Biofluid Mechanics Certification Evaluation Exams Set Full Questions And Complete Solution

BIOFLUID MECHANICS CERTIFICATION
EVALUATION EXAMS SET FULL QUESTIONS
AND COMPLETE SOLUTION

●● What does viscosity represent
Answer: resistance to flow
decreases as the temperature increases


●● Effect of temperature and pressure on density and viscosity
Answer: Density: changes as a function of temperature and pressure
(volume change)


Viscosity: only a function of temperature


●● Concept of continuum in fluid mechanics
Answer: A continuous mass over the whole space
Presentative sample is where it is big enough so everything is there


●● Difference between gage and absolute pressure
Answer: Gage: measured with respect to absolute pressure
Absolute: measured with respect to zero

, Pabs = Pgage + atm


●● Relationship between density and unit weight
Answer: Density: mass/volume
Specific weight: density*gravity


●● Definition of specific gravity
Answer: (density/ specific weight of fluid) / (density/specific weight of
water)


●● Relationship between vapor pressure and boiling point
Answer: boiling point occurs where local pressure equals vapor pressure


●● Cavitation
Answer: Localized low pressure zones of liquids and vapor bubbles
grow in local regions of low pressure and collapse in higher pressure
downstream


●● 3 properties of pressure
Answer: Pressure acts in all directions
Pressure is normal to the surface
Fluid transmits pressure