What is an ideal fluid?
A. Very viscous
B. One which obeys Newton's law of viscosity
C. Compressible flow
D. Frictionless and incompressible
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Which one of the following is not a result of surface tension?
A. Nearly spherical drop of rain
B. Capillary rise
C. Removal of dirt by soap or detergent
D. Flow of a liquid
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Pressure inside a soap bubble is
A. More than atmospheric pressure
B. Less than atmospheric pressure
C. Equal to atmospheric pressure
D. Half of atmospheric pressure
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Match the columns.
Column I
Column II
a. Viscosity
1. Oil rises in the narrow long tube
b. Capillarity
2. tendancy to contract
c. Surface tension
3. Attractive between molecules of same substances
d. Cohesive force
4. Fluid friction
A. a-4, b-2, c-3, d-1
B. a-4, b-3, c-2, d-1
C. a-4, b-1, c-2, d-3
D. a-4, b-1, c-3, d-2
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A body is floating in a liquid partly immersed. The body and the liquid are taken to moon. The body
A. will continue to float as before
B. floats with greater part immersed
C. floats with lesser part immersed
D. will sink
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The force of attraction applied between molecules of the same substance is called:
A. cohesive force
B. adhesive force
C. capillarity
D. surface tension
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Viscosity is the property of liquids by virtue of which they
A. attract other molecules
B. become conducting
C. oppose the relative motion of its parts
D. push neighbouring molecules
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Assertion (A): When a ship enters a sea from a river, it rises a little.
Reason (R): The density of sea water is greater than that of river water.
In the context of the above statements, which of the following is true?
A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true, but (R) is not the correct explanation of (A)
C. (A) is true, but (R) is false
D. (A) is false, but (R) is true
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In automobile hydraulic brakes work on
A. Archimedes Principle
B. Newton's law of motion
C. Bernoulli's Principle
D. Pascal's Law
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Static science is associated with
A. Dynamic situation
B. Situation of rest
C. Mental situation
D. Data analyzing
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It which temperature is the density of water maximum?
A. 0° Celsius
B. 100° Celsius
C. 50° Celsius
D. 4° Celsius
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It is difficult to cut things with a blunt knife because
A. the pressure exerted by knife for given force increases with increase in bluntness
B. a sharp edge decreases the pressure exerted by knife for a given force
C. a blunt knife decreases the pressure for a given force
D. a blunt knife decreases the area of intersection
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Consider the following statements.
1. The liquid pressure is inversely proportional to the density of liquid.
2. The pressure exerted on the liquid doesn't depend upon the shape or size of the container.
Which of the statement(s) given above is/are correct?
A. Only 1
B. Only 2
C. Both 1 and 2
D. Neither 1 nor 2
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Water rises in plant fibres due to
A. capillarity
B. viscosity
C. fluid pressure
D. osmosis
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The working of an atomiser depend upon
A. Bernoulli's Theorem
B. Boyle's Law
C. Archimedes Principle
D. None of the above
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The density of water is 1 g./cc. This is strictly valid at
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The building and movement of ships is based on . . . . . . . .
A. Downward direction
B. Opposite direction
C. Same direction
D. Upward direction
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The property of matter by virtue of which a body tends to regain its original shape and size after the removal of deforming force is called
A. plasticity
B. elasticity
C. stress
D. capillarity
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The unit of strain is
A. Newton
B. Kilogram
C. Kelvin
D. None of these
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Assertion (A) Machine parts or jammed in winter.
Reason (R) The viscosity of lubricant used in machine parts increase at low temperature.
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true, but R is not the correct explanation of A
C. A is true, but R is false
D. A is false, but R is true
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