Fluid Mechanics Set 2

metres2 per sec ✘ kg sec/metre ✘ newton-sec per metre ✘ newton-sec per metre ✔ none of the above. ✔

specific viscosity ✘ viscosity index ✘ kinematic viscosity ✘ coefficient of viscosity ✔ coefficient of compressibility. ✔

dynamic viscosity/density ✘ dynamicviscosity x density ✘ density/dynamic viscosity ✘ 1/dynamicviscosity x density ✔ same as dynamic viscosity. ✔

pascal ✘ poise ✘ stoke ✘ faraday ✔ none of the above. ✔

4 ✘ all temperature. ✔

h ✘ wh ✘ w/h ✘ h/w ✔ h/wh. ✔

Viscosity of a fluid is that property which determines the amount of its resistance to a shearing force ✘ Viscosity is due primarily to interaction between fluid molecules ✘ Viscosity of liquids decreases with in-crease in temperature ✘ Viscosity of liquids is appreciably affected by change in pressure ✔ Viscosity is expressed as poise, stoke, or saybolt seconds. ✔

is uniform flow ✘ is steady uniform flow ✘ takes place in straight lines ✘ involves zero transverse component of flow ✔ takes place in one dimension. ✔

it has low vapour pressure ✘ it is clearly visible ✘ it has low surface tension ✘ it can provide longer column due to low density ✔ is provides suitable meniscus. ✔

25 kN/m2 ✘ 245 kN/m2 ✘ 2500 kN/m2 ✘ 2.5kN/m2 ✔ 12.5 kN/m2. ✔