1. A cylindrical water tank has a 2 m height and 2 m diameter. The water is filled up in the tank. The total weight of the water is (in kg). if the density of water is 1000 kg/m3.
a. 6283.18
b. 3141.59
c. 1570.80
d. 2000
2. In the tank given in question 1, a small orifice is constructed to release the water. The orifice has a diameter of 2cm. Neglecting minor entry loss, the velocity of the flow (m/s) in the orifice is_______
a. 3.132
b. 6.264
c. 9.396
d. 12.528
3. As given in question 1 and question 2, the discharge in the orifice is ______ (in m3/s)
a. 0.19
b. 0.019
c. 0.0019
d. 1.9
4. The water tank mentioned in question1 is placed on 6m height building. A pipe is fitted with the orifice of the tank to the ground. What is velocity of the flow in the pipe at the ground level (m/s).
a. 3.132
b. 6.264
c. 9.396
d. 12.528
5. A river flows with a velocity of 3m/s. A boat of maximum velocity 5m/s needs to travel in the river upstream direction. The travel distance is 100km. the travel time of the boat is_______ (hours)
a. 833.33
b. 13.89
c. 3.472
d. None
6. The boat given in question-5 travels downstream in a distance of 100km. The travel time in hours is
a. 3.472
b. 3.968
c. 5.567
d. 9.259
7. The cross section of the river is approximated as given in the figure: Estimate the discharge (flow rate in m3/s) of the river flowing with a velocity 2m/s.
a. 5000
b. 22500
c. 2812.5
d. 5625
8. Reynolds number for a pipe of diameter ‘D’ is defined as
a. 𝝆VD/ μ
b. νD/𝝆
c. V2D/ g
d. ν3D/𝝆g
9. Atmospheric pressure is measured in terms of
a. Dyne/cm2
b. N/m2
c. bar
d. atm
e. all of the above
f. none of the above
10. As given in below figure what would be pressure at point A in kg/m2
a. 0
b. 7800
c. 5100
d. 2700
11. Newton’s law of viscosity relates
a. Pressure, velocity and viscosity
b. Shear stress and rate of angular deformation in a fluid
c. Shear stress, temperature, velocity and viscosity
d. None of the above
12. A control volume implies
a. An isolated system
b. A fixed region in space
c. A closed system
d. A specified mass in fluid flow
13. Match List 1 and List 2 and select the correct answer using the codes given below
List 1 List 2
P. Property which explains the spherical nature of a drop of a fluid 1. Viscosity
Q. Property which explains cavitation in fluid flow 2. Surface tension
R. Property which explains rise of water in trees 3. Compressibility
S. Property which explains flow of oil jet 4. Vapor pressure 5.Capillarity
a. P-3, Q-4, R-5, S-1
b. P-1, Q-2, R-3, S-4
c. P-2, Q-4, R-5, S-1
d. P-1; Q-2; R-4, S-5
14. The unit of kinematic viscosity of a fluid is
a. m2/s
b. N-s/m2
c. Pa-s/ m2
d. Kg-s2/ m2
15. With increase of temperature, viscosity of a gas
a. Does not change
b. Always increase
c. Always decrease
d. Cannot say
16. Which of the following statements are applicable for the concept of continuum fluid mechanics is
a. Assumes a continuous distribution of mass with in the matter or system with no empty space.
b. Properties of the system can be expressed as continuous functions of space and time
c. The mean free path of the molecule is much smaller compared to the characteristic dimension
d. All of the above
17. Shear stress in the Newtonian fluid is proportional to
a. Pressure
b. Strain
c. Strain rate
d. The inverse of viscosity
18. The phenomenon of surface tension arises due to intermolecular forces of
a. Only cohesion
b. Only adhesion
c. Both cohesion and adhesion
d. Cannot say
19. The locus of temporary locations of all the particles that have passed through a through a fixed point in the flow field is
a. Stream line
b. Streak line
c. Path line
d. None of the above
20. The flow in which velocity of a fluid at a particular fixed point change with time
a. Unsteady flow
b. Laminar flow
c. Steady flow
d. Smooth layered flow
21. A fluid is one which can be defined as a substance
a. Has same shear stress at all points
b. Can deform indefinitely under the action of the smallest shear force
c. Has the small shear stress in all directions
d. Is practically incompressible
22. Kinematic viscosity is defined as
a. Dynamic viscosity x density
b. Dynamic viscosity/density
c. Dynamic viscosity x pressure
d. Pressure x density
23. Poise is the unit of
a. Mass density
b. Kinematic viscosity
c. Viscosity
d. Velocity gradient
24. The lines A and B in the following graph represent :
a. Bingham plastic and Newtonian fluid
b. Pseudo plastic and Non-Newtonian dilatant
c. Pseudo plastic and Newtonian fluid
d. Cannot say
25. The velocity distribution for flow over a flat plate is given by u = 0.75y- y2 in which u is the velocity in m/s at a distance of y m above the plate. Determine the shear stress in N/m2 at y =0.15 m. Take dynamic viscosity of fluid as 8.5 poise.
