Seat No.: ________ Enrolment No.______________
GUJARAT TECHNOLOGICAL UNIVERSITY
Diploma Engineering - SEMESTER – III • EXAMINATION – WINTER 2012
Subject code: 330602 Date: 03/01/2013
Subject Name: Hydraulics
Time: 02.30 pm - 05.00 pm Total Marks: 70
Instructions:
1. Attempt any five questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. English version is considered to be Authentic.
Q.1 (a)
Attempt the following:
The branch of fluid mechanics dealing with the behaviour of water, when it is in motion,
with reference to the forces responsible for flow, is known as ___________.
(a)Hydrostatics (b)Hydrokinetics (c)Hydrokinematics (d)Hydrodynamics
A fluid which is incompressible, and is having no viscosity, no surface tension, is known
as______________ fluid.
(a) an Ideal (b) a Real (c) a Newtonian (d) an Ideal Plastic
The ratio of total weight of a fluid to its volume at standard temperature and pressure is
known as____________________.
(a) density (b) specific weight (c) specific gravity (d) specific volume
The unit of surface tension is ______________.
(a) N/m (b) N/m2
(c) N/m3
(d) N-m
The property of fluid which offers resistance to the movement of one layer of fluid over
another adjacent layer of fluid is called______________.
(a) surface tension (b) capillarity (c) compressibility (d) viscosity
The atmospheric pressure at sea level, is____________.
(a)101.4 kN/m2
(b)10.34 m of water (c)0.76 m of mercury (d)all of these
The pressure at a point 4m below the free surface of water is____________.
(a) 19.24 kPa (b) 29.24 kPa (c) 39.24 kPa (d) 49.24 kPa
07
(b) Convert the following:
(1) 0.38 m of mercury column in to kiloPascal ,
(2) 1.6 m column of liquid with Sp.Gr. 0.9 into in to N/mm2
04
(c) Explain with sketch: Atmospheric pressure, Gauge pressure & Absolute pressure. 03
Q.2 (a) State and Explain Pascal’s law. 07
(b) Derive an equation for total pressure and centre of pressure for a plane body vertically
immersed in water. OR
07
(b) An isosceles triangular plate of 1.5 m base and 1.8 m height is fully immersed in water
vertically with its apex below the base. The base is parallel to and at a depth of 0.5 m
below the free water surface.
Calculate:
(i) Total pressure on plate,
(ii) Depth of centre of pressure on plate from the water surface.
07
Q.3 (a) State types of flow. Explain Steady-Uniform flow. 07 2/4
(b) State and derive Bernoulli’s Equation. 07
OR
Q.3 (a) Describe the assumptions and limitations of Bernoulli’s Equation. 07
(b) A fluid having Sp.Gr. 0.9 is flowing through a pipe of 20 cm diameter. If rate of flow is
60 lit/s and viscosity of the fluid is 0.8 poise, decide the type of flow.
07
Q.4 (a) A venturimeter with a 30cm diameter at the inlet and 20 cm throat is laid with its axis
horizontal and is used to measure the flow of oil of specific gravity 0.85 . The oil
mercury differential manometer shows a gauge difference of 20 cm. Assuming
coefficient of the Venturimeter as 0.98, calculate the discharge in litres per minute.
07
(b) Compare pipe flow and open channel flow. Give the losses in pipe flow. 07
OR
Q. 4 (a) A jet of water issued from a 2 cm diameter sharp edged orifice and a constant head of
250 cm. Vertical and horizontal co-ordinates of a point on the jet measured from vena
contracta are 40 cm and 180 cm respectively. If Cc = 0.64, calculate:
(i) Co-efficient of discharge
(ii) Diameter of jet at vena contracta
(iii) Actual velocity .
07
(b) A trapezoidal channel has a bed width of 4.0 m, side slope of 1V=2H and its bed slope is
1:2000. If the depth of flowing water in the channel is 0.6 m, find the discharge. Take
C=50.
07
Q.5 (a) Draw and explain Specific Energy diagram. 07
(b) Water flows over a rectangular weir 2m wide at a depth of 16 cm and afterwards passes
through a triangular right-angled notch. Find the depth of water over the triangular
notch. Taking Cd for the rectangular weir and for triangular notch as 0.63.
