PROPERTIES OF FLUIDS (17mks) 1. A concentric viscometer may be formed by rotating the inner member of a pair of closely fitting cylinders and placing a fluid in the gap between the two cylinders. If the inner cylinder has a diameter of 75mm and a height of 150mm and the gap between the two cylinders is 2cm, determine the force required for the inner cylinder to rotate at 400rpm given that the fluid between the cylinders is oil with a dynamic viscosity of 530 x 10-3 kg/ms (6mks) 2. A shaft with an outside diameter of 18mm turns at 20 revolutions per second inside a stationary journal bearing that is 60mm long. A thin film of oil 0.2mm- thick fills the space between the shaft and the journal. The torque needed to turn the shaft is 0.0036Nm. Estimate the kinematic viscosity of the oil that fills the gap given that the specific volume of the oil is 1.176 x 10-3 kg/ms (11mks) Meriam red o SG=0827 PRESSURE IN FLUIDS (8mks) 3. For the inverted manometer shown in the figure, determine the height H given that PA-Pa = 97kPa (8mks) Water 18 cm H 35 cm H W Mercury bocbc=N=1 t=he c wyg HYDROSTATIC FORCES (21mks) fa 4. A gate, in the shape of a quarter cylinder with at radius of 2m, hinged at A and sealed at B is 2m wide as shown in the figure. The bottom of the gate is 3m below the water surface. Determine the total force on the stop at B and the angle at which the tatic force acts in the gate if the gate is made of concrete (S.G= 2.4). (12mks) Memes placed TARYA