26. The kinematic viscosity and specific gravity of a certain liquid are 5.58 x 10-4 m2/s and 2 respectively. Compute dynamic viscosity in Ns/m2.
Based on the below statement answer the question number 27 and 28
If 5 m3 of a certain liquid weighs 40 kN, calculate the mass density (kg/m3) and specific gravity of the liquid. Consider g as 9.81m/s2.
27. calculate the mass density (kg/m3) of the liquid
28. calculate the specific gravity of the liquid
29.for a fluid in motion, pressure at a point is same in all directions, then the fluid is
a. A real fluid
b. A Newtonian fluid
c. AnIdealfluid
d. A non-Newtonian fluid
30 .Shear stress develops on a fluid element, if
the fluid
a. Is at rest
b. If the container is subjected to uniform linear acceleration
c. Is inviscid
d. Is viscous and the flow is
non-uniform
31. A floating body with its center of gravity
at G, center of buoyancy at B and metacenter at M is stable when
a. BM>BG
b. BM=BG
c. BM<BG
d. Cannot say
32.Select the correct statement
a. Absolute pressure = Gauge pressure – Atmospheric pressure
b. Gauge pressure=
Absolute pressure – Atmospheric pressure
c. Absolute pressure =
Atmospheric pressure + Vacuum pressure
d. Gauge pressure = Atmospheric
pressure + Vacuum pressure
33. Atmospheric pressure held in terms of water
column is
a. 7.5 m
b. 8.5 m
c. 9.81 m
d. 10.3 m
34. When a liquid is in contact with a solid,
if the forces of adhesion between the molecules of the liquid and solid are
greater than cohesive forces among liquid molecules, the phenomenon occurs is
a. Capillary depression
b. Capillary rise
c. No change in liquid surface
d. Cannot say
35. Center of pressure of a plane surface
immersed in a liquid is
a. Above the center of gravity of the plane surface
b. At the center of gravity of the plane surface
c. Below the center of gravity of the plane surface
d. None of the above
36. The manometer suitable for measurement of
small pressure difference in Liquids is
a. Inverted U-tube manometer
b. Ordinary U tube manometer
c.Inclinedmanometer
d. None of the above
37. For liquids, will capillarity height
increase or decrease with the rise in temperature
a. Increase
b. Decrease
c. First decrease then increase
d. Remain constant
38. If a small concrete cube is submerged deep
in still water in such a way that the pressure exerted on all faces of the cube
is p, then the maximum shear stress developed inside the cube is
a.Zero
b. p/2
c. p
d. 2p
39. If the density of the flow-sediment
suspension varies with depth from free surface h as ρ= 1024+h,
calculate the pressure at the depth of 2 m (in kPa). Consider g =
9.81 m/s2
40. The pressure intensity at a point in a
fluid is given by 3.924 N/cm2. Find the corresponding height of fluid (in m)
when the fluid is in oil of specific gravity 0.9
41. The right limb of a simple U-tube manometer containing
mercury is open to the atmosphere while the left limb is connected to a pipe in
which fluid of specific gravity 0.9 is flowing. The sketch below shows the
details of levels of fluid and mercury.
Find the pressure of a fluid in the pipe in N/cm2. Neglect atmospheric pressure.
Based on the below statement answer the question number 42 and 43
42. A circular plate of diameter 1.5 m which
is placed vertically in such a way that the center of the plate is 3 m below
the free surface of water.
43.
