FLUID MECHANICS
An electron will not be ejected
If the energy of the incident photon is less than the work function:
Increases
For supersonic flow, the pressure of fluid must decrease as the fluid flow area of the duct.
Dynamic viscosity / kinematic viscosity
Density in term of viscosity is:
Shape
Liquids and gases take the following characteristic(s) of their contents.
C. A and B above are correct
Alcohol finds use in manometers as:
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
,D. Shear stress is proportional to rate of strain
Which of the following statements about a Newtonian 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 to rate of strain
When there is no motion of one fluid layer relative to an adjacent layer
The normal stress is the same in all directions at a point in fluid:
C. It is a shear stress
Which of the following is not a characteristic of fluid pressure?
A. It is the same in all directions at a point in the fluid
B. Its acts normal to a surface
C. It is a shear stress
D. It is linear with depth
First slowly and then steeply
The length of mercury column at a place at an altitude will change with respect to that at
ground in:
D. Biot number
All of the following dimensionless parameters are applicable to fluid flow problems except the
_______.
A. Reynolds number
B. Froude number
C. Mach number
D. Biot number
D. all of the above
Mass density of liquid (ρ) is given by which of the following?
A. Ρ = Mass / volume
, B. Ρ = metric slug / 𝑚2
C. Ρ = kg 𝑠𝑒𝑐2 / 𝑚4
D. all of the above
D. Thermal conductivity
the speed of sound in all fluid is most closely related to all of the following properties
except________.
A. Compressibility
B. Density
C. Bulk module
D. Thermal conductivity
D. All of the above
Under which condition, the specific weight of water is 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
D. hysteresis
All of the following can be characteristics of fluids except_________.
A. kinematic viscosity
B. surface tension
C. bulk modulus
D. hysteresis
D. Pilot tube
Which of the following can be used to measure the flow of water in a pipe of diameter 3000
mm?
A. Venturimeter
B. Rotameter
An electron will not be ejected
If the energy of the incident photon is less than the work function:
Increases
For supersonic flow, the pressure of fluid must decrease as the fluid flow area of the duct.
Dynamic viscosity / kinematic viscosity
Density in term of viscosity is:
Shape
Liquids and gases take the following characteristic(s) of their contents.
C. A and B above are correct
Alcohol finds use in manometers as:
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
,D. Shear stress is proportional to rate of strain
Which of the following statements about a Newtonian 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 to rate of strain
When there is no motion of one fluid layer relative to an adjacent layer
The normal stress is the same in all directions at a point in fluid:
C. It is a shear stress
Which of the following is not a characteristic of fluid pressure?
A. It is the same in all directions at a point in the fluid
B. Its acts normal to a surface
C. It is a shear stress
D. It is linear with depth
First slowly and then steeply
The length of mercury column at a place at an altitude will change with respect to that at
ground in:
D. Biot number
All of the following dimensionless parameters are applicable to fluid flow problems except the
_______.
A. Reynolds number
B. Froude number
C. Mach number
D. Biot number
D. all of the above
Mass density of liquid (ρ) is given by which of the following?
A. Ρ = Mass / volume
, B. Ρ = metric slug / 𝑚2
C. Ρ = kg 𝑠𝑒𝑐2 / 𝑚4
D. all of the above
D. Thermal conductivity
the speed of sound in all fluid is most closely related to all of the following properties
except________.
A. Compressibility
B. Density
C. Bulk module
D. Thermal conductivity
D. All of the above
Under which condition, the specific weight of water is 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
D. hysteresis
All of the following can be characteristics of fluids except_________.
A. kinematic viscosity
B. surface tension
C. bulk modulus
D. hysteresis
D. Pilot tube
Which of the following can be used to measure the flow of water in a pipe of diameter 3000
mm?
A. Venturimeter
B. Rotameter
