Practice test

Mechanical properties of matter - Test Set 2

Review 20 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

20 questions

Questions and explanations

  1. Question 1

    What will happen to the level of water in a vessel when a piece of ice floating in it melts?
    1. Decreases
    2. Increases
    3. Remains same
    4. First increases and then decreases
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  2. Question 2

    Whether an object will float or sink in a liquid, depends on:
    1. Mass of the object only
    2. Mass of the object and density of liquid only
    3. Difference in the densities of the object and liquid
    4. Mass and shape of the object only
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  3. Question 3

    If some object is weighed when submerged in water, then what will happen to its weight compared to its weight in air?
    1. Increases
    2. Decreases
    3. Remains exactly the same
    4. Increases or decreases cannot be predicted
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  4. Question 4

    Assertion (A) The ships of iron and the boats of wood float in water but the nails iron sink.
    Reason (R) The special design and shape of the ship and the boat through which weight of displaced water are more than the weight of the ship and boat, due to which more force of buoyancy becomes operative and the ships or boats floats. But the weight of the water displaced by the nails is less than the weight of nails that is why nails sink.
    1. If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
    2. If both Assertion and Reason are true but Reason is not the correct explanation of the Assertion.
    3. Assertion is true but Reason is false.
    4. If both Assertion is false but Reason is true.
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  5. Question 5

    A liquid drop shrink due to own particles and occupies the minimum possible area. This phenomena is called:
    1. Surface tension
    2. Elastic force
    3. Gravitational force
    4. Viscous force
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  6. Question 6

    If density of air is 1.30 g/lit., what is the volume occupied by 7.8 g of air?
    1. 10 lit.
    2. 6 lit.
    3. 6.5 lit.
    4. 10.10 lit.
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  7. Question 7

    Viscosity of a liquid:
    1. Increases with increase in temperature
    2. Decreases with increase in temperature
    3. Independent of temperature
    4. Decreases with increase in pressure
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  8. Question 8

    When a ship enters the sea from a river, it floats up because:
    1. Sea water is warmer
    2. The speed of the ship on the sea is greater
    3. The density of the river water is greater
    4. Salt water of the sea is denser
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  9. Question 9

    A ball is dropped from a given height. If its collision with the ground is fully elastic, it will reach a height:
    1. Less than before
    2. Same as before
    3. More than before
    4. Height will not depend on a elasticity
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  10. Question 10

    When a body is lifted by hand, what type of work is performed by hand?
    1. First type of lever
    2. Second type of lever
    3. Third type of lever
    4. Simple machine
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  11. Question 11

    Two ends of a tube is closed by corks so that the tube become airtight. The pressure of air inside the closed tube is:
    1. Very small
    2. Slightly less than the atmospheric pressure
    3. Equal to the atmospheric pressure
    4. Dependent on the length of the tube
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  12. Question 12

    After a shower, it becomes difficult to drive a car at high speed on the wet road because:
    1. Friction decreases
    2. Friction increases
    3. Friction becomes zero
    4. More force cannot be applied on the car
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  13. Question 13

    A piece of cotton cloth gets wet if one end of it is dipped in water in a glass. This is due to:
    1. Gravitation
    2. Viscosity
    3. Elasticity
    4. Capillarity
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  14. Question 14

    A tube-well will not work if the depth of water below the ground is:
    1. 20 ft.
    2. 25 ft.
    3. 28 ft.
    4. 38 ft.
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  15. Question 15

    Same force is applied to two bodies A and B of masses m and 5m respectively for the same time. Then
    1. Velocity of A and B will be same
    2. Momentum of A and B will be same
    3. Momentum of A will be greater
    4. Momentum of B will be greater
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  16. Question 16

    A piece of metal plate with a circular hole is heated. If the metal plate expands on heating, the diameter of the hole will:
    1. Increase
    2. Decrease
    3. Increase or decrease depending on the diameter of the hole
    4. Increase or decrease depending upon the metering of the plate
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  17. Question 17

    An ice cube containing a large bubble of air is floating in water contained in a large breaker. When the ice melts completely, the level of water will:
    1. Remain unchanged
    2. Go down
    3. Rise
    4. First rise and then go down
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  18. Question 18

    Water is boiling in a flask over a burner. To reduce its boiling temperature one must:
    1. Reduce the surrounding temperature
    2. Connect the mount of the flask to an evacuating system
    3. Supply heat from a less intense source
    4. Connect the mouth of the flask to a compressor
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  19. Question 19

    A shaving brush is dipped in water. When taken out the hairs of the brush are seen to be drawn together due to:
    1. Surface tension of water
    2. Viscosity of water.
    3. Elasticity of the hairs of the brush.
    4. Temperature difference between air and water.
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  20. Question 20

    The absorption of ink by blotting paper involves –
    1. Viscosity of ink
    2. Capillary action
    3. Diffusion of ink
    4. Siphon action
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