Hydraulics Online Test - Paper 3

Created by

Vikash chaudhary

This is a FREE online test. Beware of scammers who ask for money to attend this test.

Get fresh, new questions in each attempt.

Total Questions: 50
Time Allotted: 50 minutes
Passing Score: 70%
Randomization: Yes
Certificate: Yes
Do not refresh the page!
👍 All the best!

1 / 50

1. *The condition for the maximum velocity and discharge is given by (closed flow)

a) 0.81D & 0.95D

b) 0.82D & 0.94D

c) 0.83D & 0.93D

d) 0.84D & 0.92D

2 / 50

2. *Surface tension is the force

a) per unit length

b) per unit area

c) per unit volume

d) all of the above

3 / 50

3. Super-critical flow occurs in

a) normal slope

b) mild slope

c) steep slope

d) all of the above

4 / 50

4. *Differential manometers are used to measure

a) pressure in water channels

b) difference in pressure at two points

c) atmospheric pressure

d) very low pressure

5 / 50

5. *A stepped notch is a combination of

a) rectangular notches of different sizes

b) triangular notches of different sizes

c) rectangular and triangular notches

d) all of the above

6 / 50

6. Which of the following quantities are dimensionless?

a) surface tension

b) specific weight

c) angular velocity

d) Mach number

7 / 50

7. *If the volume of a liquid weighing 2400 kg is 3 cubic meters, then 0.8 is its:

a) specific weight

b) specific mass

c) specific gravity

d) none of the above

8 / 50

8. *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

9 / 50

9. The basic head loss in a long pipe is:

a) fittings

b) sudden increase in diameter

c) sudden decrease in diameter

d) friction

10 / 50

10. If the total head of the nozzle of a pipe is 37.5m and the discharge is 1 cubic meter per second, then the power generated is

a) 500 HP

b) 550 HP

c) 400 HP

d) 450 HP

11 / 50

11. Cavitations in flowing fluid occurs when

a) the total energy suddenly increases

b) the total energy suddenly decreases

c) the total energy is constant

d) none of the above

12 / 50

12. Hooke's law for solids is analogous to

a) Newton's law of viscosity

b) Pascal's law

c) Boundary layer theory

d) continuity equation

13 / 50

13. *The float method is used to measure

a) the discharge in an open channel

b) the velocity in an open channel

c) discharge open in an open channel

d) all of the above

14 / 50

14. *The notch angle for the maximum discharge over a triangular notch is

a) 30°

b) 60°

c) 90°

d) 120°

15 / 50

15. A fluid particle may possess the displacement of

a) translation

b) rotation

c) distortion

d) all of the above

16 / 50

16. *Cipolletti weir is a trapezoidal weir having a side slope of

a) H:V::1:2

b) H:V::2:1

c) H:V::1:4

d) none of the above

17 / 50

17. The ratio of the percentage error in the discharge and the percentage error in the measurement of head over a triangular notch is

a) 2/3

b) 3/2

c) 2/5

d) 5/2

18 / 50

18. *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

19 / 50

19. The pressure difference between inside and outside of a droplet of water is given by (Where σ is surface tension and d is the diameter of the droplet.)

a) 2σ/d

b) 4σ/d

c) 6σ/d

d) 8σ/d

20 / 50

20. The minimum head loss will occur in

a) orifice meter

b) venturimeter

c) nozzle meter

d) none of the above

21 / 50

21. Rotation is defined as the movement of a fluid element in such a way that both of its axes rotate in...

a) the same direction

b) different directions

c) both of the above

d) none of the above

22 / 50

22. *Hydraulic gradient line (except siphon)

a) remains above the centerline of the conduit

b) remains below the centerline of the conduit

c) remains parallel to the centerline of the conduit

d) may be above or below the centerline of the conduit

23 / 50

23. ........ is defined as the maximum increase in water level in the path of the flow of water

