Calculate the discharge over rectangular Weir of 3 metres length under the head of 400mm.Use Francis formula.

Related MCQs

• Compute the maximum deflection at free end of a cantilever beam subjected to udl for entire span of l metres.
•                    is a graph showing variations of discharge with time.
• Calculate the torque which a shaft of 300 mm diameter can safely transmit, if the shear stress is 48 N / mm2.
• Calculate the radioactive minority carrier lifetime in gallium arsenide when the minority carriers are electrons injected into a p-type semiconductor region which has a hole concentration of 1018cm-3. The recombination coefficient for gallium arsenide is 7.21*10-10cm3s-1.
• A GaAs injection laser with an optical cavity has refractive index of 3.6. Calculate the reflectivity for normal incidence of the plane wave on the GaAs-air interface.
• Calculate the numerical aperture of an optical fibre whose core and cladding are made of materials of refractive index 1.6 and
• A step-index fibre has a numerical aperture of 0.26, a core refractive index of 1.5 and a core diameter of 100micrometer. Calculate the acceptance angle.
• The sun emits maximum radiation of 0.52 micron meter. Assuming the sun to be a black body, Calculate the emissive ability of the sun’s surface at that temperature
• A furnace emits radiation at 2000 K. Treating it as a black body radiation, calculate the monochromatic radiant flux density at 1 micron m wavelength
• A metal sphere of surface area 0.0225 m2 is in an evacuated enclosure whose walls are held at a very low temperature. Electric current is passed through resistors embedded in the sphere causing electrical energy to be dissipated at the rate of 75 W. If the sphere surfaces temperature is measured to be 560 K, while in steady state, calculate emissivity of the sphere surface