Question 190General Subjects - Assistant Engineer70% to pass
Which of the statements is true concerning the illustrated hydraulic circuit when the directional control valve is centered? Illustration GS-0105
AI Explanation
The correct answer is D.
When the directional control valve is centered, the oil pressure will equalize at both ends of the actuator, but a difference in pressure may exist between the rod and cap end due to the load on the actuator. The pump will continue to discharge oil, with the excess flow being directed across the relief valve to the sump.
The other options are incorrect because:
A) The pressure will not be equal on both sides of the actuator when the load is unbalanced.
B) The pressure differential will not be across the unloading valve, but rather the actuator itself.
C) The reducing valve will not be involved in this scenario, as the pump will continue to operate and discharge to the relief valve.
Related Questions
#188 Which of the following statements will be true if the position of the manual control lever, shown in the illustration, remains unchanged after the pump is placed on stroke? Illustration GS-0039 #189 Compensated flow control or constant flow valves are used in hydraulic systems to _______________.#191 Which of the listed pressure control valves would be used to permit the completion of one action of a hydraulic system before a second action would be permitted? #192 The purpose of a restrictor valve, as it is used in a hydraulic hatch cover system is to _______________.#193 Which of the listed pressure-control valves would be used in a hydraulic system to temporarily divert some, or all of the pump discharge until the additional flow was required?