Punjab 11th Class Physics Chapter 6 Fluid Dynamics Mcqs Test Online Physics Chapter 6 Fluid Dynamics Mcqs Test Online Punjab 11th Class 123456789101112Show paginator Hide paginator 8% Question 1 of 12Physics 1. A 3m tall cylinder, full of water, has four identical small holes at height 2.1m, 2.3m and 2.4 meter. The speed of efflux is maximum from 2.4 m high hole 2.3 m high hole 2.2 m high hole 2.1 m high hole Question 1 of 12Question 2 of 12 2. Water flows steadily through a horizontal pipe of a variable cross-section. If the pressure at another point where the velocity of fluid flow is 2v₁ consider ‘p’ as density of water. P – 2pv² P – 3/2 pv² P + 2pv²P + 3/2 pv² Question 2 of 12Question 3 of 12 3. Two capillary tubes A and B of equal radii ra=rb=r and equal length la=lb=l are held horizontally. When the same pressure difference P is maintained across each tube, the rate of flow of water in each is Q. If the tubes are connected series and the same pressure difference P is maintained across the combination, the rate of flow through the combination will be Q √2Q2Q Q/2 Question 3 of 12Question 4 of 12 4. A rain drop of radius ‘r’ falls in air with a terminal speed vt. What is the terminal speed of a rain drop of radius 2r? v 4vt vt 2vtQuestion 4 of 12Question 5 of 12 5. A rectangular tank is filled completely with water. When a hole at its bottom is unplugged, the tank is emptied in time T. If the tank is half filled with water, it will be emptied in time. T/2√2T/2 T/√3 1/√2 Question 5 of 12Question 6 of 12 6. According to Stoke’s law, drag force depends on Instantaneous velocity Final velocity Initial velocity Terminal velocity Question 6 of 12Question 7 of 12 7. Eight spherical rain drops of same mass and radius are falling down with a terminal velocity of 6 cm s⁻¹. If they coalesce to form on big drop, what will be its terminal speed? Neglect the buoyancy due to air. 6 cm s⁻¹ 32 cm s⁻¹24 cm s⁻¹ 1.5 cm s⁻¹ Question 7 of 12Question 8 of 12 8. The cylinder tube of a spray pump has a radius R, one end of which has ‘n’ number of fine uniform holes, each of radius ‘r’. If the speed of flow of the fluid in the tube is v₁, the speed of ejection of the liquid through the holes id v/n(R/r)² v/n(R/r) None of thesev/n(R/r)³ Question 8 of 12Question 9 of 12 9. With increase of temperature viscosity Remains same Decrease Double Increase Question 9 of 12Question 10 of 12 10. The smooth or steady steam – line flow is known as” Turbulent flow Both a and b Laminar flow None of these Question 10 of 12Question 11 of 12 11. A person standing near the track of a fast moving train has tendency to fall towards it because of: The high speed of train Some other effect Vibration due to motion of train Gravitation force of attraction between person and trains Question 11 of 12Question 12 of 12 12. In a test experiment on a model airplane in a wind tunnel. The flow speeds on the lower and upper surface of the wings are ‘v’ and √2v respectively. If the density of air is ‘r’ and the surface area of the wing is given. 1/√2pv²A 2pv²A 1/2pv²A √2pv²A Question 12 of 12 Loading... Test By Subject Punjab Test By Topics 11th Class Physics You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.