CHAPTER 11 FLUID MECHANICS
1. If the energy of the incident photons is less than the C. An electron will not be ejected
work function:
A. An electron will be ejected
B. More than one electron will be ejected
C. An electron will not be ejected
D. Less than one electron will be ejected
2. For supersonic, the pressure of fluid must decrease as A. Increases
the fluid flow area of the duct:
A. Increases
B. Decreases
C. Remain the same
D. None of these
3. Density in terms of viscosity is: B. Dynamic viscosity / kinematic viscosity
A. Kinematic viscosity / dynamic viscosity
B. Dynamic viscosity / kinematic viscosity
C. Kinematic viscosity x dynamic viscosity
D. None of the above
4. Liquids and gases take the following characteristics (s) B. Shape
of their contents:
A. Volume
B. Shape
C. Shape and volume
D. Neither shape nor volume
5. Alcohol finds in manometers as: C. A and B above are correct
A. It provides a suitable meniscus for the inclined tube
B. Its density being less can provide longer length for a
pressure difference, thus more accuracy can be obtained
C. A and B above are correct
D. Cheap and easily available
6. Which of the following statement about a Newtonian D. Shear stress is proportional rate of strain
fluid is most accurate?
A. Shear stress is proportional to strain
B. Viscosity is zero
C. Shear stress is multi - valued
D. Shear stress is proportional rate of strain
7. The normal stress is the same in all directions at a point B. When there is no motion of one fluid layer relative to an adjacent layer
in fluid:
A. Independent of the motion of one fluid layer relative to
an adjacent layer
B. When there is no motion of one fluid layer relative to an
adjacent layer
C. Only if the fluid is frictionless
D. Only if fluid is frictionless and incompressible
8. Which of the following is not a characteristic of C. It is a shear stress
pressure?
A. It is the same in all direction at a point in the fluid
B. It acts normal to a surface
C. It is a shear stress
D. It is linear with depth
9. The length of mercury column at a place at an altitude D. First slowly and then steeply
will change with respect to that at ground in:
A. A linear relation
B. A parabolic relation
C. Will remain constant
D. First slowly and then steeply
, CHAPTER 11 FLUID MECHANICS
10. All of the following dimensionless parameters are D. Blot number
applicable to the flow fluid problems except the ________.
A. Reynolds number
B. Froude number
C. Mach number
D. Blot number
11. Mass density of liquid (p) is given by which of the D. All of the above
following?
A. P = mass / volume
B. P = metric slug / m2
C. P = kg sec2 / m4
D. All of the above
12. The speed of sound in all fluids is most closely related D. Thermal conductivity
to all of the following properties except _________.
A. Compressibility
B. Density
C. Bulk modulus
D. Thermal conductivity
13. Under which condition, the specific weight of water is D. All of the above
1000 kg/m3?
A. At normal pressure of 760 mm
B. At 4°C temperature
C. At mean sea level
D. All of the above
14. All of the following can be characteristics of fluids D. Hysteresis
except __________.
A. Kinetic viscosity
B. Surface tension
C. Bulk modulus
D. Hysteresis
15. Which of the following can be used to measure the flow D. Pitot tube
of water in a pipe of diameter 3000mm?
