Question 41. The resistance wire used in a hot wire anemometer for conducting electrical current is made of

Question 42. Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the __________ head.

Question 43. Which of the following is used for very accurate measurement of flow of gas at low velocity?

Question 44. The Mach number for hypersonic flow of compressible fluid is

Question 45. For laminar flow through a closed conduit

Question 46. Shear stress in a fluid flowing in a round pipe

Question 47. Select the wrong statement pertaining to flow of an incompressible fluid through a venturimeter.

Question 48. A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system (in SI units) is given below :Δ P/L = 375 x 10³ VOM + 10.94 x 10⁶ V²OM (SI units)If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is

Question 49. Two fluids are flowing through two similar pipes of the same diameter. The Reynold's number is same. For the same flow rate if the viscosity of a fluid is reduced to half the value of the first fluid, the pressure drop will

Question 50. A venturimeter can not be used for the direct measurement of