1)how two directional control valve should be installed in a system to operate alternatively an actuator?in parallel or series? a)installed in parallel b)installed in series c)installed one
1)how two directional control valve should be installed in a system to operate alternatively an actuator?in parallel or series?
a)installed in parallel
b)installed in series
c)installed one serial and onther parallel
D)can be installed in any combination
2)which one of the following valve does not contain check valve inside?
A)unloading valve
b)counter balance valve
c)one direction flow control valve
d)sequence valve
3)If a constant force is applied on a surface,what should be?
a)decrease surface area
b) decrease force and surface area by same factor
c) increase force and surface area by same factor
d) increase surface area
4)in a hydraulic system the load is 9 times larger than the effort force.what is the dimeter D2 of the load piston relative to the dimeter D1 of the effort piston?
a)D2=9D1
b)D2=3D1
c)D2=18D1
d)D2=27D1
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