AME 331 Final Exam Questions and
Answers18
Internal flows with viscosity generally have uniform velocity distributions. - ANSWERS-False
The kinetic energy correction factor, α, is generally close to unity for turbulent flows. -
ANSWERS-True
Head loss is typically due to friction. - ANSWERS-True
The continuity equation is the essential governing equation needed for studying head loss. -
ANSWERS-False
The total head loss,
Hlt, consists only of losses due to frictional effects in fully developed pipe flow. - ANSWERS-False
Pipe roughness, e, has units of length. - ANSWERS-True
The Moody diagram relates relative pipe roughness, Reynold's number, and the friction factor. -
ANSWERS-True
The friction factor is only a function of the Reynold's number for turbulent flow. - ANSWERS-
False
The friction factor is only a function of the pipe roughness for a laminar flow. - ANSWERS-False
,Pipes with smaller diameters will have less head loss. - ANSWERS-False
Head loss increases with flow rate. - ANSWERS-True
When using the ideal gas law, you must use an absolute temperature scale. - ANSWERS-True
In the ideal gas model the internal energy, u, is a function of temperature alone. - ANSWERS-
True
Mass is an intensive property of a system. - ANSWERS-False
Kinetic Energy is an intensive property of a system. - ANSWERS-False
Pressure is an intensive property of a system. - ANSWERS-True
Velocity is an extensive property of a system. - ANSWERS-False
Work is an extensive property of a system. - ANSWERS-True
Temperature scale conversion: Convert 20∘C to K - ANSWERS-293 K
Temperature scale conversion: Convert 98F to C - ANSWERS-37 C
All liquids are fluids. - ANSWERS-True
An example of fluid statics would be a thermometer. - ANSWERS-True
, Newton's second law of motion states that mass is conserved. - ANSWERS-False
The first law of thermodynamics, states that the net force on an object is equal to the mass of
the object multiplied by the acceleration of the object. - ANSWERS-False
A closed system must be an isolated system. - ANSWERS-False
The concepts of closed and isolated in regards to a system are independent concepts. -
ANSWERS-False
A system cannot be both closed and isolated. - ANSWERS-False
A closed system is also known as a control mass because no mass can escape the system. -
ANSWERS-True
An open system is a system where mass passes through the system. - ANSWERS-True
A control volume is a well-defined region in space that need not correspond to particular fluid
particles. - ANSWERS-True
The expansion of steam in a piston-cylinder is a situation well-suited for using a control volume
analysis. - ANSWERS-True
A system is in steady state if its properties are independent of time. - ANSWERS-True
A system is said to be homogeneous if its properties are independent of space. - ANSWERS-True
Answers18
Internal flows with viscosity generally have uniform velocity distributions. - ANSWERS-False
The kinetic energy correction factor, α, is generally close to unity for turbulent flows. -
ANSWERS-True
Head loss is typically due to friction. - ANSWERS-True
The continuity equation is the essential governing equation needed for studying head loss. -
ANSWERS-False
The total head loss,
Hlt, consists only of losses due to frictional effects in fully developed pipe flow. - ANSWERS-False
Pipe roughness, e, has units of length. - ANSWERS-True
The Moody diagram relates relative pipe roughness, Reynold's number, and the friction factor. -
ANSWERS-True
The friction factor is only a function of the Reynold's number for turbulent flow. - ANSWERS-
False
The friction factor is only a function of the pipe roughness for a laminar flow. - ANSWERS-False
,Pipes with smaller diameters will have less head loss. - ANSWERS-False
Head loss increases with flow rate. - ANSWERS-True
When using the ideal gas law, you must use an absolute temperature scale. - ANSWERS-True
In the ideal gas model the internal energy, u, is a function of temperature alone. - ANSWERS-
True
Mass is an intensive property of a system. - ANSWERS-False
Kinetic Energy is an intensive property of a system. - ANSWERS-False
Pressure is an intensive property of a system. - ANSWERS-True
Velocity is an extensive property of a system. - ANSWERS-False
Work is an extensive property of a system. - ANSWERS-True
Temperature scale conversion: Convert 20∘C to K - ANSWERS-293 K
Temperature scale conversion: Convert 98F to C - ANSWERS-37 C
All liquids are fluids. - ANSWERS-True
An example of fluid statics would be a thermometer. - ANSWERS-True
, Newton's second law of motion states that mass is conserved. - ANSWERS-False
The first law of thermodynamics, states that the net force on an object is equal to the mass of
the object multiplied by the acceleration of the object. - ANSWERS-False
A closed system must be an isolated system. - ANSWERS-False
The concepts of closed and isolated in regards to a system are independent concepts. -
ANSWERS-False
A system cannot be both closed and isolated. - ANSWERS-False
A closed system is also known as a control mass because no mass can escape the system. -
ANSWERS-True
An open system is a system where mass passes through the system. - ANSWERS-True
A control volume is a well-defined region in space that need not correspond to particular fluid
particles. - ANSWERS-True
The expansion of steam in a piston-cylinder is a situation well-suited for using a control volume
analysis. - ANSWERS-True
A system is in steady state if its properties are independent of time. - ANSWERS-True
A system is said to be homogeneous if its properties are independent of space. - ANSWERS-True
