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NCAT - Practice Test - Physics - Fluid Dynamics Quiz

Attempt 10 MCQs on NCAT - Practice Test - Physics - Fluid Dynamics | Quiz 7

61. What is the SI unit of dynamic viscosity?



62. What is the SI unit of kinematic viscosity?



63. Which law describes laminar flow through a cylindrical tube?



64. In Poiseuille's law, flow rate through a tube is proportional to:



65. A pipe has flow rate Q. If radius is reduced by half, new flow rate (same pressure) is:



66. What is true about drag coefficient?



67. Typical drag coefficient for a well-streamlined car is about:



68. Water flows in a pipe of radius 2 cm at 2 m/s. It enters a constriction of radius 1 cm. Find velocity in constriction.



69. Water flows in a horizontal pipe: at wide section P₁=2×10⁵ Pa, v₁=2 m/s, area 8 cm². At narrow section area 4 cm². Find P₂ (ρ=1000 kg/m³).



70. A steel ball of radius 1 mm falls in water (ρ=7800 kg/m³, η=0.001 Pa·s). Find terminal velocity (g=10).



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