Physics Fluid Mechanics Test Online MCQs

1. A vessel containing water is in equilibrium on a beam balance when a man puts his finger into the water without touching the bottom or the sides of the vessel, the scale pan on which the vessel stands:

2. A parrot is in a wire case, which is hanging from a spring balance. Initially the parrot sits in the cage and in the second instant the parrot flies inside the cage:

3. A bird, resting on the floor of an airtight box, which is being carried by a boy, starts flying. The boy will feel that the box is now:

4. Three liquids of densities d, 2d and 3d are mixed in equal volumes. Then the density of mixture is

5. A piece of ice is floating in a jar containing water, when the ice melts, the temperature of water falls from 4°C to 1°C. Then the level of water

6. A capillary tube is dipped in a water container, so that loss is weight of the capillary tube is:

7. Small droplets of liquid are usually more spherical in shape than larger drops of the same liquid because:

8. Three liquids of densities d, 2d and 3d are mixed in equal proportions of weights. The relative density of the mixture is:

9. Soldering of two metals is possible because of the property of:

10. A raft of wood (density 600 kg/m³) of mass 120 kg floats in water. How much weight can be put on the raft to make it just sink?

11. Soap helps in better cleaning of clothes because:

12. If you float on your back on water, your weight is:

13. Pressure applied to enclosed fluid is:

14. In order that a floating object be in a stable equilibrium. Its center of buoyancy should be:

15. It is easier to spray water to which soap is added, because