Code No:RR210106
b)
SET-1
B.Tech II Year - I Semester Examinations, December 2011 FLUID MECHANICS (CIVIL ENGINEERING) Time: 3 hours Max. Marks: 80 Answer any five questions All questions carry equal marks --Discuss the important properties of fluids along with their units and practical significance. Two large plane surface are 25 mm. apart. This space is filled with glycerin of dynamic viscosity 0.804 N- s/m2. Find what force is required to drag a very thin plate of area 0.50 m2 between the two surfaces at a speed of 0.60 m/sec. i) If the plate is equidistant from the two surfaces ii) If the plate is 10 mm from one of the surfaces. [16]
.in
1.a)
RR
Define velocity gradient, cohesion, compressibility and real fluids. A U-tube differential manometer connects two pressure pipes A and B. Pipe A contains carbon tetrachloride having a specific gravity 1.594 under a pressure of 11.772 N / cm 2 and pipe B contains oil of sp.gr.0.8 under pressure of 11.772 N / cm 2 . The pipe A lies 2.5 m above pipe B. Find the difference of pressure measured by mercury as fluid filling U-tube. [16]
3.a)
Define stream line, path line and streak line. Derive mathematical expressions for each of these lines. The water is flowing through a taper pipe of length 50 m having diameters 40 cm at the upper end and 20 cm at the lower end, at the rate of 60 litres/s. The pipe has a slope of 1 in 40. Find the pressure at the lower end if the pressure at the higher level is 24.525 N/cm2. [16]
4.a) b)
Derive Bernoulli’s equation for the flow of an incompressible frictionless fluid from consideration of momentum. A 45° reducing bend is connected in a pipe line, the diameters at the inlet and outlet of the bend being 40 cm and 20 cm respectively. Find the force exerted by water on the bend if the intensity of pressure at inlet of bend is 21.58 N/cm2. The rate of flow of water is 500 litres/s. [16] What do you mean by boundary layer separation? What is the effect of pressure gradient on boundary layer separation? How will you find the drag on a flat plate due to laminar and turbulent boundary layers? [16]
nt
5.a)
uW
b)
or ld
2.a) b)
b)
Show that the loss of head due to sudden expansion in pipe line is a function of velocity head. The rate of flow of water through a horizontal pipe is 0.3 m3/s. The diameter of the pipe is suddenly enlarged from 250 mm to 500 mm. The pressure intensity in the smaller pipe is 13.734 N/cm2. Determine: i) loss of head due to sudden enlargement ii) pressure intensity in the large pipe iii) power lost due to enlargement. [16]
Aj
6.a) b)
1
b)
8.a)
What is a pitot-tube? How will you determine the velocity at any point with the help of pitot-tube? A 30 cm × 15 cm venturimeter is inserted in the vertical pipe carrying water, flowing in the upward direction. A differential mercury-manometer connected to the inlet and throat gives a reading of 30 cm. Find the discharge. Take Cd = 0.98. [16]
or ld
b)
Explain the terms : i) Pipes in parallel ii) Equivalent pipe iii) Equivalent size of the pipe. Three pipes of lengths 800 m, 600 m and 300 m and of diameter 400mm, 300 mm and 200 mm respectively are connected in series. The ends of the compound pipe is connected to two tanks, whose water surface levels are maintained at a difference of 15 m. Determine the rate of flow of water through the pipes if f = 0.005. What will be the diameter of a single pipe of length 1700 m and f = 0.005, which replaces the three pipes. [16]
.in
7.a)
Aj
nt
uW
********
2
Code No:RR210106
RR
SET-2
B.Tech II Year - I Semester Examinations, December 2011 FLUID MECHANICS (CIVIL ENGINEERING) Time: 3 hours Max. Marks: 80 Answer any five questions All questions carry equal marks ---
b)
3.a) b)
4.a) b)
Derive Bernoulli’s equation for the flow of an incompressible frictionless fluid from consideration of momentum. A 45° reducing bend is connected in a pipe line, the diameters at the inlet and outlet of the bend being 40 cm and 20 cm respectively. Find the force exerted by water on the bend if the intensity of pressure at inlet of bend is 21.58 N/cm2. The rate of flow of water is 500 litres/s. [16]
