Hydraulics and Fluid Mechanics MCQs Archives

41. A hemispherical tank of radius (R) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to lower the level of liquid from (H1) to (H2) will be

none of the above

✅ The correct answer is option C.

42. The Cippoletti weir is a __________ weir.

rectangular

triangular

trapezoidal

circular

✅ The correct answer is option C.

43. The coefficient of venturifiume, generally, lies between

0.3 to 0.45

0.50 to 0.75

0.75 to 0.95

0.95 to 1.0

✅ The correct answer is option D.

44. The flow in a pipe is neither laminar nor turbulent when Reynold number is

less than 2000

between 2000 and 2800

more than 2800

none of these

✅ The correct answer is option B.

45. A water tank contains 1.3 m deep water. The pressure exerted by the water per metre length of the tank is

2.89 kN

8.29 kN

9.28 kN

28.9 kN

✅ The correct answer is option B.

46. The tangential velocity of the water element having a free vortex is

directly proportional to its distance from the centre

inversely proportional to its distance from the centre

directly proportional to its (distance)2 from the centre

inversely proportional

✅ The correct answer is option B.

47. If the coefficient of discharge is 0.6, then the discharge over a right angled notch is

0.417 H5/2

1.417 H5/2

4.171 H5/2

7.141 H5/2

✅ The correct answer is option B.

48. A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because

it is easier to see through the glass tube

glass tube is cheaper than a metallic tube

it is not possible to conduct this experiment with any other tube

all of the above

✅ The correct answer is option A.

49. The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta)

2gH

H2g

2gH

✅ The correct answer is option D.

50. A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is

3.53 kN

33.3 kN

35.3 kN

none of these

✅ The correct answer is option C.