Practice test

Mechanical properties of matter - Test Set 5

Review 14 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

14 questions

Questions and explanations

  1. Question 1

    The wall of a dam is made thicker at the bottom than at the top because the pressure exerted by the water on the wall:
    1. Depends on the thickness of the wall
    2. Increases with height of the wall
    3. Increases with depth of the wall
    4. Depends on the area of the wall
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  2. Question 2

    It is easier for a man to swim in sea water, than in river water because:
    1. the density of sea water is more than the density of river water
    2. the sea is deeper than the river
    3. the sea is wider than the river
    4. the density of sea water is lesser than the density of river water
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  3. Question 3

    When a body is immersed in a liquid, the force acting on it is:
    1. Upthrust
    2. Weight
    3. Mass
    4. Both A and B
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  4. Question 4

    Stress can be defined as:
    1. Scalar
    2. Phasor
    3. Vector
    4. Tensor
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  5. Question 5

    The spring balance works on the principle of:
    1. Boyle's Law
    2. Bernoulli's principle
    3. Hooke's Law
    4. Pascal's Law
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  6. Question 6

    If two bubbles of soap of different diameter come in contact with a tube, then what will happen?
    1. The size of both the bubbles will remain same
    2. The smaller bubble will become smaller and bigger will become bigger
    3. The smaller bubble will become larger and larger will become smaller to get the same size
    4. Both bubbles will burst as soon as they come in contact
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  7. Question 7

    While floating in a sea what part of an iceberg is above the surface of the sea?
    1. 1/9
    2. 1/4
    3. 1/6
    4. 1/10
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  8. Question 8

    Assertion (A): A piece of copper and a piece of glass are heated to the same temperature. When touched, thereafter, the copper piece appears hotter than the glass piece.
    Reason (R): The density of copper is more than that of glass.
    1. Both A and R are true and R is the correct explanation of A
    2. Both A and R are true but R is not a correct explanation of A
    3. A is true but R is false
    4. A is false but R is true
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  9. Question 9

    A solid piece of iron sinks in water but floats in mercury because -
    1. Average density of water & mercury is less than that of iron
    2. Density of iron is less than that of water as well as mercury
    3. Density of iron is more than that of water as well as mercury
    4. Density of iron is more than that of water but less than that mercury
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  10. Question 10

    The hydraulic breaks used in automobiles is a direct application of -
    1. Bernoulli’s theorem
    2. Toricellan law
    3. Pascal’s law
    4. Archimedes Principal
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  11. Question 11

    A ballon filled with hydrogen bursts on reaching high altitude because:
    1. Pressure inside ballon becomes less
    2. Pressure inside ballon becomes more
    3. Surface of the balloon gets melted
    4. It is a natural phenomenon
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  12. Question 12

    A glass bulb is balanced by a brass weight on a sensitive beam balance. Now the balance is covered by a bell-jar which is then evacuated :
    1. The beam will continue to remain horizontal
    2. The pan containing the bulb will go up
    3. The pan containing the bulb will go up or down depending on degree of vaccum produced
    4. The pan containing the bulb will go down
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  13. Question 13

    The relative humidity inside a room is 50% while the temperature is 30°C. If the temperature become 40°C, then the relative humidity
    1. Will increase
    2. Will decrease
    3. Will remain unchanged
    4. Will increase or decrease depending upon the size of the room
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  14. Question 14

    With an ordinary balance we measure:
    1. Volume
    2. Mass
    3. Weight
    4. Density
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