What do you mean by boundary layer separation? What is the effect of pressure gradient on boundary layer separation? How will you find the drag on a flat plate due to laminar and turbulent boundary layers? [16] Show that the loss of head due to sudden expansion in pipe line is a function of velocity head. The rate of flow of water through a horizontal pipe is 0.3 m3/s. The diameter of the pipe is suddenly enlarged from 250 mm to 500 mm. The pressure intensity in the smaller pipe is 13.734 N/cm2. Determine: i) loss of head due to sudden enlargement ii) pressure intensity in the large pipe iii) power lost due to enlargement. [16] Explain the terms : i) Pipes in parallel ii) Equivalent pipe iii) Equivalent size of the pipe. Three pipes of lengths 800 m, 600 m and 300 m and of diameter 400mm, 300 mm and 200 mm respectively are connected in series. The ends of the compound pipe is connected to two tanks, whose water surface levels are maintained at a difference of 15 m. Determine the rate of flow of water through the pipes if f = 0.005. What will be the diameter of a single pipe of length 1700 m and f = 0.005, which replaces the three pipes. [16]
nt
5.a)
.in
2.a)
or ld
b)
Define stream line, path line and streak line. Derive mathematical expressions for each of these lines. The water is flowing through a taper pipe of length 50 m having diameters 40 cm at the upper end and 20 cm at the lower end, at the rate of 60 litres/s. The pipe has a slope of 1 in 40. Find the pressure at the lower end if the pressure at the higher level is 24.525 N/cm2. [16]
uW
1.a)
Aj
b)
3
b)
7.a) b)
Discuss the important properties of fluids along with their units and practical significance. Two large plane surface are 25 mm. apart. This space is filled with glycerin of dynamic viscosity 0.804 N- s/m2. Find what force is required to drag a very thin plate of area 0.50 m2 between the two surfaces at a speed of 0.60 m/sec. i) If the plate is equidistant from the two surfaces ii) If the plate is 10 mm from one of the surfaces. [16]
Define velocity gradient, cohesion, compressibility and real fluids. A U-tube differential manometer connects two pressure pipes A and B. Pipe A contains carbon tetrachloride having a specific gravity 1.594 under a pressure of 11.772 N / cm 2 and pipe B contains oil of sp.gr.0.8 under pressure of 11.772 N / cm 2 . The pipe A lies 2.5 m above pipe B. Find the difference of pressure measured by mercury as fluid filling U-tube. [16]
or ld
8.a) b)
What is a pitot-tube? How will you determine the velocity at any point with the help of pitot-tube? A 30 cm × 15 cm venturimeter is inserted in the vertical pipe carrying water, flowing in the upward direction. A differential mercury-manometer connected to the inlet and throat [16] gives a reading of 30 cm. Find the discharge. Take Cd = 0.98.
.in
6.a)
Aj
nt
uW
********
4
Code No:RR210106
RR
SET-3
B.Tech II Year - I Semester Examinations, December 2011 FLUID MECHANICS (CIVIL ENGINEERING) Time: 3 hours Max. Marks: 80 Answer any five questions All questions carry equal marks ---
b)
3.a)
b)
4.a)
Show that the loss of head due to sudden expansion in pipe line is a function of velocity head. The rate of flow of water through a horizontal pipe is 0.3 m3/s. The diameter of the pipe is suddenly enlarged from 250 mm to 500 mm. The pressure intensity in the smaller pipe is 13.734 N/cm2. Determine: i) loss of head due to sudden enlargement ii) pressure intensity in the large pipe iii) power lost due to enlargement. [16]
Explain the terms : i) Pipes in parallel ii) Equivalent pipe iii) Equivalent size of the pipe. Three pipes of lengths 800 m, 600 m and 300 m and of diameter 400mm, 300 mm and 200 mm respectively are connected in series. The ends of the compound pipe is connected to two tanks, whose water surface levels are maintained at a difference of 15 m. Determine the rate of flow of water through the pipes if f = 0.005. What will be the diameter of a single pipe of length 1700 m and f = 0.005, which replaces the three pipes. [16] What is a pitot-tube? How will you determine the velocity at any point with the help of pitot-tube? A 30 cm × 15 cm venturimeter is inserted in the vertical pipe carrying water, flowing in the upward direction. A differential mercury-manometer connected to the inlet and throat [16] gives a reading of 30 cm. Find the discharge. Take Cd = 0.98.
