Q1) Choose the correct answer. 1) If you decrease the discharge static head, what will happen to the flow? a. Static head and friction head b. It will decrease c. It will increase d. none 2) The moving part in centrifugal pump is a. impeller. b. diffuser. C. both a & b. d. neither a nor b.
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- A pipeline with a pump carrying a 50 L/s discharge leads to a nozzle as shown. If the 180 mm diameter pipe is made of cast iron while the 120 mm diameter pipe is made of commercial steel. Determine the head of the pump using the energy equation from pt. A to pt. C. The fluid is water with a kinematic viscosity of 1.02 x 10-6 m³/s. El. 20 m Water B 180-mm dia. pipe 200-m long pipe 300-m long pipe 120-mm dia. pipe El. 10 m El. 30 moll, s = 0.80 kerosene,s = 0.82 A manomoter is used to moasuro tho s = 0.0012 pressure of air in shown. Solve the pressure at point A given the following hoights: the pipe as Air = 0.35 m,h2 = 0.38 m, h, = 0.20 m, %3D h4 = 0.50 m, hs = 0.10 m, h6 = 0.30 m hz hy h3 ho Water Mercury MercuryThe steel pipe shown carries water from the main pipe A to the reservoir and is 2 inch in diameter and 240 ft long. What must be the pressure in A to provide a flow of 45 gpm? Clevation K00 t Water 7 50 F Open globe valve 90 bends (threaded)- Elevtion 20 fr 2 in galvanizcd pipe
- Choose the letter of the correct answer. Please answer honestly and do not just guess. | A pump that creating pressure difference between the intake and discharge point. a. Dynamic pump c. Displacement pump b. Pressure pump d. None of the above Maximum velocity happens at crank angle of 180°. a. True b. False JA pump must move a discharge of 1.1 cfs against a head of 30 ft. if the pump is driven J by a 5 kW motor with an efficiency of 75%, what is the brake horsepower? a. 5.025 hp c. 4.992 hp b. 4.83 hp d. None of the above 4 Which of the following is not correct? a. Pressure acts uniformly in all directions on a small volume of a c. When the fluid is static, pressure varies only with depth. fluid. In a fluid confined by solid boundaries, pressure acts perpendicular to the boundary. d. None of the above 5In the analysis of a fluid inside an accelerating container the assumption is that a. There is still no shear force acting on the fluid particle b. The hydrostatic equation can still…The ligure showWs a tank dischaPging through a pipe with a nozzle at Its end. Find the discharge and the pressure at the base of the nozzle. Losses are: Tank to the base of nozzle is 5(V/2g and through the nozzle is 0.05(Va)/2 (V, is the velocity in the pipe and Vi is the velocity at the tip of the nozzle) Water D= 150mm! D,= S0mmIn the figure, in +he water 0,1M -(2) Alow in the T-shapped pipe inthe horizental plane, の3m the flow velocityinthe Ist section 1s v, 4MIS, +he relative pressure is pi = 3 kg lkm? Find the X andy components of the force that the fluid acts on the T- pipe segmant, the ossiming Alow at fluid ideal if the 2nd cross Section Vz =4mls %3D
- 1. A pump station design fills a pressurized water tank by pumping water from a reservoir. The flow rate is 0.75 cfs. The pump is 10 feet above the reservoir, and the water tank is 100 ft above the pump. The pressure in the water tank is 10 psi. The suction and discharge lines are both (actual diameter) 6-inch Sch 40 steel (pipe roughness = 0.00015 ft). Use a kinematic viscosity of 1.21 x 10-5 ft²/s. Total pipe length is 200 ft. The suction line is 10 ft. You must account for friction loss, but you can neglect the minor losses. a. What is the head added by the pump in ft? b. What is the power added by the pump in HP (recall 1 HP = 550 ft*lb/s)? 110 ft 10 ft 0 ftuservoir discharges into a 55-inch pipe that discharges freely, as shown below. What is the pressure in the pipe at point A? Consider friction. Use f =0.02 Elev 155 ft Inv. @ A 134.2 ft 55 in 140 ft Inv. 120 ft 420 ft 900 ft 1450 ft a. 502 psf b. 502 psi c. 457 psf d. 457 psi e. 36 ft ,what is the velocity at point B? a. 17.5 fps b. 36 fps c. 3.6 fps d. 4.57 fps e. 50.2 fps arGasoline flows steadily downward through the pipe shown in the figure below. Viscous effects are negligible, and the pressure gage indicates the pressure is zero at point (1). Determine (a) the flowrate and (b) the pressure at point (2). (a) Q = (b) p2 = 2.1ft 3.1ft •(1) ↓² -0.12 ft -0.1 ft -free jet ft³/s lb/ft²
- 380 Q-24: A pipe of diameter d and length L leads from a reservoir. At the discharge end a nozzle of diameter d is fitted. At the inlet of pipe head available is H. The nozzle is discharging into atmosphere. Prove that for maximum power transmitted by the nozzle dn d5 2fL Head loss in pipe is given by h, = fLV 2gd where f = Darcy's friction factor.A centrifugal water pump has an impeller with r2=12_ in., r1= 4 in., ẞ1 =20°, and B2 impeller is 2 in. wide at r1 and 0.75 in. at r2. For 1800 rpm, determine (a) the discharge for a1-90, (b) a2 and H, (c) the power required P, and (d) the pressure rise through the impeller. = 10⁰. Theheight of water the pressure intensity : () at the interface of the two liquids, and (ii) at the bottom of the tank. [Ans. () 1.57 N/cm", (il) 3.04 N/em 6. An open tank contains water upto a depth of 1.5 m and above it an oil of sp. gr. 0.8 for a depth of 2 m. Find 7. The diameters of a small piston and a large piston of a hydraulic jack are 2 cm and 10 cm respectively, A force of 60 N is applied on the small piston. Find the load lifted by the large piston, when: (a) the piston at the same level, and (b) small piston is 20 cm above the large piston. The density of the liquid in the jackis [Ans. (a) 1500 N, (b) 1520.5 NJ kg given as 1000 - 8. Determine the gauge and absolute pressure at a point which is 2.0 m below the free surface of water. Take [Ans. 1.962 N/cm? (gauge), 12.066 N/cm? (abs.)] - atmospheric pressure as 10.1043 N/cm?. 9. A simple manometer is used to measure the pressure of oil (sp. gr, = 0.8) flowing in a pipe line. Its right limb is open to the atmosphere and left…