gyroscopic couple on the
shaft, and the bearing reactions at A and B taking the effect of the weight of the
disc. [7+8]
Figure.1
2. A multi-disc clutch has 5 plates having four pairs of active friction surfaces. If the
intensity of pressure is not to exceed 127kN/m2, find the power in kW transmitted
at500rpm, if the outer and inner radii of friction surfaces are 1.25 mm and 75mm.
respectively. Assume uniform wear and take the coefficient of friction as 0.3. [15]
3.a) Find a relation for the coefficient of fluctuation of speed in terms of the maximum
fluctuation of energy and the kinetic energy of the flywheel at mean speed.
b) What is meant by piston effort and crank effort? Explain. [9+6]
4. The arms of a Proell governor are 275 mm long and are pivoted on the axis of
rotation. The extensions of the lower arms on which each ball is carried is 100
mm, long, and the weight of the ball is 5 kg. The central load on the sleeve is 75
kg. If the ball centres are vertically above the pin joint connecting the upper and
lower arms when the radius of rotation is 187.5 mm, determine the corresponding
equilibrium speed. Deduce the expression used. [15]
5.a) Three masses of 8 kg, 12 kg, and 15 kg attached at radial distances of 80, 100, and
60 mm respectively to a disc on a shaft are in complete balance. Determine the
angular positions of the masses of 12 kg and 15 kg relative to the 8 kg mass.
b) What do you understand by inside cylinder locomotives and outside cylinder
locomotives? What is the effect of partial balancing of locomotive? [8+7]
R09
Figure.1
2. A multi-disc clutch has 5 plates having four pairs of active friction surfaces. If the
intensity of pressure is not to exceed 127kN/m
at500rpm, if the outer and inner radii of friction surfaces
respectively. Assume uniform wear and take
) Find a relation for the coefficient of fluc
fluctuation of energy and the kinetic en
Figure.1 Figure.1
2. A multi-disc clutch has 5 plates having four pairs of active friction surfaces. If the
intensity of pressure is not to exceed 127kN/m
at500rpm, if the outer and inner radii of friction surfaces
respectively. Assume uniform wear and take
) Find a relation for the coefficient of fluc
fluctuation of energy and the kinetic en
Figure.1
2. A multi-disc clutch has 5 plates having four pairs of active friction surfaces. If the
is not to exceed 127kN/m
at500rpm, if the outer and inner radii
respectively. Assume uniform wear and take
Figure.1
mm, long, and the weight of the ball is 5 kg. The central load on the sleeve is 75
t connecting the upper and
mm, long, and the weight of the ball is 5 kg. The central load on the sleeve is 75
t connecting the upper and
mm, long, and the weight of the ball is 5 kg. The central load on the sleeve is 75
rtically above the pin join
mm, long, and the weight of the ball is 5 kg. The central load on the sleeve is 75
rtically above the pin join
mm, long, and the weight of the ball is 5 kg. The central load on the sleeve is 75
rtically above the pin join
mm, long, and the weight of the ball is 5 kg. The central load on the sleeve is 75
kg. If the ball centres are ve
mm, long, and the weight of the ball is 5 kg. The central load on the sleeve is 75
kg. If the ball centres are ve
mm, long, and the weight of the ball is 5 kg. The central load on the sleeve is 75 mm, long, and the weight of the ball is 5 kg. The central load on the sleeve is 75
mm long and are pivoted on the axis of
ms on which each ball is carried is 100
mm long and are pivoted on the axis of
ms on which each ball is carried is 100
mm long and are pivoted on the axis of
ms on which each ball is carried is 100
4. The arms of a Proell governor are 275 mm long and are pivoted on the axis of
ms on which each ball is carried is 100
4. The arms of a Proell governor are 275
rotation. The extensions of the lower ar
4. The arms of a Proell governor are 275
rotation. The extensions of the lower ar
4. The arms of a Proell governor are 275
rotation. The extensions of the lower ar
4. The arms of a Proell governor are 275 mm long and are pivoted on the axis of
ank effort? Explain. [9+6] ank effort? Explain. [9+6] ank effort? Explain. [9+6] ank effort? Explain. [9+6] ank effort? Explain. [9+6] b) What is meant by piston effort and cr b) What is meant by piston effort and cr b) What is meant by piston effort and cr b) What is meant by piston effort and cr
tuation of speed in terms of the maximum tuation of speed in terms of the maximum tuation of speed in terms of the maximum ) Find a relation for the coefficient of fluctuation of speed in terms of the maximum ) Find a relation for the coefficient of fluc) Find a relation for the coefficient of fluc) Find a relation for the coefficient of fluc3.a) Find a relation for the coefficient of fluc
friction as 0.3. [15] the coefficient of friction as 0.3. [15] the coefficient of respectively. Assume uniform wear and takerespectively. Assume uniform wear and takerespectively. Assume uniform wear and takerespectively. Assume uniform wear and takerespectively. Assume uniform wear and takerespectively. Assume uniform wear and takerespectively. Assume uniform wear and takerespectively. Assume uniform wear and takerespectively. Assume uniform wear and takerespectively. Assume uniform wear and take
