Question

Q3 a) If 1kg of mass is taken to the moon, would it still have a mass of 1 kg on the moon?

b) If the absolute pressure in a hydraulic system is 800 kPa, what is the gauge pressure?

c) What is meant by the viscosity of a hydraulic fluid?

d) For which two important hydrostatic principles is Pascal’s law used?

e) Why is pressure lost when there is flow along a pipe? Where does the pressure go?

Answer 1

a) Yes it will have the same mass but the weight of the mass will be decreased.

b) gauge pressure = absolute pressure - atmospheric pressure

= 800 kPa - 101.325 kPa

= 698.675 kPa

c) viscosity is defined as property of a fluid which offers resistance to the movement of one layer of fluid over another adjacent layer of the fluid.

d) The two important principles where pascal's law is used are pressure mesurement by manometers and hydraulic lift

e) pressure lost in the pipe is due to the friction in the pipe.This lost pressure energy due to friction is converted into heat.