Deemed University 2010 B.Tech Civil Engineering University: Lingayas University Term: III Title of the : Fluid Mechanics - I - Question Paper
Roll No. ..
Lingayas University, Faridabad
Examination December, 2009
Course: B.Tech. Year: IInd
Semester: III Paper Code: CE-205E
Subject: Fluid Mechanics - I
[Time: 3 Hours] [Max. Marks: 100]
Before answering the question, candidate should ensure that they have been supplied the correct and complete question paper. No complaint in this regard, will be entertained after examination.
Note: Attempt in all Five Questions. Attempt at lest one question from each part. Draw neat sketches wherever required.
Q-1 (a) Define and explain the following terms:
Specific weight, Capillarity, Vacuum Pressure Kinematics
Viscosity,
Centre of pressure, compressibility. (12)
(b) Distinguish between: (8)
(i) Real and ideal fluids
(ii) Steady and unsteady flow.
Q-2. (a) State and prove Eulers equation of motion. Obtain Bernoullis equation from Eulers equations. (20)
Q-3. (a) Find the size of a pipe, which has to discharge an oil at the rate of 2m3/s and of specific gravity 0.8 with a velocity of 3m/s. (8)
(b) A tube inserted in a pipe is carrying oil of sp. Gravity 0.90. If the oil rises in the tube to a height of 600 mm. Find the pressure in the pipe and the pressure head in meters of water. (12)
Q-4. The water is flowing through a pipe having diameter 200 mm and 100 mm at section 1-1 and section 2-2 respectively. The rate of flow through the pipe is 35 lit/sec. The section 1-1 is 6 m above datum and section 2-2 is 4m above datum. If the pressure at section 1-1 is 400 kn/m2, find the intensity of pressure at section 2-2. (20)
P.T.O.
Q-5. (a) The head of water over the centre of an orifice of diameter 30 mm is 1.5 m. The actual discharge through the orifice is 2.35 lit/sec. Find the co-efficient of discharge. (10)
(b) Find the discharge from a 80 mm diameter external mouth piece fitted to a side of a large vessel, if the head over the mouthpiece is 6 m. (10)
Q-6. A circular plate 1.0m diameter is immersed in water so that the least and the greatest depths of the plate from the water surface are 2 m and 3 m respectively. Find the total pressure on the plate and the depth of centre of pressure. (20)
Q-7. Explain the concept of boundary layer. Obtain an expression for the drag co-efficient. (20)
Q-8. Write short notes on the following (any four)
(i) Flow nets and its uses.
(ii) Meta centre & meta centric height
(iii) Mach number and its applications.
(iv) Buckingham p- theorem.
(v) Kinematics & dynamic similarity
(vi) Aeration of nappe
(vii) Limitations of Bernoullis equation. (4x5 = 20)
Roll No. ..
Lingayas University, Faridabad
Examination December, 2009
Course: B.Tech. Year: IInd
Semester: III Paper Code: CE-205E
Subject: Fluid Mechanics - I
[Time: 3 Hours] [Max. Marks: 100]
Before answering the question, candidate should ensure that they have been supplied the correct and complete question paper. No complaint in this regard, will be entertained after examination.
Note: Attempt in all Five Questions. Attempt at lest one question from each part. Draw neat sketches wherever required.
Q-1 (a) Define and explain the following terms:
Specific weight, Capillarity, Vacuum Pressure Kinematics
Viscosity,
Centre of pressure, compressibility. (12)
(b) Distinguish between: (8)
(i) Real and ideal fluids
(ii) Steady and unsteady flow.
Q-2. (a) State and prove Eulers equation of motion. Obtain Bernoullis equation from Eulers equations. (20)
Q-3. (a) Find the size of a pipe, which has to discharge an oil at the rate of 2m3/s and of specific gravity 0.8 with a velocity of 3m/s. (8)
(b) A tube inserted in a pipe is carrying oil of sp. Gravity 0.90. If the oil rises in the tube to a height of 600 mm. Find the pressure in the pipe and the pressure head in meters of water. (12)
Q-4. The water is flowing through a pipe having diameter 200 mm and 100 mm at section 1-1 and section 2-2 respectively. The rate of flow through the pipe is 35 lit/sec. The section 1-1 is 6 m above datum and section 2-2 is 4m above datum. If the pressure at section 1-1 is 400 kn/m2, find the intensity of pressure at section 2-2. (20)
P.T.O.
Q-5. (a) The head of water over the centre of an orifice of diameter 30 mm is 1.5 m. The actual discharge through the orifice is 2.35 lit/sec. Find the co-efficient of discharge. (10)
(b) Find the discharge from a 80 mm diameter external mouth piece fitted to a side of a large vessel, if the head over the mouthpiece is 6 m. (10)
Q-6. A circular plate 1.0m diameter is immersed in water so that the least and the greatest depths of the plate from the water surface are 2 m and 3 m respectively. Find the total pressure on the plate and the depth of centre of pressure. (20)
Q-7. Explain the concept of boundary layer. Obtain an expression for the drag co-efficient. (20)
Q-8. Write short notes on the following (any four)
(i) Flow nets and its uses.
(ii) Meta centre & meta centric height
(iii) Mach number and its applications.
(iv) Buckingham p- theorem.
(v) Kinematics & dynamic similarity
(vi) Aeration of nappe
(vii) Limitations of Bernoullis equation. (4x5 = 20)
| Earning: Approval pending. |