, find the power in kW transmitted , find the power in kW transmitted , find the power in kW transmitted is not to exceed 127kN/mis not to exceed 127kN/mis not to exceed 127kN/mintensity of pressure is not to exceed 127kN/mintensity of pressure intensity of pressure is not to exceed 127kN/mis not to exceed 127kN/mis not to exceed 127kN/m
disc. [7+8]
B taking the effect of the weight of the
disc. [7+8]
B taking the effect of the weight of the
disc. [7+8]
B taking the effect of the weight of the
disc. [7+8]
shaft, and the bearing reactions at A and B taking the effect of the weight of the
disc. [7+8]
shaft, and the bearing reactions at A and
disc. [7+8]
shaft, and the bearing reactions at A and
disc. [7+8]
shaft, and the bearing reactions at A and
disc. [7+8]
shaft, and the bearing reactions at A and
disc. [7+8]
B taking the effect of the weight of the
when seen from the right side. Find the effect of the gyroscopic couple on the
at 300rpm in anticlockwise direction
when seen from the right side. Find the effect of the gyroscopic couple on the
at 300rpm in anticlockwise direction
when seen from the right side. Find the effect of the gyroscopic couple on the
at 300rpm in anticlockwise direction
when seen from the right side. Find the effect of the gyroscopic couple on the
500N and diameter is 1.2m. Shaft rotates
when seen from the right side. Find the effect of the gyroscopic couple on the
500N and diameter is 1.2m. Shaft rotates
when seen from the right side. Find the effect of the gyroscopic couple on the
500N and diameter is 1.2m. Shaft rotates
when seen from the right side. Find the effect of the gyroscopic couple on the
500N and diameter is 1.2m. Shaft rotates
when seen from the right side. Find the effect of the gyroscopic couple on the
500N and diameter is 1.2m. Shaft rotates
when seen from the right side. Find the effect of the gyroscopic couple on the
at 300rpm in anticlockwise direction
t as shown in figure 1. Weight of the disc is t as shown in figure 1. Weight of the disc is t as shown in figure 1. Weight of the disc is t as shown in figure 1. Weight of the disc is t as shown in figure 1. Weight of the disc is b) A thin circular disc is fitted to a shafb) A thin circular disc is fitted to a shafb) A thin circular disc is fitted to a shaf
vehicle.
b) A thin circular disc is fitted to a shaf
1.a) How do the effects of gy
a two wheeler tilt on one side? Derive a relation for the limiting speed of the
1.a) How do the effects of gy
a two wheeler tilt on one side? Derive a relation for the limiting speed of the
1.a) How do the effects of gy
a two wheeler tilt on one side? Derive a relation for the limiting speed of the a two wheeler tilt on one side? Derive a relation for the limiting speed of the
ugal force make the rider of
a two wheeler tilt on one side? Derive a relation for the limiting speed of the
ugal force make the rider of
a two wheeler tilt on one side? Derive a relation for the limiting speed of the
roscopic couple and of centrif
a two wheeler tilt on one side? Derive a relation for the limiting speed of the
roscopic couple and of centrif
a two wheeler tilt on one side? Derive a relation for the limiting speed of the
roscopic couple and of centrif
a two wheeler tilt on one side? Derive a relation for the limiting speed of the
ugal force make the rider of
All questions carry equal marks
Answer any five questions
All questions carry equal marks
Answer any five questions
All questions carry equal marks All questions carry equal marks
Answer any five questions
Time: 3 hours Max. Marks: 75 Time: 3 hours Max. Marks: 75
(Common to ME, MCT, AME, MIM)
Time: 3 hours Max. Marks: 75
(Common to ME, MCT, AME, MIM)
Time: 3 hours Max. Marks: 75
(Common to ME, MCT, AME, MIM)
Time: 3 hours Max. Marks: 75
(Common to ME, MCT, AME, MIM)
Time: 3 hours Max. Marks: 75 Time: 3 hours Max. Marks: 75 Time: 3 hours Max. Marks: 75
(Common to ME, MCT, AME, MIM)
B. Tech III Year I Semester Examinations, May/June – 2013 B. Tech III Year I Semester Examinations, May/June – 2013 B. Tech III Year I Semester Examinations, May/June – 2013
Dynamics of Machinery
B. Tech III Year I Semester Examinations, May/June – 2013
Dynamics of Machinery
B. Tech III Year I Semester Examinations, May/June – 2013 B. Tech III Year I Semester Examinations, May/June – 2013
Code No: 09A50303 Code No: 09A50303
tuation of speed in terms of the maximum
friction as 0.3. [15]
, find the power in kW transmitted
||
2
6.a) A single cylinder engine of total mass 20 kg is to be mounted on an elastic
support which permits vibratory movement in vertical direction only. The elastic
support consists of three springs of stiffness ‘k’ N/m each. If the unit operates at
580 rpm, what should be the value of spring constant ‘k’, if only 10% of the
shaking force of the unit is to be transmitted to the support structure?
