Fluid Mechanics
Physics ⇒ Mechanics
Fluid Mechanics starts at 8 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Fluid Mechanics.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 12
A ball of mass 0.2 kg and volume 2.5 × 10⁻⁴ m³ is completely immersed in water. What is the magnitude of the buoyant force acting on it? (Density of water = 1000 kg/m³, g = 9.8 m/s²)
A block of wood floats on water with 60% of its volume submerged. What is the density of the wood if the density of water is 1000 kg/m³?
A fluid exerts pressure in all directions at a point. This is a consequence of which property of fluids?
A hydraulic press has a small piston of area 0.01 m² and a large piston of area 0.5 m². If a force of 200 N is applied to the small piston, what is the force exerted by the large piston?
A liquid flows through a horizontal pipe that narrows from a cross-sectional area of 0.05 m² to 0.01 m². If the speed of the liquid in the wider section is 2 m/s, what is its speed in the narrower section?
A pipe carries water at a velocity of 3 m/s and has a cross-sectional area of 0.02 m². What is the volume of water flowing per second?
A tank is filled with oil up to a height of 2 m. If the density of oil is 800 kg/m³, what is the pressure at the bottom of the tank? (g = 9.8 m/s²)
A U-tube manometer contains water and mercury. If the difference in mercury levels is 10 cm, what is the pressure difference between the two arms? (Density of mercury = 13,600 kg/m³, g = 9.8 m/s²)
Define the term 'incompressible fluid'.
Describe the capillary action observed when a thin tube is dipped into water.
Explain the difference between laminar and turbulent flow.
Explain why a steel needle floats on water despite being denser than water.
Explain why atmospheric pressure decreases with altitude.
State Archimedes' principle.
State Pascal's law.