Determine the total pressure (in N)
44. Which
one is in a state of failure?
a)
Solid
b) Liquid
c)
Gas
d)
Fluid
45. A
small shear force is applied on an element and then removed. If the element
regains it’s original position, what kind of an element can it be?
a)
Solid
b)
Liquid
c)
Fluid
d)
Gaseous
46. In
which type of matter, one won’t find a free surface?
a)
Solid
b)
Liquid
c)
Gas
d)
Fluid
47. If a
person studies about a fluid which is at rest, what will you call his domain of
study?
a)
Fluid Mechanics
b)
Fluid Statics
c)
Fluid Kinematics
d)
Fluid Dynamics
48. The
value of the compressibility of an ideal fluid is
a)
zero
b)
unity
c)
infinity
d)
more than that of a real fluid
49. The
value of the Bulk Modulus of an ideal fluid is
a)
zero
b)
unity
c)
infinity
d)
less than that of a real fluid
50. The
value of the viscosity of an ideal fluid is
a)
zero
b)
unity
c)
infinity
d)
more than that of a real fluid
51. The
value of the surface tension of an ideal fluid is
a)
zero
b)
unity
c)
infinity
d)
more than that of a real fluid.
52.
Which one of the following is the unit of mass density?
a)
kg = m3
b)
kg = m2
c)
kg = m
d)
kg = ms
53. The
specific gravity of a liquid has
a)
the same unit as that of mass density
b)
the same unit as that of weight density
c)
the same unit as that of specific volume
d)
no unit
54. The
specific volume of a liquid is the reciprocal of
a)
weight density
b)
mass density
c)
specific weight
d)
specific volume
55.
Which one of the following is the unit of specific weight?
a)
N = m3
b)
N = m2
c)
N = m
d)
N = ms
56.
Which one of the following is the unit of specific weight?
a)
N = m3
b)
N = m2
c)
N = m
d)
N = ms
57.
Which one of the following is the dimension of specific gravity of a liquid?
a)
[M1 L -3 T 0 ].
b)
[M1 L 0 T 0 ].
c)
[M0 L -3 T 0 ].
d)
[M0 L 0 T 0 ].
58.
Which one of the following is the dimension of specific volume of a liquid?
a)
[M1 L -3 T 0 ].
b)
[M-1 L 3 T 0 ].
c)
[M-1 L -3 T 0 ].
d)
[M0 L 3 T 0 ].
59.
Which one of the following is the dimension of specific weight of a liquid?
a)
[ML-3 T -2 ].
b)
[ML3 T -2 ].
c)
[ML-2 T -2 ].
60. Two
fluids 1 and 2 have mass densities of p1 and p2 respectively. If p1 > p2,
which one of the following expressions will represent the relation between
their specific volumes v1 and v2?
a)
v1 > v2
b)
v1 < v2
c)
v1 = v2
d)
Cannot be determined due to insufficient information.
61. A
beaker is filled with a liquid up to the mark of one litre and weighed. The
weight of the liquid is found to be 6.5 N. The specific weight of the liquid
will be
a)
6:5 kN = m3
b)
6:6 kN = m3
c)
6:7 kN = m3
d)
6:8 kN = m3
62. A
beaker is filled with a liquid up to the mark of one litre and weighed. The
weight of the liquid is found to be 6.5 N. The specific gravity of the liquid
will be
a)
0.65
b)
0.66
c)
0.67
d)
0.68
63. A
beaker is filled with a liquid up to the mark of one litre and weighed. The
weight of the liquid is found to be 6.5 N. The specific volume of the liquid
will be
a)
1 l =kg
b)
1:5 l =kg
c)
2 l =kg
d)
2:5 l =kg
64.
Calculate the specific weight and weight of 20dm3 of petrol of specific gravity
0.6.
a)
5886,117.2
b)
5886,234.2
c)
11772,117.2
d)
None of the mentioned
65. If
200m3 of fluid has a weight of 1060N measured on the planet having acceleration
due to gravity 6.625m/s2, what will be it’s specific volume?
a)
0.8
b)
0.7
c)
0.9
d)
0.5
66. For
an incompressible fluid does density vary with temperature and pressure?
a)
It varies for all temperature and pressure range
b)
It remains constant
c)
It varies only for lower values of temperature and pressure
d)
It varies only for higher values of temperature and pressure
67.
Specific gravity is what kind of property?
a)
Intensive
b)
Extensive
c)
None of the mentioned
d)
It depends on external conditions
68. If
there is bucket full of oil and bucket full of water and you are asked to lift
them, which one of the two will require more effort given that volume of
buckets remains same?
a)
Oil bucket
b)
Water bucket
c)
Equal effort will be required to lift both of them
d)
None of the mentioned
69. If
the fluid has specific weight of 10N/m3 for a volume of 100dm3 on a planet
which is having acceleration due to gravity 20m/s2 , what will be its specific
weight on a planet having acceleration due to gravity 4m/s2?
a)
5 N/m3
b)
50 N/m3
c)
2 N/m3
d)
10 N/m3
70.
