Chapter 6 | FLUID DYNAMICS | MCQs | Balochistan text book | 11th class | F.sc

1. Viscosity of a fluid depends upon (a) Mass (b) Density (c) Volume (d) Temperature 2. Drag force exerted by the fluid on a body does not depend upon (a) Viscosity of fluid (b) Terminal velocity (c) Shape of a body (d) Volume of fluid 3. A steel ball of radius ‘r’ is moving with uniform velocity ‘v’ in the mustard oil, the drag force acting on the ball is ‘F’. What would be the drag force on the steel ball of radius 2r moving with uniform velocity 2v in the mustard oil is (a) F (b) 2F (c) 4F (d) 8F 4. When two spheres of same volume but different masses fall through a fluid then (a) Both gain their terminal velocity simultaneously (b) Neither lighter nor heavier body gains its terminal velocity (c) Lighter body gains its terminal velocity earlier (d) Heavier body gains its terminal velocity earlier 5. Laminar flow usually occurs at speeds (a) Low (b) High (c) Very High (d) Some time high & some time low 6. In incompressible fluid, which parameter remains constant? (a) Pressure (b) Volume (c) Temperature (d) Density 7. Equation of continuity has been derived on the bases of law of conservation of (a) Energy (b) Energy (c) Mass (d) Force 8. According to equation of continuity A1v1= A2v2 = constant. The constant is Equal to (a) Flow rate (b) Volume of fluid (c) Mass of fluid (d) Density of fluid 9. When cross-sectional area of a tube is decreased then the speed of fluid through it is; (a) Increased (b) Decreased (c) Same (d) Zero 10.As the water falls its speed increases, so its cross-sectional area (a) Increases (b) Decreases (c) Remains constant (d) Zero 11.Bernoulli’s equation has been derived on the bases of conservation of; (a) Mass (b) Energy (c) Momentum (d) Force 12.What is the speed of water flow through a tap which is connected with tank contains water at height of 2.5 m. (a) 5 ms-1 (b) 6 ms-1 (c) 7 ms-1 (d) 8 ms-1 13.A two meter high tank is full of water. If a hole appears at its middle, then the speed of efflux is (a) 4.42 ms -1 (b) 5.42 ms -1 (c) 6.42 ms -1 (d) 7.42 ms -1 14.Venturi-meter is an instrument which is being used for the measurement of (a) Density of fluid (b) Velocity of fluid (c) Pressure of fluid (d) Viscosity of fluid 15.When velocity of fluid is increased then its pressure is; (a) Increased (b) Decreased (c) Same (d) Not velocity dependent 16.Systolic pressure is called; (a) Low blood pressure (b) High blood pressure (c) Normal pressure (d) irregular blood pressure #11thclassmaths #physics #1st #balochistan #fsc1styear #fsc1styear #11thphysics #vector #fluid #mcqs #mcqsolve #physicsmcqs #physicsmcqsolution #physicssolutions #physics11th #physics11 #physicswallah #physicsfun #textbooksolution #physicstextbook #fluiddynamics #chapter6