Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
define the net positive suction head all values in the equations are in units of feet note only use values related to the suction side of the
primary effluent wastewater at 60of v 1217 x 10-5 is pumped to the top of a trickling filter tf a total of 75 vertical feet through schedule-40
steps to determine the brake bhp and motor horsepower mhp 1 determine water horsepower whpha qgpm sg 3956 or ha qcfs sg 88142 apply the pump
explain brake and electrical horsepowerbrake horsepower bhp whppump efficiencyelectrical or motor horsepower ehp or mhp bhpmotor efficiencyfriction
define the pump and motor efficienciesequations account for the loss of power primarily due to mechanical friction as a result of rotating components
steps to determine the hydraulic horsepower whp for pump problems 1 determine ha by rearranging the bernoulli equation 2 apply ha into the
explain the critical depthdc is the depth of flow in an open channel that has the lowest energy in rectangular open channels dc3 q2gw2in
explain subcritical flow and supercritical flowsubcritical flow the depth of flow is greater than critical depth and the velocity of the fluid is
explain the critical flowcritical flow occurs where the flow depth is at the critical depth one location in an open channel is where the flow is
what is froude numberused to determine if the flow is rapid critical or tranquil fr 1 critical flow fr lt 1 subcritical flow fr gt 1
define the alternate depthsin open channels two alternate depths of flow have the same energy for the same flow rate as shown in the figure the
define the equations for a contracted rectangular weirif the rectangular weir is a contracted weir and the flow is restricted from passing freely
explain the equation for a suppressed rectangular weir if the approach velocity is negligible velocity head can be excluded and the equation becomes
explain the suppressed rectangular weirif the length of the weir b equals the width of the channel ie the flow is not
explain the contracted rectangular weirweir plate has sides which extend above the maximum water surface directing the flow through an opening b
define the rectangular weirssometimes referred to as sharp crested weirs if the top edge of the weir plate is
define the approach velocitytypical problems have negligible approach velocity v1 qa where a the cross-sectional area of flow in the channel
explain flow measurement with weirs fixed plates positioned vertically in an open channel over which flow is directed through an opening the opening
explain the normal depth equation the equation is derived from the chezy-manning equation as written below it determines the diameter of a circular
define circular channels flowing partially fulltwo sets of curved lines on the circular channel ratios figure discharge qqfull and velocity
determine the head loss due to friction using the darcy-weisbach equation the water is pumped at 30 gallons per minute has a temperature of 60 degf
minor losses using th method of loss coefficientsone method of calculating the energy loss as a result of fluid flowing through a device or fitting
determine the flow velocity in 2000 ft of 8 inch diameter piping flowing full the energy lost in piping is 54 ft use nominal pipe diameter and c
determine the loss of fluid energy as 310 gallons per minute gpm of water flows through 1000 ft of 4 inch schedule-40 welded and seamless steel pipe
determine the total head and total pressure of water flowing at in a pipe which has the following dataflow 2500 gpm elevation 30 ft pressure 40