Fluid Mechanics and Machinary, Question Paper of B.Tech 4th Semester,Download Previous Years Question Paper 6

Roll No. ......................

Total No. of Questions : 09]

B.Tech. (Sem. – 4th)

FLUID MECHANICS AND MACHINARY

SUBJECT CODE : AE – 206

Paper ID : [A0711]

Time : 03 Hours

INSTRUCTION TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying

TWO marks each.

2. SECTION-B contains FIVE questions carrying FIVE marks each and

students has to attempt any FOUR questions.

3. SECTION-C contains THREE questions carrying TEN marks each and

students has to attempt any TWO questions.

SECTION-A

l. Answer briefly :

a. If K(bulk modulus of water) = 2.2GPa. What pressure is required to

reduce the volume by 0.5% ?

b. Differentiate between simple manometer and differential manometer

with neat sketches.

c. In what way a fluid contained in a vessel moving with constant

acceleration comes under the purview of hydrostatics?

d. Differentiate between tangential and normal acceleration.

e. Define free and forced vortex motions.

f. Why a triangular weir is more suitable than a rectangular weir for

measuring the discharge?

g. Write expressions for Mach number and Froude number. Explain the

physical significance of both the numbers.

h. Differentiate between suction head, delivery head and manometric

head of centrifugal pump.

i. What is difference between hydraulic coupling and torque converter?

j. What is the difference between tangential and radial flow turbines?

SECTION-B

2. A differential manometer is connected to two pipes whose centres are 3m

difference in height. Higher level pipe is carrying liquid of specific gravity

of 1.5 at a pressure of 1.8 bar and another pipe is carrying liquid at

specific gravity of 0.9 at a pressure of 1 bar. The centre of pipe carrying

low pressure liquid is 2m above the higher level of the mercury in the

manometer. Find out the difference in mercury level in the manometer

in cm.

3. Derive an expression for discharge from a vertical venturimeter.

4. Draw a neat sketch of hydraulic intensifier and explain its working.

5. The discharge over a spillway provided on the dam depends upon v,

(velocity of flow), L(depth of the throat), H (water head on spillway) and

g (acceleration due to gravity). Using Buckingham’s -theorem, show

that 

6. Derive an expression for Momentum correction factor.

SECTION-C

7. Two tanks 2.5 km long are connected by a pipe of 30 cm diameter. The

water level difference between two tanks is 10 m. Find the diameter of

another pipe which would provide twice the discharge of the first. Consider

f is same in both the cases and consider only frictional losses in both

cases.

8. A closed cylindrical vessel 1 m diameter and 2 m high is completely filled

with oil whose specific gravity is 0.85. It is rotated at 120 rpm. Find the

total pressure at the top, at the bottom and side of the vessel.

9. Write short notes on the following :

i) Discharge through a mouth piece

ii) Rotameter

iii) Hydraulic accumulator