PTU B.Tech production 3rd Sem Paper 2012 Theory of Machines

PTU B.Tech production 3rd Semester Paper 2012 Theory of Machines Punjab Technical University Exam 2012 3rd Semester Theory of Machines Test September and March Question Paper Free Download Punjab Technical University Theory of Machines Question Papers 2012 PTU B.Tech production 3rd Sem Question Paper 2012 for all students Previous Year old Past Papers of PTU B.Tech production 3rd Semester Paper 2012 Theory of Machines Punjab Technical University September 2012 and March 2012 Exam B.Tech production 3rd Semester Sample Model Question Papers Free Download PDF

Theory of Machines

 a) Why is the power transmitted by a crossed belt drive more than that of an open belt drive? In which case is the belt likely to wear out quickly and why?
b) Distinguish between ‘slip’ and ‘creep’ in belt drive.
c) What is friction circle? Derive an expression for its radius.
d) State and briefly explain the law of gearing.
e) Write the principle of hydrodynamic lubrication.
0 Derive Grubler’s Equation for planer mechanisms of lower pairs.
g) A mechanism is to be designed to generate the function y = x°6 for the range 1 x3, using three precision points. Find the values of x and y.
h) Write the expression for the frictional torque for conical pivot bearing assuming uniform pressure.
1) Dill erentiate between period of ascent and period of decent.
j) What is a compound epicyclic gear train?

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PTU B.Tech production 3rd Sem Paper 2012 Theory of Machines


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