DEPARTMENT OF TECHNICAL EDUCATION
DIPLOMA IN CIVIL ENGINEERING(D’SHIP) FOURTH SEMESTER
SUBJECT: HYDRAULICS
MODEL QUESTION PAPER
Duration : 3 Hours Max. Marks: 100
Instructions: 1. SECTION-I is compulsory.
2. Answer any two full questions from the remaining sections
| SECTION-I | |||
| Q1 | (a) | Fill in the blanks | 1 x 5=05 |
| | (i) | ………. is an instrument used to determine fluid pressure | |
| | (ii) | The relationship between three hydraulic co-efficient is given by ………………… | |
| | (iii) | …………. is an hydraulic device used to convert mechanical energy to hydraulic energy | |
| | (iv) | The condition for orifice to be large is …………… | |
| | (v) | ……… is used to determine discharge flowing through a pipeline | |
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| | (b) | What are manometers? List and explain any one type | 05 |
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| SECTION-II | |||
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| Q2 | (a) | Define the following i) specific gravity ii) specific weigh iii) viscosity iv) surface tension v)capillarity | 05 |
| | (b) | Determine pressure of a liquid of specific gravity 1.25 at a depth 10m below its free surface. | 05 |
| | (c ) | Define total pressure and centre of pressure | 05 |
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| Q3 | (a) | A circular plate of diameter 3m is immersed in water in such a way that its centre is at a depth of 5m below the free surface. Determine the total pressure and centre of pressure exerted by the liquid on the plate | 07 |
| | (b) | What are sluice gates? Explain its practical application | 03 |
| | (c ) | Differentiate between a) steady flow and unsteady flow b) uniform and non uniform flow | 05 |
| Q4 | (a) | What are the limitations of Bernoulli’s theorem | 03 |
| | (b) | A circular pipe tapered in section is 100mm diameter at one end which is 2m above datum and 250mm diameter at other end which is 6m above datum. The pressure and velocity of water flowing at lower end is 200 KN?m2 and 10m/sec respectively. Determine the pressure at the other end | 06 |
| | (c ) | A venturimeter 200 X 100 mm is used to determine discharge of water flowing through a pipe. The U-Tube differential mercury manometer fitted shows a differential reading of 40 mm. Determine the discharge of water flowing through the pipe | 06 |
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| SECTION-III | |||
| Q5 | (a) | What are orifices? Mention its different types and explain any one type | 05 |
| | (b) | An orifice of 20mm diameter is provided to determine discharge of water flowing through the tank. The depth of water is 4m above the centre of the orifice. Determine discharge of water flowing through the orifice | 06 |
| | (c ) | Differentiate between submerged and partially submerged orifice | 04 |
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| Q6 | (a) | What are mouth pieces? Mention its different types and explain Borda’s mouth piece | 05 |
| | (b) | Determine discharge through a rectangular notch having breadth 100mm and depth of flow over the crest of the notch being 28mm. The co-efficient of discharge being 0.6 | 06 |
| | (c ) | Mention the advantages of V-notch over rectangular notch | 04 |
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| Q7 | (a) | Mention different types of weirs? Explain their practical application | 04 |
| | (b) | A rectangular weir is used to determine a discharge of 3m/sec. The maximum depth of flow over the weir is being 100mm. Determine the breadth of the weir to allow the above discharge. Take Cd of the weir as 0.6 | 07 |
| | (c ) | Mention the difference between notch and weir | 03 |
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| SECTION-IV | |||
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| Q8 | (a) | Define most economical section | 04 |
| | (b) | Design most economical rectangular section to carry a discharge of 10m3/sec given Chezy’s constant 55 and bed slope 1 in 1500 | 08 |
| | (c ) | Define hydraulic gradient line and total energy line | 03 |
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| Q9 | (a) | An earthen channel with a 3m wide base and sied slopes 1:1 carries water with a depth of 1m. The bed slopes is 1 in 1600. Estimate the discharge. Take value of N in Manning’s formula as 0.04 | 08 |
| | (b) | A reservoir has been built 4km away from a college campus having 5000 inhabitants. Water is to be supplied from the reservoir to the campus. It is estimated that each inhabitant will consume 200 liters of water per day and that half of the daily supply is pumped within 10 hours. Calculate the size of the supply main, if the loss of head due to friction in pipeline is 20m. Assume co-efficient of friction for the pipeline as 0.008 | 07 |
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| Q10 | (a) | Find the loss of head due to friction in a pipe of 500mm diameter and 1.5km long. The velocity of water in the pipe is 1meter per sec. take co efficient of friction as 0.005 | 05 |
| | (b) | Explain the working principle of reciprocating pump | 05 |
| | (c ) | Differentiate between impulse and reaction turbine | 05 |