b) Explain what do you understand by over-damped system, under-damped system,
and critically damped system. [10+5]
7. A reciprocating mechanism with two external forces P and F3 is shown in
figure.2. For the configuration shown, the impending motion of the slider is to the
right, and the friction angle is . Determine the couple C2on link 2 for static
equilibrium. [15]
Figure.2
8.a) Distinguish between the three-position synthesis and four-position synthesis with
respect to their applications.
b) Write and explain the Freudenstein’s equation with respect to a four bar
mechanism. [7+8]
********
respect to their applications.
b) Write and explain the Freudenstein’s
mechanism. [7+8]
********
Figure.2
8.a) Distinguish between the three-position synthesis and four-position synthesis with
respect to their applications.
b) Write and explain the Freudenstein’s equation with respect to a four bar
8.a) Distinguish between the three-position
respect to their applications.
b) Write and explain the Freudenstein’s
mechanism. [7+8]
********
mechanism. [7+8]
Figure.2
8.a) Distinguish between the three-position synthesis and four-position synthesis with
respect to their applications.
b) Write and explain the Freudenstein’s equation with respect to a four bar
mechanism. [7+8]
b) Write and explain the Freudenstein’s
mechanism. [7+8]
********
Figure.2
synthesis and four-position synthesis with
respect to their applications.
******** ******** ******** ********
equation with respect to a four bar equation with respect to a four bar equation with respect to a four bar equation with respect to a four bar equation with respect to a four bar equation with respect to a four bar b) Write and explain the Freudenstein’sb) Write and explain the Freudenstein’sb) Write and explain the Freudenstein’sb) Write and explain the Freudenstein’sb) Write and explain the Freudenstein’sb) Write and explain the Freudenstein’sb) Write and explain the Freudenstein’sb) Write and explain the Freudenstein’s
synthesis and four-position synthesis with synthesis and four-position synthesis with synthesis and four-position synthesis with synthesis and four-position synthesis with synthesis and four-position synthesis with synthesis and four-position synthesis with synthesis and four-position synthesis with synthesis and four-position synthesis with synthesis and four-position synthesis with 8.a) Distinguish between the three-position 8.a) Distinguish between the three-position 8.a) Distinguish between the three-position 8.a) Distinguish between the three-position
Figure.2 Figure.2
right, and the friction angle is
equilibrium. [15]
right, and the friction angle is
equilibrium. [15]
right, and the friction angle is
equilibrium. [15] equilibrium. [15]
on link 2 for static
equilibrium. [15]
on link 2 for static
equilibrium. [15]
. Determine the couple C
equilibrium. [15]
. Determine the couple C
equilibrium. [15] equilibrium. [15]
on link 2 for static . Determine the couple C
pending motion of the slider is to the
is shown in
pending motion of the slider is to the
7. A reciprocating mechanism with two external forces P and F
pending motion of the slider is to the
7. A reciprocating mechanism with two external forces P and F
pending motion of the slider is to the
7. A reciprocating mechanism with two external forces P and F
figure.2. For the configuration shown, the im
7. A reciprocating mechanism with two external forces P and F
figure.2. For the configuration shown, the im
7. A reciprocating mechanism with two external forces P and F
figure.2. For the configuration shown, the im
7. A reciprocating mechanism with two external forces P and F
figure.2. For the configuration shown, the im
7. A reciprocating mechanism with two external forces P and F
figure.2. For the configuration shown, the im
is shown in
and critically damped system. [10+5] and critically damped system. [10+5] and critically damped system. [10+5] and critically damped system. [10+5] and critically damped system. [10+5] and critically damped system. [10+5] and critically damped system. [10+5] and critically damped system. [10+5] and critically damped system. [10+5]
by over-damped system, under-damped system, by over-damped system, under-damped system,
transmitted to the support structure?
by over-damped system, under-damped system,
transmitted to the support structure?
by over-damped system, under-damped system,
transmitted to the support structure?
by over-damped system, under-damped system,
shaking force of the unit is to be
b) Explain what do you understand
shaking force of the unit is to be
b) Explain what do you understand
shaking force of the unit is to be
b) Explain what do you understand
shaking force of the unit is to be
b) Explain what do you understand
transmitted to the support structure? shaking force of the unit is to be
’ N/m each. If the unit operates at
’, if only 10% of the
’ N/m each. If the unit operates at
’, if only 10% of the
’ N/m each. If the unit operates at
580 rpm, what should be the value of spring constant ‘
support consists of three springs of stiffness ‘
580 rpm, what should be the value of spring constant ‘
support consists of three springs of stiffness ‘
580 rpm, what should be the value of spring constant ‘
support consists of three springs of stiffness ‘
580 rpm, what should be the value of spring constant ‘
support consists of three springs of stiffness ‘
580 rpm, what should be the value of spring constant ‘
support consists of three springs of stiffness ‘ ’ N/m each. If the unit operates at support consists of three springs of stiffness ‘
6.a) A single cylinder engine of total ma6.a) A single cylinder engine of total ma6.a) A single cylinder engine of total ma ed on an elastic ss 20 kg is to be mountss 20 kg is to be mss 20 kg is to be m6.a) A single cylinder engine of total ma ed on an elastic
equation with respect to a four bar b) Write and explain the Freudenstein’s
2right, and the friction angle is
||