A. Venturimeter
B. Rotameter
C. Nozzle
D. Pitot tube
16. The pressure at a given depth due to several B. The sum of the individual pressure
immiscible liquids is:
A. The average of the individual pressures
B. The sum of the individual pressure
C. Independ of the individual pressures
D. Unknown
17. The equation of continuity of flow is applicable if: D. All of the above conditions are together
A. The flow is one dimensional
B. The flow is steady
C. The velocity is uniform over the cross - section
D. All of the above conditions are together
18. Uniform flow takes place when: C. At every point the velocity vector is identical in magnitude and direction for any
A. Condition remain unchanged with time at any point given instant
B. Rate of change of velocity of fluid is zero
C. At every point the velocity vector is identical in
magnitude and direction for any given instant
D. The change in transverse direction is zero
1. If the energy of the incident photons is less than the C. An electron will not be ejected
work function:
A. An electron will be ejected
B. More than one electron will be ejected
C. An electron will not be ejected
D. Less than one electron will be ejected
2. For supersonic, the pressure of fluid must decrease as A. Increases
the fluid flow area of the duct:
A. Increases
B. Decreases
C. Remain the same
D. None of these
3. Density in terms of viscosity is: B. Dynamic viscosity / kinematic viscosity
A. Kinematic viscosity / dynamic viscosity
B. Dynamic viscosity / kinematic viscosity
C. Kinematic viscosity x dynamic viscosity
D. None of the above
4. Liquids and gases take the following characteristics (s) B. Shape
of their contents:
A. Volume
B. Shape
C. Shape and volume
D. Neither shape nor volume
5. Alcohol finds in manometers as: C. A and B above are correct
A. It provides a suitable meniscus for the inclined tube
B. Its density being less can provide longer length for a
pressure difference, thus more accuracy can be obtained
C. A and B above are correct
D. Cheap and easily available
6. Which of the following statement about a Newtonian D. Shear stress is proportional rate of strain
fluid is most accurate?
A. Shear stress is proportional to strain
B. Viscosity is zero
C. Shear stress is multi - valued
D. Shear stress is proportional rate of strain
7. The normal stress is the same in all directions at a point B. When there is no motion of one fluid layer relative to an adjacent layer
in fluid:
A. Independent of the motion of one fluid layer relative to
an adjacent layer
B. When there is no motion of one fluid layer relative to an
adjacent layer
C. Only if the fluid is frictionless
D. Only if fluid is frictionless and incompressible
8. Which of the following is not a characteristic of C. It is a shear stress
pressure?
A. It is the same in all direction at a point in the fluid
B. It acts normal to a surface
C. It is a shear stress
D. It is linear with depth
9. The length of mercury column at a place at an altitude D. First slowly and then steeply
will change with respect to that at ground in:
A. A linear relation
B. A parabolic relation
C. Will remain constant
D. First slowly and then steeply
, CHAPTER 11 FLUID MECHANICS
10. All of the following dimensionless parameters are D. Blot number
applicable to the flow fluid problems except the ________.
A. Reynolds number
B. Froude number
C. Mach number
D. Blot number
11. Mass density of liquid (p) is given by which of the D. All of the above
following?
A. P = mass / volume
B. P = metric slug / m2
C. P = kg sec2 / m4
D. All of the above
12. The speed of sound in all fluids is most closely related D. Thermal conductivity
to all of the following properties except _________.
A. Compressibility
B. Density
C. Bulk modulus
D. Thermal conductivity
13. Under which condition, the specific weight of water is D. All of the above
1000 kg/m3?
A. At normal pressure of 760 mm
B. At 4°C temperature
C. At mean sea level
D. All of the above
14. All of the following can be characteristics of fluids D. Hysteresis
except __________.
A. Kinetic viscosity
B. Surface tension
C. Bulk modulus
D. Hysteresis
15. Which of the following can be used to measure the flow D. Pitot tube
of water in a pipe of diameter 3000mm?
A. Venturimeter
B. Rotameter
C. Nozzle
D. Pitot tube
16. The pressure at a given depth due to several B. The sum of the individual pressure
immiscible liquids is:
A. The average of the individual pressures
B. The sum of the individual pressure
C. Independ of the individual pressures
D. Unknown
17. The equation of continuity of flow is applicable if: D. All of the above conditions are together
A. The flow is one dimensional
B. The flow is steady
C. The velocity is uniform over the cross - section
D. All of the above conditions are together
18. Uniform flow takes place when: C. At every point the velocity vector is identical in magnitude and direction for any
A. Condition remain unchanged with time at any point given instant
B. Rate of change of velocity of fluid is zero
C. At every point the velocity vector is identical in
magnitude and direction for any given instant
D. The change in transverse direction is zero
