STUPIDSID
Answer any one question from Q1 and Q2
1 (a)
Define 'Inversion'. Explain with the help of neat sketches any two inversions of double slider crank chain.
5 M
1 (b)
Write a note on 'Dynamically Equivalent System'.
5 M
2 (a)
Compare 'Davis' and 'Ackermann' Steering Gear Mechanisms.
4 M
2 (b)
With the help of neat schematic diagram, derive frequency equation of bifilar suspension system.
6 M
Answer any one question from Q3 and Q4
3 (a)
Determine the dimensions of the contact surfaces of cone clutch, for the following specifications:
(i) Power transmission capacity = 20 kW
(ii) Speed = 1600 RPM
(iii) Cone angle = 30°
(iv) Maximum intensity of pressure = 0.8 ? 10 5 N/m2.
(v) Coefficient of friction = 0.3
(vi) Mean radius is twice the width of the friction surface.
Assume uniform wear condition.
(i) Power transmission capacity = 20 kW
(ii) Speed = 1600 RPM
(iii) Cone angle = 30°
(iv) Maximum intensity of pressure = 0.8 ? 10 5 N/m2.
(v) Coefficient of friction = 0.3
(vi) Mean radius is twice the width of the friction surface.
Assume uniform wear condition.
5 M
3 (b)
Explain Complex Algebra method of acceleration analysis for a binary link.
5 M
4 (a)
Describe with neat sketch the construction and working of epicyclic train type dynamometer.
5 M
4 (b)
Derive an equation for velocity of piston in an I.C. engine mechanism, when crank rotates with uniform angular velocity using analytical method.
5 M
Answer any one question from Q5 and Q6
5 (a)
State and explain Kennedy's theorem.
4 M
5 (b)
In the mechanism shown in Fig. 1, the crank OA rotates at 20 RPM in anticlockwise direction and gives motion to the sliding blocks B and D. For the given configuration of mechanism, determine by relative velocity method and relative acceleration method:
(i) Velocity of sliders B and D
(ii) Angular velocity of link CD
(iii) Acceleration of sliders B.
OA = 300 mm, AB = 1.2 m, BC = CD = 450 mm
(i) Velocity of sliders B and D
(ii) Angular velocity of link CD
(iii) Acceleration of sliders B.
OA = 300 mm, AB = 1.2 m, BC = CD = 450 mm
11 M
6 (a)
With the help of neat sketch, explain the concept of 'Velocity Image Principle'.
4 M
6 (b)
In the mechanism shown in Fig. 1 the crank OA rotates at
20 RPM in anticlockwise direction and gives motion to the sliding locks B and D. For the given configuration of mechanism, locate all instantaneous centres of rotation, then determine:
i) Velocity of sliders B and D
ii) Angular velocities of links AB and CD.
i) Velocity of sliders B and D
ii) Angular velocities of links AB and CD.
11 M
Answer any one question from Q7 and Q8
7 (a)
What is Coriolis acceleration ? Find the direction of this acceleration in the case shown in Fig. 2.
4 M
7 (b)
The crank of an engine is 180mm long and obliquity ratio
is 4. Determine the velocity and acceleration of the piston,
when the crank is turned through 40° from I.D.C. position for the following two cases:
(i) The crank rotates at a uniform speed of 300 RPM
(ii) The crank rotates at a speed of 300 RPM and is increasing at the rate of 120 rad/s2.
(i) The crank rotates at a uniform speed of 300 RPM
(ii) The crank rotates at a speed of 300 RPM and is increasing at the rate of 120 rad/s2.
11 M
8 (a)
Explain the procedure to construct Klein's construction to determine the velocity and acceleration of a piston an I.C. engine mechanism, when crank rotates at a uniform angular velocity.
4 M
8 (b)
The driving crank AB of length 75 mm for the quick return mechanism, as shown in Fig. 3 revolves at a uniform speed of 200 RPM. Find acceleration of point Q, for the configuration shown, when the crank makes an angle of 60° with the vertical line of centres PA.
11 M
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