No. Question 1· Answer 1 Name measurement units of viscosity What is Clapeyron\'

Question

No. Question 1· Answer 1 Name measurement units of viscosity What is Clapeyron's equatiom? 2. Name at least 3 disadvantages of hydraulic systems 3. 4. Does pump create pressure or flow? 5. What is state equation of liquid? 6. | What is the function and symbol of 7. What is Turbulent flow? 8. What is hydraulic radius? 9. What is continuity equation? flow regulator? 10. Which valve is suitable for constant speed adjustment under non constant load - throttle valve or flow regulator? 11. What are the main physical values Darcy - Weisbach equation? 12. What determines the rotation speed of the hvdraulic motor?

Explanation / Answer

1) This is the SI unit of viscosity, equivalent to newton-second per square metre (N·s m2). It is sometimes referred to as the poiseuille (symbol Pl).

2) More generally the Clausius-Clapeyron equation pertains to the relationship between the pressure and temperature for conditions of equilibrium between two phases. The two phases could be vapor and solid for sublimation or solid and liquid for melting.

(dP/dT) = (hg - hf) / T(vg - vf)

3) • Handling of hydraulic oils which can be quite messy. It is also very difficult to completely eliminate leakage in a hydraulic system.
• Hydraulic lines can burst causing serious human injuries.
• Most hydraulic fluids have a tendency to catch fire in the event of leakage, especially in hot regions.

4) When the liquid slows down in the pump casing some of the kinetic energy is converted to pressure energy. It is the resistance to the pump's flow that is read on a pressure gauge attached to the discharge line. Note!!! A pump does not create pressure, it only creates flow.

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