A5805

RegNO.« Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIFTH SEb[ESTER B.TECH DEGREE EXAMINATION, APRIL 2018

Course Code: ME307
Course Name: MACHRe.'E DESIG-q -1 (AU)
Max. Marks: 100 Duration: 3 Hours
PART A
Answer any threefuU quegions, each camies 10 marks Marks

la) Define transmission angle in a planar mechanism and give its
significance. (3)

b) What is the Kutzbach Crit«ion for mechanisms? (3) ०)

Calculate the mobility of the following mechanisms. (4)

ಲು ८.२५.)

2 a) What do you mean by kinematic inversion? (2) 2) What
are the different kinematic inversions of the slider crank
chain? Explain (8) each with the help of figure and
applications of the same.

3 For the mechanism shown in figure, 202 — 100mrn, BA = 250
mm, 0402 — (10) 250mm and 804 = 300൩൩. If link 2 is given
a constant angular velocity of 45 rad/s in the counter
clockwise direction, Find the angular velocities and
angular accelerations of links 3 and 4. Also find the
absolute velocity of point B.

B

4 a) What do you mean by a linear system and the principle
of superposition? (3) b) In a slider crank mechanism with
crm_k radius of 40 mm and connecting rod (7) length of
100 mm, find the extemal torque to be applied on the crank
for static equilibrium when the crank angle is 45° from
top dead centre and the piston load is 1500 N.

PART B
Answer any threefuU questions each curries I O marks
5 Explain the construction and working of the following
a) Watt governor (5) b) Hartnell Governor (5)
6 a) Derive an expression for the g)roscopic couple in a

rotor with moment of inertia I, (4) angular velocity