A 90 deg V-notch and a rectangular weir are placed in series. The length of the rectangular weir is 0.6 m and its coefficient is 1.81. If the coefficient of contraction of the V-notch is 0.61, what will be the working head when the head on the weir is 0.15 m?

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented

Apressure vessel with an r/t 20 cannot be treated as thin walled vessel. a)-trune b)- false

Air enters a horizontal, constant-diameter heating duct operating at steady state at 290 k, 1 bar, with a volumetric flow rate of 0.25 m°/s, and exits at 325 k, 0.95 bar. the flow area is 0.04 m2. assuming the ideal gas model with k = 1.4 for the air, determine (a) the velocity at the inlet and exit, each in m/s, and (c) the rate of heat transfer, in kw flow rate, in kg/s, (b) the mass kg 0.3