Question 100Motor Plants - 1st Asst/Chief
70% to passWhat terminates the sludge discharge cycle of the device shown in the illustration? Illustration MO-0112
AThe solenoid valve opens, directs high-pressure fluid into the closing chamber, and results in an upward movement of the sliding piston.
BThe solenoid valve closes, reduces the water pressure to the paring chamber, and allows the spring force to move the sliding piston upward.
CThe solenoid valve closes, allows the weight of the sliding piston to oppose the low water pressure, and moves it along the axis of the spindle.
DThe solenoid valve closes, allows the water in the opening chamber to bleed off through "S", and the sliding piston moves upward due to the force developed in area "J".
AI Explanation
The correct answer is D. The solenoid valve closing allows the water in the opening chamber to bleed off through "S", which allows the sliding piston to move upward due to the force developed in area "J". This is the mechanism that terminates the sludge discharge cycle of the device shown in the illustration. The other options are incorrect because: A) This would describe the opening cycle, not the termination of the sludge discharge cycle. B) The reduction in water pressure to the paring chamber would not directly cause the sliding piston to move upward. C) The weight of the sliding piston alone would not be sufficient to overcome the low water pressure and move it along the axis of the spindle.
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