HYDRAULICS MODEL QUESTION PAPER DIPLOMA IN CIVIL ENGINEERING(D'SHIP) 4TH SEMESTER

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

 

 

 

 

 

 

(b)

What are manometers? List and explain any one type

05

 

 

 

 

SECTION-II

 

 

 

 

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

 

 

 

 

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

 

 

 

 

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

 

 

 

 

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

 

 

 

 

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

 

 

 

 

SECTION-IV

 

 

 

 

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

 

 

 

 

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

 

 

 

 

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

 

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