Janardan Rai Nagar Rajasthan Vidyapeeth 2006 B.Tech Civil Engineering HYDRULICS / FLUID MECHANICS - Question Paper

Model Question Paper

BSC3-BSM3- HYDRULICS / FLUID MECHANICS

Time : 3 hrs Maximum marks : 75

 

Instruction:

1. Question paper is divided into Group A, Group B and Group C

2. Each Group is 25 Marks

3. Figure to the right in bracket indicates marks.

4. Good Handwriting is expected

5. Assume suitable data if necessary.

 

Group A (25 Marks)

 

Answer any three questions (Question 1 is compulsory)

	(5)

 

Q.1 Define following terms

i) Density ii) Specific weight iii) Specific volume iv) Specific gravity

(10)

v) Viscosity

(10)

Q.2 State & explain Bernoullis Theorem for liquids

Q.3 Explain coefficient of contraction, coefficient of velocity the coefficient of

(10)

Discharge , coefficient of resistance ?

Q.4 Derive an expression for discharge through open channel by cherys formula ?

(10)

Q.5 Explain various forms of energies in fluid flow ?

Group B (25 Marks)

Answer any three questions (Questions 6 is compulsory)

	(5)

 

Q.6 A pipe line which is 5m in diameter. Contains a gate valve. The pipe contains oil

of specific gravity 0.87 . The pressure at the centre of pipe is 2 kg /cm². Find the

force exerted by the oil upon the gate and the position of the centre of pressure?

(10)

Q.7 An orifice meter with orifice diameter 10cm is inserted in a pipe of 20 cm diameter

The pressure gauges fitted upstream and downstream of the orifice meter given

Reading of 19.12 N/cm² and 9.81 N/cm² respectively. Co-efficient of discharge for the

Meter is given as 0.6 . Find the discharge of water through pipe.

 

(10)

Q.8 A pipe of diameter 300 mm and length 3500 m is used for the transmission of power

by water. The total head at the inlet of pipe is 500 m. Find the maximum power

available at the outlet of pipe. If the value of f = 0.006 ?

Q.9 A uniform body of size 3 m long x 2 m wide x 1 m deep floats in water. What is the weight

(10)

of the body if depth of immersion is 0.8 m ? Determine meta centric height ?

 

 

 

Q.10. A horizontal venturimeter with inlet and throat diameters 30 cm and 15cm respectively is used

to measure the flow of water. The reading of differential manometer connected to the inlet and

(10)

the throat is 20 cm of mercury. Determine the rate of flow . Take cd = 0.98

 

Group C (25 Marks)

 

All Questions are Compulsory.

 

Q.11 Fill in the blanks ( each question carry 2 marks)

 

1. A pitot tube is used to measure _______

2. Hydraulic coefficient of an orifice means the coefficient of ________

3. The ratio of friction factor and coefficient of friction used in general equation for a head loss in

pipe is __________

4. The inclined position venturimeter records _________

5. The differential equation for a fluid motion is suggested by __________

Q.11 Multiple choice question. (Each question carry 2 marks)

 

1. In centrifugal pump casing , the flow of water leaving the impeller is ________

2. The velocity of fluid particle at the centre of pipe section is

a) Minimum b) Maximum c) Equal throughout d) None of these

3. Critical depth of channel is

a) h = b) h = c) h = d) h =

4. To avoid the force of surface tension in an inclined manometer the minimum angle of inclination

is

a) 2⁰ b) 3⁰ c) 4⁰ d) 5⁰

5. In C.G.S. system the unit of viscosity is

a) Dyne b) Joule c) Poise d) Newton

 

Q.11 True or false (each question carry 1 marks).

1. Specific weight of sea water is more than that of pure water because of dissolved air.

2. Fluid change volume under external pressure due to compressibility .

3. Total pressure on the top of closed cylindrical vessel completely filled with liquid is directly

proportional to (radius) ⁴.

4. The velocity of fluid particle at the centre of pipe section is minimum.

5. The most familiar form of Bernoulls equation is

 

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