Download PTU B.Tech 2020 March ME 4th Sem Fluid Mechanics Question Paper

Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) ) BE/BTech ME (Mechanical Engineering) 2020 March 4th Sem Fluid Mechanics Previous Question Paper

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Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(ME) (2012 Onwards) (Sem.?4)
FLUID MECHANICS
Subject Code : BTME-403
M.Code : 59131
Time : 3 Hrs. Max. Marks : 60
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
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.

SECTION-A
1. Answer briefly :
(a) Define term dynamic viscosity and mention their unit.
(b) What do you understand by centre of pressure?
(c) Define the term meta centric height.
(d) Write two properties of stream function.
(e) What do you understand by uniform and non uniform flow?
(f) State Bernoulli's equation and write the equation for real fluid.
(g) What is the difference between model and prototype?
(h) What are the various minor losses?
(i) Define Froude's number.
(j) What is a weir?
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1 | M C o d e 5 9 1 3 1 ( S 2 ) - 2 0 2 0
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(ME) (2012 Onwards) (Sem.?4)
FLUID MECHANICS
Subject Code : BTME-403
M.Code : 59131
Time : 3 Hrs. Max. Marks : 60
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
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.

SECTION-A
1. Answer briefly :
(a) Define term dynamic viscosity and mention their unit.
(b) What do you understand by centre of pressure?
(c) Define the term meta centric height.
(d) Write two properties of stream function.
(e) What do you understand by uniform and non uniform flow?
(f) State Bernoulli's equation and write the equation for real fluid.
(g) What is the difference between model and prototype?
(h) What are the various minor losses?
(i) Define Froude's number.
(j) What is a weir?
2 | M C o d e 5 9 1 3 1 ( S 2 ) - 2 0 2 0
SECTION-B
2. Derive an expression for total force and centre of pressure for horizontal plane surface
submerged in liquid.
3. A block of wood of specific gravity 0.7 floats in water. Determine the meta-centric height
of the block if its size is 2m ? lm ? 0.8m.
4. If for a two dimensional stream function is 2xy, determine the velocity at point P(2,3).
Also calculate the value of potential function at point P.
5. A pipeline carrying oil of specific gravity 0.87, changes in diameter from 200mm
diameter at position A to 500mm diameter at a position B which is 4m at a higher level.
If the pressures at A and B are 9.81 N/cm
2
and 5.886 N/cm
2
respectively and discharge is
200 liters/s determine loss of head.
6. Find the kinematic viscosity of oil having density 981kg/m
3
. The shear stress at a point in
oil is 0.2452N/m
2
and velocity gradient at that point is 0.2 per second.

SECTION-C
7. Derive an expression for the loss of head due to friction in pipes.
8. The pressure difference in a pipe of diameter D and length 1 due to turbulent flow
depends on the velocity, dynamic viscosity, density and roughness k. Using Buckingham
pi theorem express pressure in terms of dimension less parameters.
9. An open channel of most economical section, having the form of a half hexagon with
horizontal bottom is required to give a maximum discharge of 20.2m
3
/s of water. The
slope of the channel bottom is 1 in 2500. Taking Chezy?s constant 60, determine the
dimensions of the cross-section.




NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 21 March 2020