07
OR
Q.5 (a) Explain Hydraulic Jump with its practical uses. 07
(b) Explain working of a centrifugal pump with a neat sketch. 07
GUJARAT TECHNOLOGICAL UNIVERSITY
Diploma Engineering - SEMESTER – III • EXAMINATION – WINTER 2012
Subject code: 330602 Date: 03/01/2013
Subject Name: Hydraulics
Time: 02.30 pm - 05.00 pm Total Marks: 70
Instructions:
1. Attempt any five questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
4. English version is considered to be Authentic.
Q.1 (a)
Attempt the following:
The branch of fluid mechanics dealing with the behaviour of water, when it is in motion,
with reference to the forces responsible for flow, is known as ___________.
(a)Hydrostatics (b)Hydrokinetics (c)Hydrokinematics (d)Hydrodynamics
A fluid which is incompressible, and is having no viscosity, no surface tension, is known
as______________ fluid.
(a) an Ideal (b) a Real (c) a Newtonian (d) an Ideal Plastic
The ratio of total weight of a fluid to its volume at standard temperature and pressure is
known as____________________.
(a) density (b) specific weight (c) specific gravity (d) specific volume
The unit of surface tension is ______________.
(a) N/m (b) N/m2
(c) N/m3
(d) N-m
The property of fluid which offers resistance to the movement of one layer of fluid over
another adjacent layer of fluid is called______________.
(a) surface tension (b) capillarity (c) compressibility (d) viscosity
The atmospheric pressure at sea level, is____________.
(a)101.4 kN/m2
(b)10.34 m of water (c)0.76 m of mercury (d)all of these
The pressure at a point 4m below the free surface of water is____________.
(a) 19.24 kPa (b) 29.24 kPa (c) 39.24 kPa (d) 49.24 kPa
07
(b) Convert the following:
(1) 0.38 m of mercury column in to kiloPascal ,
(2) 1.6 m column of liquid with Sp.Gr. 0.9 into in to N/mm2
04
(c) Explain with sketch: Atmospheric pressure, Gauge pressure & Absolute pressure. 03
Q.2 (a) State and Explain Pascal’s law. 07
(b) Derive an equation for total pressure and centre of pressure for a plane body vertically
immersed in water. OR
07
(b) An isosceles triangular plate of 1.5 m base and 1.8 m height is fully immersed in water
vertically with its apex below the base. The base is parallel to and at a depth of 0.5 m
below the free water surface.
Calculate:
(i) Total pressure on plate,
(ii) Depth of centre of pressure on plate from the water surface.
07
Q.3 (a) State types of flow. Explain Steady-Uniform flow. 07 2/4
(b) State and derive Bernoulli’s Equation. 07
OR
Q.3 (a) Describe the assumptions and limitations of Bernoulli’s Equation. 07
(b) A fluid having Sp.Gr. 0.9 is flowing through a pipe of 20 cm diameter. If rate of flow is
60 lit/s and viscosity of the fluid is 0.8 poise, decide the type of flow.
07
Q.4 (a) A venturimeter with a 30cm diameter at the inlet and 20 cm throat is laid with its axis
horizontal and is used to measure the flow of oil of specific gravity 0.85 . The oil
mercury differential manometer shows a gauge difference of 20 cm. Assuming
coefficient of the Venturimeter as 0.98, calculate the discharge in litres per minute.
07
(b) Compare pipe flow and open channel flow. Give the losses in pipe flow. 07
OR
Q. 4 (a) A jet of water issued from a 2 cm diameter sharp edged orifice and a constant head of
250 cm. Vertical and horizontal co-ordinates of a point on the jet measured from vena
contracta are 40 cm and 180 cm respectively. If Cc = 0.64, calculate:
(i) Co-efficient of discharge
(ii) Diameter of jet at vena contracta
(iii) Actual velocity .
07
(b) A trapezoidal channel has a bed width of 4.0 m, side slope of 1V=2H and its bed slope is
1:2000. If the depth of flowing water in the channel is 0.6 m, find the discharge. Take
C=50.
07
Q.5 (a) Draw and explain Specific Energy diagram. 07
(b) Water flows over a rectangular weir 2m wide at a depth of 16 cm and afterwards passes
through a triangular right-angled notch. Find the depth of water over the triangular
notch. Taking Cd for the rectangular weir and for triangular notch as 0.63.
07
OR
Q.5 (a) Explain Hydraulic Jump with its practical uses. 07
(b) Explain working of a centrifugal pump with a neat sketch. 07
No comments:
Post a Comment