Lab 6 DCV Clamp and Drill - Alvin

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Centennial College *

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Mechanical Engineering

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Apr 3, 2024

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College Credits: Paul Bligdon Page 1 Industrial Hydraulics for Colleges Week 6 Directional Control Valve Circuit Student Name : Alvin S. Borras Section: ROBO-121- 003 Instructor: Paul Bligdon

College Credits: Paul Bligdon Page 2 Industrial Hydraulics for Colleges Week 6 Review Questions 1. Describe the directional control valve used to control the rotation of the hydraulic motor in this circuit. a. 2 position, 4 way, manual operated, spring centered b. 3 position, 4 way solenoid activated, spring centered, all ports blocked c. 3 position 4 way, manually operated spring centered, open center condition d. 3 position, 4 way, solenoid activated, spring centered, tandem centered 2. Describe the directional control valve used to extend and retract the cylinder in this circuit. a. 2 position, 4 way, manual operated, spring centered b. 3 position, 4 way solenoid activated, spring centered, all ports blocked c. 3 position 4 way, manually operated spring centered, open center condition d. 3 position, 4 way, solenoid activated, spring centered, tandem centered 3. During this lab, the pump always delivered a. Its maximum volume b. Only the volume required to fill the hydraulic system c. Only the volume required to move the actuator d. Volume fluctuated based on system pressure 4. With both DCV in their mid position, the flow of fluid from the pump returned to tank through what component? a. The solenoid operated DCV b. The relief valve c. One of the actuators d. The manual operated DCV 5. The DCV’s lever must be shifted and held for high speed rotation of the motor in this circuit. a. True or b. False 6. With the manually operated DCV in its center condition and the relief valve’s vent line non-passing, the drill motor would not rotate at high speed enough though its ’ solenoid was activated. Why? a. The pump could not develop enough pressure b. The fluid flowed through the relief valve vent line back to tank c. The fluid flowed through the center condition of the manually operated DCV d. System pressure was limited by the relief valve

College Credits: Paul Bligdon Page 3 Industrial Hydraulics for Colleges Week 6 7. When the clamp cylinder is moving (during advance or retract) the pressure seen on the systems main pressure gauge is determined by: a. The relief valve’s setting b. The load on the motor and resistance to flow throughout the system c. The pump’s delivery (volume) d. The load on the cylinder and resistance to flow throughout the system 8. The pressure seen on the system’s main pressure gauge ; when the cylinder was fully extended and the manually DCV lever was shifted and held, was determined by: a. The relief valve’s setting b. The load on the motor and resistance to flow throughout the system c. The pump’s delivery (volume) d. The load on the cylinder and resistance to flow throughout the system 9. The pressure seen on the system’s main pressure gauge; when the cylinder was fully extended; the manually DCV lever shifted and held and the motor was rotating at high speed is determined by: a. The relief valve’s setting b. The load on the motor and resistance to flow throughout the system c. The pump’s delivery (volume) d. The load on the cylinder and resistance to flow throughout the system 10. If this circuit were used in industry, the operator of this clamp and drill fixture could rotate the drill at high speed without first clamping the work piece. a. True or b. False 11. To conserve electrical and hydraulic energy when the operator is not performing any “work” (machine idle), the operator must turn the relief valve’s vent handle to the passing position a. True or b. False 12. The statement P*B, A*T, indicates the position of a directional control valve which will: a. Advance the cylinder b. Retract the cylinder c. Stop the cylinder d. None of the above 13. How many flow paths are there in a typical 4 way directional control valve? a. One flow path b. Two flow paths c. Three flow paths d. Four flow paths

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College Credits: Paul Bligdon Page 4 Industrial Hydraulics for Colleges Week 6 14. Which of the flowing air gap solenoid component comes in direct contact with the directional control valve’s spool? a. Manual override pin b. Push pin c. Springs d. Lever ANSI Circuit: Automation Studio