Review Questions

REVIEW QUESTIONS

On Design of Hydraulic/Pneumatic Circuits for Industrial Applications

1. With a suitable circuit diagram, explain the hydraulic system used in a drilling machine.

2. Describe a hydraulic circuit employed in a shaper machine.

3. Design a hydraulic circuit for a surface grinding machine application.

4. Draw and explain a hydraulic circuit for press application. (or) Design a hydraulic press circuit using unloading valve with sketch.

[A.U., May/June 2006; Apr/May 2018]

[Ans. Refer Section 16.7]

5. Design and explain the hydraulic circuit for forklift application.

6. Explain with a pneumatic circuit how pick and place robot gripper actuation is achieved.

7. Design and explain a pneumatic circuit for tool handling in CNC machine tool.

On System Design

8. Describe various selection criteria for pneumatic components. (or) Enunciate various criteria for the selection of pneumatic components

[A.U., Apr/May 2005; Nov/Dec 2005; Nov/Dec 2007; Apr/May 2008; Nov/Dec 2008] 

[Ans. Refer Section 16.12]

9. A machine tool slide is moved by means of a hydraulic cylinder as follows:

• Initially it moves through a distance of 200 mm against a load of 12 kN in about 3 seconds.

• It is followed by a working stroke of 100 mm against an effective load of 35 kN. The feed rate during this part of the stroke is required to be between 0.5 to 1 m/min.

• The return stroke is as fast as possible.

A meter-out type of circuit is used.

(a) Draw the suitable hydraulic circuit for the above requirement.

(b) Select different components used in the circuit.

On Low Cost Automation and Power Packs 

10. Explain the principle of low cost automation.

[A.U., May/June 2006; Nov/Dec 2006] 

[Ans. Refer Section 16.15]

11. Explain the application of hydraulic system for low cost automation with suitable examples.

[A.U., Apr/May 2005] 

[Ans. Refer Section 16.16] 

12. Explain the application of pneumatic system for low cost automation with suitable examples.

[A.U., Apr/May 2005] 

[Ans. Refer Section 16.17] 

13. What are hydraulic power packs? Explain the various components and working of a hydraulic power pack.

14. What are pneumatic power packs? Explain the various components and working of a pneumatic power pack.