Which of the following is not a property of heavy water ?
A. Boiling point of heavy water is lower than that or ordinary water
B. Density of heavy water is higher than that of ordinary water
C. Freezing point of heavy water is higher than that of ordinary water
D. It produces corrosion
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Which of the following liquids is most viscous?
A. Oil
B. Milk
C. Water
D. Petrol
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Small bubbles are perfectly spherical because of
A. Gravity
B. Pressure
C. Viscosity
D. Surface tension
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Pitot tube is used to measure
A. Static pressure
B. Velocity at stagnation point
C. Stagnation pressure
D. Dynamic pressure
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A spherical ball made of steel when dropped in mercury container
A. Sink in mercury
B. Will be on the surface of mercury
C. Will be partly immersed mercury
D. Will dissolve in mercury
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If cream is removed from milk, its density
A. Increases
B. Decreases
C. Remains the same
D. May increase or decrease
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A falling drop of rain water acquires the spherical shape due to
A. Viscosity
B. Surface Tension
C. Atmospheric pressure
D. Gravitational force
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Why the needle of iron swims on water surface when it is kept gently ?
A. It will remain under the water, when it will displace more water than its weight
B. The density of needle is less than that of water
C. Due to surface tension
D. Due to its shape
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Rise of oil a wick is due to
A. Density of the oil
B. Viscosity of the oil
C. Surface tension of the oil
D. Pressure of the oil
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Bubbles of air rise up through liquids due to
A. Surface tension and adherence
B. Viscosity and buoyancy
C. Air current over the liquid and buoyancy
D. Up thrust and surface tension
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An oil drop spreads over water because
A. Oil is lighter than water
B. Oil is more viscous
C. Oil does not mix with water
D. water has a higher surface tension
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Rotameter is used to measure
A. Vortex flow
B. Density of fluids
C. Velocity of fluid in pipes
D. Flow of fluids
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Siphon will fail to work if
A. The level of the liquid in the two vessels are at the same height
B. The temperature of the liquids in the two vessels are the same
C. The densities of the liquid in the two vessels are equal
D. Both its limbs are of unequal length
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Sprayer functions on
A. Bernouli's principle
B. Archemede's principle
C. Pascal's law
D. Floatation principle
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A drop of liquid assumes spherical shape because:
A. Intermolecular forces are strong in liquids
B. A sphere has the least surface area for a given volume
C. A sphere has the largest surface area for a given volume
D. Inter molecular forces are weak in liquids
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A tank filled partially with a liquid is subjected to a uniform horizontal acceleration. Which of the following is true for the surface of liquid in the tank?
A. The liquid surface falls down on the direction of motion and rises up on the back side of the tank
B. The liquid surface falls down only at the center of the tank
C. The surface of the liquid remains horizontal
D. None
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The lift of an aeroplane is caused by
A. Law of gravitation
B. Theorem of continuity
C. Pascel's law
D. Bernouli's theorem
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Which of the following instrument is used to measure Soil Water Tension?
A. Photometer
B. Pyrometer
C. Psychrometer
D. Tensiometer
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Blotting paper absorbs ink due to
A. Capillary action phenomenon
B. Diffusion of ink through the blotting
C. Siphon action
D. Viscosity of ink
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Name the process by which bubbles from liquid are formed?
A. Effervescence
B. Surface Tension
C. Surface Energy
D. Degasification
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