Hydraulics Online Test - Paper 3

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Vikash chaudhary

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1 / 30

1. Water belongs to

a) compressible fluids

b) none of the above

c) Newtonian fluids

d) non-Newtonian fluids

2 / 30

2. When the fluid is at rest, the shear stress is

a) maximum

b) zero

c) unpredictable

d) none of the above

3 / 30

3. The viscosity of liquids varies with temperature

a) directly proportional

b) inversely proportional

c) constant

d) none of the above

4 / 30

4. *The types of instrument used to measure low pressure with accuracy is

a) piezometer

b) barometer

c) micro manometer

d) mechanical gauge

5 / 30

5. Mach number is the ratio of inertia force to

a) viscosity

b) Froude number

c) gravitational force

d) elasticity

6 / 30

6. The continuity equation

a) expresses the relationship between work and energy

b) relates the momentum per unit volume between two points on a stream line

c) relates the mass rate of flow along a stream line

d) requires that Newton's second law of motion be satisfied at every point in the fluid.

7 / 30

7. *The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid if

a) the area is horizontal

b) the area is vertical

c) the area is inclined

d) all of the above

8 / 30

8. *If the volume of liquid weighing 3000 kg is 4 cubic meters, then the specific gravity is

a) 750 kg/m^3

b) 12000 kg/m^3

c) 1.33

d) 0.75

9 / 30

9. The head of water representing in the case of HGL line is known as

a) static head

b) residual head

c) pressure head

d) all of the above

10 / 30

10. For any channel section, the specific energy increase with

a) decreases in depth of super critical flow

b) increases in depth of super critical flow

c) increases in depth of sub critical flow

d) none of the above

11 / 30

11. *A pitot tube is used to measure

a) pressure

b) different in pressure

c) velocity of flow

d) none of the above

12 / 30

12. Mass density of liquid (p) is given by

a) p = mass/volume

b) p = metric slug/m^2

c) p = kgsec^3/m^4

d) all of the above

13 / 30

13. *Capillary rise is proportional to

a) surface tension

b) unit weight of water

c) diameter of the pipe

d) none of the above

14 / 30

14. To ensure that water does not rise more than 100 cm above the crest, for a discharge of 5.00 m^3/sec, the length of the weir will be (Cd = 0.62)

a) 2.48 m

b) 2.73 m

c) 2.50 m

d) 2.51 m

15 / 30

15. Poise is the unit of

a) mass density

b) kinematic viscosity

c) viscosity

d) pressure gradient

16 / 30

16. The phenomenon of rising of a liquid surface in a tube of small diameter relative to the adjacent normal level of the liquid is known as

a) capillary rise

b) capillary fall

c) rising

d) none of the above

17 / 30

17. *To measure very low pressure, we use:

a) barometers

b) piezometers

c) monometers

d) differential manometers

18 / 30

18. The minimum head loss will occur in

a) orifice meter

b) venturimeter

c) nozzle meter

d) none of the above

19 / 30

19. As per our convenience which one is correct with respect to the dimensionless number?

a) WIS-MIE-RIV-FIG-EIP

b) WIE-MIS-RIV-FIG-IEP

c) MIE-WIS-RIG-FIV-PIE

d) WIG-MIS-RIE-FIV-IPE

20 / 30

20. *The discharge passing through the crest having a length of 1.25m, a height of the flow of water 0.25m, and C_d = 0.035 is

a) 0.0116 cm³/sec

b) 0.116 cm³/sec

c) 0.0160 cm³/sec

d) 0.00116 cm³/sec

21 / 30

21. *Capillarity of water is

a) directly proportional to surface tension

b) inversely proportional to the angle of contact

c) inversely proportional to the diameter of the pipe

d) all of the above

22 / 30

22. *The rate of flow through a V-notch varies as:

a) H

b) H1/2

c) H3/2

d) H5/2

23 / 30

23. *The hydraulic ram is a pump that works on

a) the principle of water hammer

b) the principle of centrifugal action

c) the principle of reciprocation action

d) all of the above

24 / 30

24. *If the velocity in a fluid flow does not change with respect to the length of the direction of flow, it is called

a) steady flow

b) uniform flow

c) incompressible flow

d) rotational flow

25 / 30

25. The water immediately downstream of the conduit or weir is called

a) head water

b) tail water

c) main water

d) surplus water

26 / 30

26. *If fluid or flow parameters at any given instant remain the same at every point in space, it is called:

a) steady flow

b) laminar flow

c) uniform flow

d) rotational flow

27 / 30

27. The discharge through a V-notch weir is directly proportional to:

a) the bed slope of the channel upstream

b) the depth of flow

c) the top width of the notch

d) the angle of the notch and the depth of the flow

28 / 30

28. *To measure atmospheric pressure, we use

a) barometers

b) piezometer

c) manometers

d) differential manometers

29 / 30

29. *The magnitude of capillary rise is more in:

a) silts

b) sands

c) clays

d) gravels

30 / 30

30. To avoid an interruption in the flow of a siphon, the air vessel is provided

a) at the inlet

b) at the outlet

c) at the summit

d) at the point between the inlet and outlet

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Hydraulics Online Test – Paper 3

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