VTU Question Paper Solution | Fluid Mechanics 4 Sem Mechanical | Civil | As Per New Scheme VTU Exam
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The dynamic viscosity of oil used for lubrication between a shaft and sleeve is
6poise. The shaft is of diameter 0.4m. It rotates at 190 rpm. Calculate the
power lost in the bearing for a sleeve length of 90mm. The thickness of the oil
film is 1.5mm.
A simple manometer is used to measure the pressure of oil (s = 0.8) flowing in
a pipeline. Its right limb is open to the atmosphere and the left limb is
connected to the pipe. The centre of the pipe is 90mm below the level of
mercury in the right limb. If the difference of mercury level in the two limbs is
150mm, determine the absolute pressure of oil in the pipe in KPa.
A square plate of diagonal 1.5m is immersed in water with its diagonal vertical
and upper corner 0.5m below the free surface of water. Find the hydrostatic
force on the plate and the depth of centre of pressure from free surface of
water.
A horizontal venturimeter with inlet diameter 20 cm and throat diameter 10
cm is used to measure the flow of water. The pressure at inlet is 17.658 N/cm2
and the vacuum pressure at the throat is 30 cm of Hg. Find the discharge of
water through venturi meter. Take Cd = 0.98.
Experiments were conducted in a wind tunnel with a wind speed of 50km per
hour on a flat plate 1m long and 1m wide. The density of air in 1.15 kg/m3.
The plate is kept at such an angle that coefficient of lift and drag are 0.75 and
0.15 respectively. Determine (i) Lift force (ii) Drag force (iii) Resultant force
(iv) Power exerted by air stream on the plate.
A supersonic aircraft flies at an attitude of 1.8 km where the temperature is
4C. Determine the speed of the aircraft if its sound is heard 4 seconds after its
passage over the head of an observer. Take R=287J/Kg K, =1.4
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