MNE 332 Fluid Mechanics Exam Questions and Answers Rated 100%

MNE 332 Fluid Mechanics Exam Questions and Answers Rated 100% What is a Fluid - Answers A substance that deforms under any shearing stress What is meant by defining a fluid as "continium" - Answers Fluid parameters vary continuously throughout the fluid Examples of Primary Qualities - Answers -Length -Time -Mass -Temperature What is meant by a dimensionally homogeneous equation - Answers -Dimensions on the left side of the equation must match the dimensions on the right There are strong similarities between the general approach to fluid mechanics and what - Answers -rigid body and deformable body solid mechanics Specific Volume is the reciprocal of what measurement - Answers -Density The broad subject of fluid mechanics can be divided into? - Answers -fluid statics -fluid dynamics Definition of specific gravity - Answers -ratio of the density of a fluid to the density of water The pressure in a fluid at rest is defined as the BLANK force per unit area exerted on a plane surface immersed in a fluid - Answers -NORMAL Since large pressures are required to effect a change in volume, we conclude that liquids can be considered as BLANK for most practical engineering applications - Answers -Incompressible Another term for the speed of sound - Answers -acoustic velocity Boiling which is the formation of vapor bubbles within the fluid mass, is initiated when the BLANK in the fluid reaches the vapor pressure - Answers -Absolute Pressure The development of vapor pressure related to which of the following(Boiling Point, Molecular activity, atmospheric pressure) - Answers -Molecular Activity The rise of fall of a liquid capillary tube is a common phenomena associated with which of the following (difference in pressure, surface area, surface tension) - Answers -surface tension Pascals Law - Answers -The pressure at a point in a fluid at rest or in motion is independent of direction as long as there are no shearing stresses present What forces act upon a fluid if no shearing stresses are present? - Answers -Pressure -Weight Does Pressure vary across a fluid particle - Answers Pressure may vary (doesn't have to though) Two types of forces act on a fluid element - Answers -Body forces -surface forces Which of Newtons laws is applied to the fluid element to develop the basic equation for the pressure field - Answers -2nd Law -F=ma What is the level of the atmosphere closest to the surface of the earth - Answers -troposphere Can absolute pressure be positive or negative - Answers -always positive What does a negative Gage pressure mean? - Answers -a vacuum pressure exists in the measured fluid Two uses of the U-tube manometer are to measure the pressure of one vessel, and to measure BLANK between two separate containers or points in a system. - Answers Pressure Difference Why are meniscus or capillary effects not important in a U-tube manometer? - Answers -Assuming that the surface tensions and tube diameters are the same at each fluid interface, the effects usually cancel. If not, they can be made negligible by using a larger tube bore. What advantages do mechanical and electronic measuring devices hold over manometers? - Answers -Manometers are not well suited for measuring very high pressures. Or pressures that are changing rapidly with time. Manometers require more space and are more time consuming to read. In a Bordon pressure gage, a zero reading indicates that the pressure is equal to what pressure? - Answers -the atmospheric pressure The resultant force of a static fluid on a plane surface is due to the hydrostatic pressure distribution on the surface - Answers yes The magnitude of the resultant fluid force is equal to the volume of the pressure prism and passes through the centroid. - Answers yes Can a pressure prism be used for irregular shapes?Enter your answer in accordance to the question statement - Answers no Archimedes Principle - Answers the buoyant force on an object is equal to the weight of the fluid displaced by the object and is directed vertically upward