Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) ) BE/BTech Civil Engineering (CE) 2020 March 3rd Sem BTCE 301 Fluid Mechanics I Previous Question Paper
1 | M-56072 (S2)-1396
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(CE) (2012 to 2017) (Sem.?3)
FLUID MECHANICS-I
Subject Code : BTCE-301
M.Code : 56072
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
Q1. Answer briefly :
a) If the specific gravity of a liquid is 3.0, calculate its specific weight.
b) What is the function of the U tube simple manometer?
c) Define Pathline of a fluid particle.
d) ?A free vortex flow has the velocity decreasing with radius?. Justify the statement
with reasons.
e) What will be the position of centre of gravity and metacentre for a body floats in
stable equilibrium?
f) What is the scale ratio for time in model analysis according to Froude?s number?
g) Write the expression for the determination of drag force for a body moving through a
fluid of mass density ? at a uniform velocity V.
h) Define velocity of approach in the expression of discharge over a weir.
i) Write the various components of a venturimeter.
j) Write the dimension of dynamic viscosity.
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1 | M-56072 (S2)-1396
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(CE) (2012 to 2017) (Sem.?3)
FLUID MECHANICS-I
Subject Code : BTCE-301
M.Code : 56072
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
Q1. Answer briefly :
a) If the specific gravity of a liquid is 3.0, calculate its specific weight.
b) What is the function of the U tube simple manometer?
c) Define Pathline of a fluid particle.
d) ?A free vortex flow has the velocity decreasing with radius?. Justify the statement
with reasons.
e) What will be the position of centre of gravity and metacentre for a body floats in
stable equilibrium?
f) What is the scale ratio for time in model analysis according to Froude?s number?
g) Write the expression for the determination of drag force for a body moving through a
fluid of mass density ? at a uniform velocity V.
h) Define velocity of approach in the expression of discharge over a weir.
i) Write the various components of a venturimeter.
j) Write the dimension of dynamic viscosity.
2 | M-56072 (S2)-1396
SECTION-B
2. A rectangular plate of size 25 cm ? 50 cm and weighing 250 N slides down a 25?
inclined surface at a uniform velocity of 1.5 m/s. If the uniform gap of 2 mm between the
plate and the inclined surface is filled with oil, determine the viscosity of oil.
3. A trapezoidal plate of 6 m wide at top, 3 m wide at bottom and 1.5 m deep is used to
close an opening of the same size. The water on one side of trapezoidal plate is just level
at the top of the plate and the other side of plate is empty. Calculate the total pressure and
centre of pressure on the plate.
4. The velocity field in a flow is given by u = x
2
+2xy; v = y
2
+2xy. Determine the
circulation around a closed curve defined by (1,1), (3,1), (3,4) and (1,4).
5. Define velocity of approach. How can you account for it while computing discharge over
weirs?
6. Derive the expression for kinetic energy correction factor.
SECTION-C
7. Determine the form of the equation for discharge Q through a sharp-edged triangular
notch using Buckingham ? theorem assuming Q depends on the central angle ? of the
notch, head H, acceleration due to gravity g, density of fluid ?, viscosity of fluid ? and
surface tension ? of the fluid.
8. A cylinder 1.2 m in diameter is rotated about its axis in air having a velocity of
128 km/hour. A lift of 5886 N/m length of the cylinder is developed on the body.
Assuming ideal fluid theory, find the rotational speed and the location of stagnation
points. Density of air is 1.236 kg/m
3
.
9. Derive the Bernoulli?s equation mentioning the assumptions used for the derivations.
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