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The nozzle of a ventilation duct is placed 9.5 m above the floor of the hydraulic laboratory and it is directed vertically downward.
The outlet discharges 2,300 m3/hour.
(a) For a circular duct, calculate the diameter of the nozzle if the maximum permissible velocity at a height of 1.5 m above the floor is 0.95 m/s?
(b) An alternative design uses a wide rectangular duct (10 m long), calculate the opening of the nozzle if the maximum permissible velocity at a height of 1.5 m above the floor is (b1) 0.95 m/s and (b2) 0.50 m/s? Discuss your results.
Assume a quasi-two-dimensional flow pattern.
The fluid is air at 28 Celsius and standard pressure.
A force of 100 000 N is applied to a 10 mm x 20 mm rectangular cross-section iron bar in tension. If the iron has a yield strength of 400 MPa and a tensile strength of 480 MPa, determine: whether the bar will plastically deform
If the energy loss in the contraction is equal to \(V_1^{2}/2g\) where V1 is the average velocity upstream of the contraction, what is the depth of flow in the constriction. A lined rectangular concrete drainage channel is 10m wide and carries a..
a railway wagon weighing 40 kn and moving with a speed of 8 kmh is stopped by a buffer of 4 springs whose allowable
How many 34-inch diameter rivets are required to transmit 55,000 lb from the two angles to the gusset plate if the allowable shear stress in the rivets is 15,000 psi. Assume each rivet carries the same amount of load.
a pipeline terminates in a nozzle of outlet diameter 0.15 m. the free jet from the nozzle is deflected through
If the coordinate direction angles for F3 are a=120degrees, b=45degrees, y=60degrees, determine the magnitude and coordinate direction angles of the resultant force acting on the eyebolt.
Wet steam at a pressure of 1382 kPa and a quality of 99% is throttled to a pressure of 689.5 kPA. Find the temperature after throttling.
How far from your eye would you need to hold a dimeto just barely cover the Moon? (Does the with of your thumbcover the moon if you hold your arm out straight? The moon is nextfull on Sept 18, but a partial moon is enough to judge thediameter.)
The initial piezometric head in a confined aquifer has a thickness of 11.6 m is 85.7 m above sea level. A well with a radius of 0.5 m pumps at a constant rate of 1240 m3/day. After the cone of depression has achieved equilibrium, the piezometric head..
It has been decided to use an approximate grid of 3.75metres by 6.75 metres for an office building, which is to includefacilities for general filing and storage space.
Water flows through a 75 mm constriction in a horizontal 150 mm pipe. If the pressure in the 150 mm section is 345 kPa and that in the constriction 207 kPa, calculate the velocity in the constriction and the flowrate.
A permanent endowment at the University of Alabama is to award scholarships to engineering students. The awards are to be made beginning 5 years after the $10 million lump-sum donation is made.
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