a) afflux

b) rising of the wall

c) flood

d) rainfall

24 / 50

24. In an open channel flow

a) the velocity distribution is symmetrical about the pipe axis

b) the maximum velocity occurs at a little distance below the water surface

c) flow cross-section is fixed

d) the flow takes place at the expense of hydraulic pressure

25 / 50

25. *Pressure head is given by

a) P/w

b) z

c) v/2g

d) all

26 / 50

26. *The specific weight of water 1000 kg/m^3

a) at normal pressure of 760 mm

b) at 4°C temperature

c) at mean sea level

d) all of the above

27 / 50

27. *A flow is said to be laminar when

a) the fluid particles move in a zig-zag way

b) the Reynolds number is high

c) the fluid particles move in layers parallel to the boundary

d) none of the above

28 / 50

28. If the density of a fluid is constant from point to point in a flow region, it is called

a) steady flow

b) incompressible flow

c) uniform flow

d) rotational flow

29 / 50

29. The maximum velocity in an open channel occurs

a) at the bottom of the channel

b) at 1/2 the depth of the channel

c) slightly below the free surface

d) at the free surface

30 / 50

30. *Chazy's formula is given by

a) v = C√mi

b) v = m√ci

c) v = C√mci

d) v = i√mc

31 / 50

31. For a circular channel, the wetted perimeter is given by (where θ=half the angle subtended by the water at the center and R= radius of circular channel)

a) 2Rθ

b) 3Rθ

c) 4Rθ

d) all of the above

32 / 50

32. *The wetted perimeter of a channel is given by

a) 4.75Q^2

b) 4.75Q

c) 4.75√Q

d) none of the above

33 / 50

33. The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit is known as

a) hydraulic gradient

b) piezometric line

c) pressure grade line

d) all of the above

34 / 50

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

a) piezometer

b) barometer

c) micro manometer

d) mechanical gauge

35 / 50

35. The two depths at which the specific energy is the same are called

a) alternate depths

b) conjugate depths

c) critical depths

d) normal depths

36 / 50

36. Total pressure on the top of a closed cylindrical vessel completely filled with liquid is directly proportional to

a) radius

b) (radius)^2

c) (radius)^3

d) (radius)^4

37 / 50

37. *Bernoulli's equation assumes that

a) fluid is non-viscous

b) fluid is homogeneous

c) flow is along the streamline

d) all of the above

38 / 50

38. *The discharge through a rectangular channel is maximum when

a) m = d/2

b) d=b/2

c) m=2d

d) both (a) and (b) above

39 / 50

39. The Manning's formula for flow in an open channel is given by

a) v = n R^2/3 S^1/2

b) none of the above

c) v = 1/n R^2/3 S^1/2

d) v = 1/n R^1/2 S^2/3

40 / 50

40. The capillary rise or fall of the liquid is given by

a) h = σ cos θ / 4ρgd

b) h = 4σ cos θ / ρgd

c) h = 8σ cos θ / ρgd

d) none of the above

41 / 50

41. *Losses are more in

a) laminar flow

b) critical flow

c) turbulent flow

d) transition flow

42 / 50

42. The attraction among different particles of the same material is

a) adhesion

b) cohesion

c) corrosion

d) fusion

43 / 50

43. Open channel flow is

a) one in which the liquid is flowing in a conduit and has a free surface

b) one in which the liquid is flowing in a closed conduit running full

c) a covered channel running full

d) one in which the liquid is flowing in a conduit under pressure

44 / 50

44. In an open tube, the free surface of mercury remains

a) horizontal

b) curved upwards

c) curved downwards

d) none of the above

45 / 50

45. The upward water pressure at the base of the structure is called

a) up

b) down

c) uplist

d) downlift

46 / 50

46. A triangular notch is preferred to a rectangular notch because

a) only one reading is required

b) its formula is simple to remember

c) it gives more accurate results for low discharge (Q≤100m^3/sec)

d) it measures a wide range of flows accurately

47 / 50

47. *An independent mass of a fluid does not possess

a) elevation energy

b) kinetic energy

c) pressure energy

d) none of the above

48 / 50

48. *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

49 / 50

49. A siphon is used

a) to connect water reservoirs at different levels intervened by a hill

b) to supply water to a town from a higher level to a lower level

c) to fill up a tank with water at a higher level from a lower level

d) none of the above

50 / 50

50. Crest of a weir is lower than d/s water level

a) submerged weir

b) Cipolletti weir

c) triangular weir

d) sharp-crested weir

Please provide accurate information so we can send your Achievement Certificate by mail.

NameEmailPhone Number

Your score is

Please provide your feedback.

Thank you for your valuable feedback.

Buy Hydraulics MCQ PDF for Offline Study

Hydraulics Online Test – Paper 3

Please provide accurate information so we can send your Achievement Certificate by mail.

Related MCQs