Should Specific Wieght of incompressible fluid only be taken at STP?
a)
Yes, as specific weight may show large variation with temperature and pressure
b)
No, it can be taken for any temperature and pressure
c)
It should be taken at standard temperature but pressure may be any value
d)
It should be taken at standard pressure but temperature may be any value
71. An
instrument with air as fluid was involved in some experiment( specific volume
was the characteristic property utilized) which was conducted during day in
desert. Due to some reason experiment couldn’t be conducted during day and had
to be conducted during night. However there were considerable errors in
obtained values. What might be the reason of these errors?
a)
It was human error
b)
It was instrumental error
c)
Error was due to the fact that experiment was conducted at night
d)
None of the mentioned
72. A
stone weighed 177 N on earth. It was dropped in to oil of specific gravity 0.8
on a planet whose acceleration due to gravity is 5m/s2. It displaced oil having
weight of 100N. What was the volume of oil displaced by the stone?
a)
25 Litres
b)
15 Litres
c)
25 m3
d)
None of the mentioned
73. An
compressible fluid’s specific gravity was measured on earth, on a planet having
acceleration due to gravity 5.5 times that of earth, and in space at STP. Where
will it be having highest value?
a)
on the earth
b)
on the planet
c)
in the space
d)
it will be constant everywhere
74.
Water flows between two plates of which the upper one is stationary and the
lower one is moving with a velocity V. What will be the velocity of the fluid
in contact with the upper plate?
a)
V
b)
N ⁄ 2
c)
2V
d)
0
75. The
viscous force the relative motion between the adjacent layers of a fluid in
motion. Which one of the flowing fits best in the sentence?
a)
opposes
b)
never affects
c)
facilitates
d)
may effect under certain conditions
76. The
viscosity of a fluid in motion is 1 Poise. What will be it’s viscosity (in
Poise) when the fluid is at rest?
a)
0
b)
0.5
c)
1
d)
2
77.
Which of the following correctly states how the viscosities of a liquid and a
gas will change with temperature?
a)
Viscosity increases with the increase in temperature of a liquid and decreases
with the increase in temperature of a gas
b)
Viscosity increases with the increase in temperature of a liquid and increases
with the increase in temperature of a gas
c)
Viscosity decreases with the increase in temperature of a liquid and decreases
with the increase in temperature of a gas
d)
Viscosity decreases with the increase in temperature of a liquid and increases
with the increase in temperature of a gas
78.
Which one of the following is not a unit of dynamic viscosity?
a)
Pa-s
b)
N-s/m2
c)
Poise
d)
Stokes
79.
Which of the following is a unit of dynamic viscosity?
a) [M1 L 1 T -1 ].
b)
[M1 L -1 T -1 ].
c)
[M1 L -2 T -2 ].
d)
[M1 L -2 T -2 ].
80.
Which one of the following is the CGS unit of dynamic viscosity?
a)
Stokes
b)
Pa-s
c)
m2 /s
d)
Poise
81. The
dynamic viscosity of a fluid is 1 Poise. What should one multiply to it to get
the answer in N-s/m2 ?
a)
0.1
b)
1
c)
10
d)
100
82.
Which of the following is a unit of kinematic viscosity?
a)
Stokes
b)
Pa-s
c)
m2=s
d)
Poise
83.
Which of the following is the dimension of kinematic viscosity?
a) [L1 T -1 ].
b)
[L1 T -2 ].
c)
[L2 T -1 ].
d)
[L2 T -2 ].
84. The
kinematic viscosity of a fluid is 0.1 Stokes. What will be the value is m2 /s?
a)
10-2
b)
10-3
c)
10-4
d)
10-5
85. The
shear stress at a point in a liquid is found to be 0.03 N/m2 . The velocity
gradient at the point is 0.15 s-1 . What will be it’s viscosity (in Poise)?
a)
20
b) 2
c)
0.2
d)
0.5
86. The
space between two plates (20cm*20cm*1cm), 1 cm apart, is filled with a liquid
of viscosity 1 Poise. The upper plate is dragged to the right with a force of
5N keeping the lower plate stationary. What will be the velocity in m/s of flow
at a point 0.5 cm below the lower surface of the upper plate if linear velocity
profile is assumed for the flow?
a)
1.25
b)
2.5
c)
12.5
d)
0.25
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