nt
b)
.in
2.a)
or ld
b)
What do you mean by boundary layer separation? What is the effect of pressure gradient on boundary layer separation? How will you find the drag on a flat plate due to laminar and turbulent boundary layers? [16]
uW
1.a)
5.a)
Aj
b)
Discuss the important properties of fluids along with their units and practical significance. Two large plane surface are 25 mm. apart. This space is filled with glycerin of dynamic viscosity 0.804 N- s/m2. Find what force is required to drag a very thin plate of area 0.50 m2 between the two surfaces at a speed of 0.60 m/sec. i) If the plate is equidistant from the two surfaces ii) If the plate is 10 mm from one of the surfaces. [16]
5
Define velocity gradient, cohesion, compressibility and real fluids. A U-tube differential manometer connects two pressure pipes A and B. Pipe A contains carbon tetrachloride having a specific gravity 1.594 under a pressure of 11.772 N / cm 2 and pipe B contains oil of sp.gr.0.8 under pressure of 11.772 N / cm 2 . The pipe A lies 2.5 m above pipe B. Find the difference of pressure measured by mercury as fluid filling U-tube. [16]
7.a)
Define stream line, path line and streak line. Derive mathematical expressions for each of these lines. The water is flowing through a taper pipe of length 50 m having diameters 40 cm at the upper end and 20 cm at the lower end, at the rate of 60 litres/s. The pipe has a slope of 1 in 40. Find the pressure at the lower end if the pressure at the higher level is 24.525 N/cm2. [16]
b)
8.a)
Derive Bernoulli’s equation for the flow of an incompressible frictionless fluid from consideration of momentum. A 45° reducing bend is connected in a pipe line, the diameters at the inlet and outlet of the bend being 40 cm and 20 cm respectively. Find the force exerted by water on the bend if the intensity of pressure at inlet of bend is 21.58 N/cm2. The rate of flow of water is 500 litres/s. [16]
or ld
b)
.in
6.a) b)
Aj
nt
uW
********
6
Code No:RR210106
2.a) b)
3.a) b)
.in
What is a pitot-tube? How will you determine the velocity at any point with the help of pitot-tube? A 30 cm × 15 cm venturimeter is inserted in the vertical pipe carrying water, flowing in the upward direction. A differential mercury-manometer connected to the inlet and throat [16] gives a reading of 30 cm. Find the discharge. Take Cd = 0.98. Discuss the important properties of fluids along with their units and practical significance. Two large plane surface are 25 mm. apart. This space is filled with glycerin of dynamic viscosity 0.804 N- s/m2. Find what force is required to drag a very thin plate of area 0.50 m2 between the two surfaces at a speed of 0.60 m/sec. i) If the plate is equidistant from the two surfaces ii) If the plate is 10 mm from one of the surfaces. [16] Define velocity gradient, cohesion, compressibility and real fluids. A U-tube differential manometer connects two pressure pipes A and B. Pipe A contains carbon tetrachloride having a specific gravity 1.594 under a pressure of 11.772 N / cm 2 and pipe B contains oil of sp.gr.0.8 under pressure of 11.772 N / cm 2 . The pipe A lies 2.5 m above pipe B. Find the difference of pressure measured by mercury as fluid filling U-tube. [16]
nt
4.a) b)
B.Tech II Year - I Semester Examinations, December 2011 FLUID MECHANICS (CIVIL ENGINEERING) Time: 3 hours Max. Marks: 80 Answer any five questions All questions carry equal marks --Explain the terms : i) Pipes in parallel ii) Equivalent pipe iii) Equivalent size of the pipe. Three pipes of lengths 800 m, 600 m and 300 m and of diameter 400mm, 300 mm and 200 mm respectively are connected in series. The ends of the compound pipe is connected to two tanks, whose water surface levels are maintained at a difference of 15 m. Determine the rate of flow of water through the pipes if f = 0.005. What will be the diameter of a single pipe of length 1700 m and f = 0.005, which replaces the three pipes. [16]
or ld
b)
5.a)
Define stream line, path line and streak line. Derive mathematical expressions for each of these lines. The water is flowing through a taper pipe of length 50 m having diameters 40 cm at the upper end and 20 cm at the lower end, at the rate of 60 litres/s. The pipe has a slope of 1 in 40. Find the pressure at the lower end if the pressure at the higher level is 24.525 N/cm2. [16]
Aj
b)
SET-4
uW
1.a)
RR
7
b)
7.a) b)
8.a)
What do you mean by boundary layer separation? What is the effect of pressure gradient on boundary layer separation? How will you find the drag on a flat plate due to laminar and turbulent boundary layers? [16] Show that the loss of head due to sudden expansion in pipe line is a function of velocity head. The rate of flow of water through a horizontal pipe is 0.3 m3/s. The diameter of the pipe is suddenly enlarged from 250 mm to 500 mm. The pressure intensity in the smaller pipe is 13.734 N/cm2. Determine: i) loss of head due to sudden enlargement ii) pressure intensity in the large pipe iii) power lost due to enlargement. [16]
or ld
b)
Derive Bernoulli’s equation for the flow of an incompressible frictionless fluid from consideration of momentum. A 45° reducing bend is connected in a pipe line, the diameters at the inlet and outlet of the bend being 40 cm and 20 cm respectively. Find the force exerted by water on the bend if the intensity of pressure at inlet of bend is 21.58 N/cm2. The rate of flow of water is 500 litres/s. [16]
.in
6.a)
Aj
nt
uW
********
8
