Q1. A Porter Governor has two flyweights each of mass 1.4kg, a central mass of 20kg and arms of length 210mm. At 300 rev/min the sleeve is just about to rise and the arms are at an angle of 35° to the vertical. Calculate EACH of the following:
(a) The friction force at the sleeve;
(b) The speed at which the sleeve would begin to fall.
Q1. A section of a hydraulic control system is shown in Fig Q7. The system is filled with an incompressible fluid. Movement of the input piston A causes the output pistons B and C to move. Piston C moves against a spring of stiffness 40kN/m. Piston B has no resistance to movement but reaches a rigid stop after 30mm travel. Piston A has a diameter of 40mm and pistons B and C are each 80mm diameter.
Calculate the total movement of the piston A, X when a force of 1200N is applied to it.
Q1. Two close-coiled helical springs of different length with the following dimensions are fitted concentrically in parallel on a flat horizontal surface:
The combined springs are subjected to a total load of 600N. Calculate EACH of the following:
(a) The compression of each spring;
(b) The load carried by each spring.
Note: Modulus of Rigidity for Spring Material = 80GN/m2.
Username or email address *Required
Password *Required
Note: Entering wrong username in the login form will ban your IP address immediately. Entering wrong password multiple times will also ban your IP address temporarily.
Log in
Lost your password? Remember me
No account yet?
