FLUID MECHANICS FINAL EXAM REVIEW
The surface force acting on a differential surface element shown in the figure is the
___________ product of a stress tensor and the unit outward normal vector. - Answers-
contracted
__________ equation is an approximate relation between pressure, velocity, and
elevation, and is valid in regions of steady, incompressible flow where net frictional
forces are negligible.
Newton's
Navier-Stokes
Andrade's
The Bernoulli - Answers- The Bernoulli
For steady and single-stream flow, where 1 and 2 denote the inlet and the outlet,
respectively. Select the correct equations reflecting the mass balance. (Check all that
apply)
m1 = constant
p1*V1*A1 = p2*V2*A2
p1*V1*A1 = 0
m1 = m2 - Answers- m1 = m2, p1*V1*A1 = p2*V2*A2,
In fluid mechanics, Newton's second law is usually referred to as the _______ equation.
conservation of energy
linear momentum
Bernoulli
angular momentum - Answers- Linear momentum
Two pumps with an output mass flow rate of 10kg/s each are to be used to keep the
core full.
Two pumps with output mass flow rate of 5kg/s each are to be to keep the core full
A pump with an output mass flow rate of 10kg/s is to be used to keep the core full.
A pump with an output mass flow rate of 20kg/s is to be used to keep the core full. -
Answers- Two pumps with an output mass flow rate of 10kg/s each are to be used to
keep the core full.
A pump with an output mass flow rate of 20kg/s is to be used to keep the core full.
The important distinguishing feature of a moving or deformed control volume is that the
concept of relative _______ is to be involved.
, current
volume
velocity
density - Answers- velocity
During a steady-flow process, choose correct statements regarding the mass balance
principle.
The total amount of mass contained within a control volume does not change with time.
The flow velocity within a control volume is the same
The total rate of mass entering a control volume is equal to the total rate of mass
leaving it
The total rate of mass entering a control volume is a constant - Answers- The total rate
of mass entering a control volume is equal to the total rate of mass leaving it
The total rate of mass entering a control volume is a constant
The total amount of mass contained within a control volume does not change with time.
The conservation relations are also called __________ equations since any conserved
quantity must balance during a process. - Answers- balance
The conservation of energy principle requires that the change in the energy content of a
system be ________ the net energy transfer to or from the system during a process.
less than
more than
independent of
equal to - Answers- equal to
In a water-cooled nuclear reactor, the reactor core must be always filled with water. if
the reactor converts 20 kg of water to steam every second, select the acceptable
scenarios from the following.
The velocity of the fluid flowing in a pipe is maximum at or near the ____________ of
the pipe.
centerline
entrance
exit
wall - Answers- centerline
The surface force acting on a differential surface element shown in the figure is the
___________ product of a stress tensor and the unit outward normal vector. - Answers-
contracted
__________ equation is an approximate relation between pressure, velocity, and
elevation, and is valid in regions of steady, incompressible flow where net frictional
forces are negligible.
Newton's
Navier-Stokes
Andrade's
The Bernoulli - Answers- The Bernoulli
For steady and single-stream flow, where 1 and 2 denote the inlet and the outlet,
respectively. Select the correct equations reflecting the mass balance. (Check all that
apply)
m1 = constant
p1*V1*A1 = p2*V2*A2
p1*V1*A1 = 0
m1 = m2 - Answers- m1 = m2, p1*V1*A1 = p2*V2*A2,
In fluid mechanics, Newton's second law is usually referred to as the _______ equation.
conservation of energy
linear momentum
Bernoulli
angular momentum - Answers- Linear momentum
Two pumps with an output mass flow rate of 10kg/s each are to be used to keep the
core full.
Two pumps with output mass flow rate of 5kg/s each are to be to keep the core full
A pump with an output mass flow rate of 10kg/s is to be used to keep the core full.
A pump with an output mass flow rate of 20kg/s is to be used to keep the core full. -
Answers- Two pumps with an output mass flow rate of 10kg/s each are to be used to
keep the core full.
A pump with an output mass flow rate of 20kg/s is to be used to keep the core full.
The important distinguishing feature of a moving or deformed control volume is that the
concept of relative _______ is to be involved.
, current
volume
velocity
density - Answers- velocity
During a steady-flow process, choose correct statements regarding the mass balance
principle.
The total amount of mass contained within a control volume does not change with time.
The flow velocity within a control volume is the same
The total rate of mass entering a control volume is equal to the total rate of mass
leaving it
The total rate of mass entering a control volume is a constant - Answers- The total rate
of mass entering a control volume is equal to the total rate of mass leaving it
The total rate of mass entering a control volume is a constant
The total amount of mass contained within a control volume does not change with time.
The conservation relations are also called __________ equations since any conserved
quantity must balance during a process. - Answers- balance
The conservation of energy principle requires that the change in the energy content of a
system be ________ the net energy transfer to or from the system during a process.
less than
more than
independent of
equal to - Answers- equal to
In a water-cooled nuclear reactor, the reactor core must be always filled with water. if
the reactor converts 20 kg of water to steam every second, select the acceptable
scenarios from the following.
The velocity of the fluid flowing in a pipe is maximum at or near the ____________ of
the pipe.
centerline
entrance
exit
wall - Answers- centerline
