1. The radius of gyration of the water line of a floating ship is 4 m and its metacentric height is 72.5 cm. The period of oscillation of the ship, is
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Correct Answer:
3π
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2. For the most economical trapezoidal open channel,
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Correct Answer:
All of these
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3. When a body is totally or partially immersed in a fluid, it is buoyed up by a force equal to
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Correct Answer:
Weight of the fluid displaced by the body
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4. The ratio of maximum velocity to average velocity of viscous fluid through a circular pipe is
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Correct Answer:
2.00
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5. The height of water level in a tank above the centre of a circular hole 2.5 cm in diameter is 50 m. The velocity of water flowing through the hole, is
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Correct Answer:
31.3 m/sec
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6. The momentum correction factor (β) for the viscous flow through a circular pipe is
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Correct Answer:
1.33
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7. The discharge through a 100 mm diameter external mouth piece fitted to the side of a large vessel is 0.05948 m3/s. The head over the mouth piece is
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Correct Answer:
4.0 m
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8. Bernoulli's equation assumes that
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Correct Answer:
All these
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9. For critical depth of flow of water in open channels, fc the specific energy must be :
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Correct Answer:
Minimum
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10. A pipe of 0.1 m2 cross sectional area suddenly enlarges to 0.3 m2 cross-sectional area. If the discharge of the pipe is 0.3 m3 /sec, the head loss is
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Correct Answer:
2/g m of water
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11. In flow, the liquid particles may possess
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Correct Answer:
All these
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12. The horizontal component of the force on a curved surface is equal to
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Correct Answer:
Weight of liquid retained by the curved area
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13. Cavitation is caused by
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Correct Answer:
Low pressure
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14. Unit of kinematic viscosity is
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Correct Answer:
M2/sec
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15. A pitot tube is used to measure
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Correct Answer:
Velocity of flow
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16. If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.1 kg/cm2, the pressure at a depth of 2.5 m, is
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Correct Answer:
3 metres of water
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17. The shear stress distribution in viscous fluid through a circular pipe is:
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Correct Answer:
Same throughout the section
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18. Flow in pipes is laminar if Reynold number is
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Correct Answer:
Less than 2100
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19. A rectangular channel 6 m wide and 3 m deep and having a bed slope as 1 in 2000 is running full. If Chezy's constant C = 54.8, pick up the correct specification of the channel from the following :
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Correct Answer:
All these
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20. Liquids
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Correct Answer:
Do not occupy definite shape
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