Physics

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

113/9d

23/18d

18/11d

11/7d

Question 1 of 15

2. Soap helps in better cleaning of clothes because:

It reduces the surface tension of solution

It does not reduces the surface tension of solution

It absorbs the dirt

Chemical of soaps change

Question 2 of 15

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

Equal to your normal weight

Half to your normal weight

Greater than the weight of water you displace

Zero

Question 3 of 15

4. Pressure applied to enclosed fluid is:

Increases and applied to every part of the fluid

Transmitted unchanged to every portion of the fluid and walls of containing vessel

Diminished and transmitted to wall of container

Increased in proportion to the mass of the fluid and then transmitted

Question 4 of 15

5. A drop of oil is placed on the surface of water. Which of the following statement is correct?

It will float as a distorted drop on the water surface

It will partly be as spherical droplets and partly as thin film

It will spread as a thin layer

It will remain on it as a sphere

Question 5 of 15

6. 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:

Lighter

Shows no change in weight

Lighter in the beginning and heavier afterwards

Heavier

Question 6 of 15

7. If there were smaller gravitational effect which of the following forces do you think will alter in some respect?

Archimedes’ uplift

Nuclear forces

Viscous force

Electrostatic

Question 7 of 15

8. IF two soap bubbles of different radii are in communication with each other:

The sizes of the bubbles remain unchanged

Air flows from the larger bubble into the smaller one until the two bubbles are of equal size

Air flows from the larger into the smaller bubble until the radius of the smaller one becomes equal to that of the larger one

Air flows from the smaller bubble into the larger one and larger bubble grows at the expense of the smaller one

Question 8 of 15

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

Addition of soap to water increases its density

Addition of soap to water makes surface tension of water zero

Addition of soap to water decreases surface tension of water

Addition of soap to water increases surface tension of water

Question 9 of 15

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

More than the upward buoyant force

Equal to the upward buoyant force

Less than the upward buoyant force

Half of the buoyant force

Question 10 of 15

11. 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:

Will neither rise nor sink

Will be unpredictable

Will sink

Will rise

Question 11 of 15

12. 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

Falls

Rises

None of these

Unchanged

Question 12 of 15

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

Horizontally to line with its center of gravity

Vertically below its center of gravity

May be anywhere

Vertically above its center of gravity

Question 13 of 15

14. More liquid rises in a thin tube because of:

Larger value of radius

Small value of radius

Larger value of surface tension

Small value of S.T.

Question 14 of 15

15. Find the lifting force of a 4 kg cork life but in sea water if the density of cork and sea water are 0.2 x 10³ kg/m³ and 1.03 x 10³ kg/m³ respectively

119 N

289 N

273 N

163 N

Question 15 of 15

Test Name	Physics Fluid Mechanics Test Online MCQs
Subject	Physics
Test Type	MCQs
Total Question	15
Total Marks	30
Total Time	15 Mints
Test Help For	Physics Subject Test Prep. All Admissions Test. All Jobs Test prep. Medical Test prep. Engineering Test prep.

Test By Subject	Biology
Test By Topics	Biology Subject

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Physics Fluid Mechanics Test Online MCQs

Physics Fluid Mechanics Test Online MCQs

Physics

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