Lovely Professional University 2010 B.Tech Mechanical Engineering MEC207 Fluid Mechanics (Session Term I) - Question Paper
MEC 207: Fluid Mechanic*
Time Allowed 1 hour 30 Min Max. Mark*: 50
1. This paper contains 6 questions divtditi in thrse parts on 2 peges.
2. Part A ana B ere compulsory.
3. frf Pert C (Questions 4-e), attempt eoy 2 questions out of 3. Attempt a0 parts of the questions ohoson.
4. The marts assigned to tsch question sre shown at the and of each question In square brackets
5. Answer ott questions in serial otdsr _ ___
PART A
Qfc'ia) Brief about Newtonian Fhads and Classify Wds.
Tb) Explain about viscorty and bow I is sffedrt by tempwature?
<> Owe brief on ab&olut p<ssure and gauge pressures? fdf Wn*e me fyoe* o* #gu#*kim otfortng
(e) Give in idea about stream funotion. f5X2 *10)
02 (a) Drive and explain the Pascal's law. [5]
tk plate having an area of 0.6m* is sliding down the Inclined plane at 30* to the . taorisontaJ tth a velocity of 0.36m/s. There 'e cushion of fluid 1.8mm thick between the ple wd the plete . find the viscosity of the fluid if the weight of the plate is 2B0N ($)
FARTB
L 08AHw iwceleslriangubi pete of base 3m and altitude 3m is immecsed vertically in an el of specific gravity 0 the base of the plate coincides w4h the fr*e surface of ol.
{.Ostamiine (0 The total pressure on the plate
_0i) Centaf pressure rgi
solid cylinder 2m in diameter and 2m high is floating In weter with ita axle
vertical, If the specific gravity of the material of cylinder is 0.05 find its motacentric .height Stats alto whether the equilibrium is stable or unstable. [5]
PARTC
04. In two-dransiona! incompfWW flow, the fuid velocity componorti am gwen
by
*-4y and v -y-4x
Show that velocity potential aoste end determine to fcrm. Find afeo the stream function.
(10J
OK A 30cm diameter pipe, conveying water, branches Mo two pipe* of dometts 20cm
Vend i$cm respectively. If the avenge velocity in the 30efl*.<fi*meter pipe H fW
the ditcharge in this pipe. Also determine the velody in iSem pipe if the average
velocity in 20em pipe *2mfe
>9lawn sprinkler with two nozzle* of diamstef4cm each is connected across a top of water es shown in fig. The noutes are at a distance of 30cm and 20cm from the centre of the tap. The rate of flow of water tfwou0) tap dachaige w*tr in the downward dictiOA
n i20cm*/$ The noules Determine the angular speeo at which the - [
ijprinlcter wHJ rotate free. ____ -
fIfi----
ft
P
'I
Some importart PonrnJae:
qay .duWy l*. ta triangule r surface.
h T*pQfVjrrVt n]
|
Attachment: |
| Earning: Approval pending. |
