If the two cylinders are in the fully retracted position, depressing a START pushbutton will cause the feed cylinder rod to extend.
When the feed cylinder rod becomes fully extended, the press cylinder
rod starts to extend. A pressure switch detects the pressure in the cap
end of the press cylinder.
When this pressure attains 600 kPa
(or 80 psi), a timer is started. This timer is used to delay the retraction
of the press cylinder rod for a period of 3 s.
After the delay, both cylinder rods retract.
When the cylinder rods become fully retracted, they stop and wait for
the operator to start another cycle.

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.