Southern Alberta Institute of TechnologyAMEC 2 356problem5 ( 100% CORRECT SOLUTIONS AND ANSWERS )

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Applied Mechanics II SAIT AMEC 356 Practice Problem 5: 1. Convert a volume flow rate of 3.0 gal/min to m3/s. 1:89 × 10−4m3=s 2. Convert 15 000 L/min to m3/s. 0:250 m3=s 3. Convert 8720 gal/min... to L/min. 3:30 × 104 L=min 4. Water at 10°C is flowing at 0.075 m3/s. Calculate the weight flow rate and the mass flow rate. W = 736 N=s; M = 75:0 kg=s 5. A liquid refrigerant (sg = 1.08) is flowing at a weight flow rate of 28.5 N/h. Calculate the volume flow rate and the mass flow rate. Q = 7:47 × 10−7 m3=s; M = 8:07 × 10−4 kg=s 6. When 2000 L/min of water flows through a circular section with an inside diameter of 300 mm that later reduces to a 150 mm diameter, calculate the average velocity of flow in each section. υ1 = 0:472 m=s; υ2 = 1:89 m=s 7. Water flows at 1.20 m/s in a circular section with a 150 mm inside diameter. Calculate the velocity of flow in a 300 mm diameter section connected to it. υ2 = 0:300 m=s 8. Figure 5.1(A) shows a fabricated assembly made from three different sizes of standard steel tubing (see Table G). The larger tube on the left carries 0.072 m3/s of water. The tee branches into two smaller sections. If the velocity in the 50 mm tube is 12.0 m/s , what is the velocity in the 100 mm tube? υ3 = 7:534 m=s 9. The volume flow rate for centrifugal fire-fighting pumps is in the range of 1800 L/min to 9500 L/min. Specify the smallest suitable DN size of Schedule 40 steel pipe for each flow rate that will maintain the maximum velocity of flow at 2.0 m/s. A1 = 1:864 × 10−2 m2, A2 = 8:729 × 10−2 m2 10. A venturi meter is a device that uses a constriction in a flow system to measure the velocity of of flow. Figure 5.1(B) illustrates one type of design. If the main pipe section is a standard hydraulic copper tube having a 100 mm outside diameter×3.5 mm wall thickness, compute the volume flow rate when the velocity there is 3.0 m/s. Then, for that volume flow rate, specify the required size of the throat section that would make the velocity there at least 15.0 m/s. (see Table G). Dt = 41:6 mm 11. If pipe 1 diameter is 50 mm, mean velocity 2 m/s, pipe 2 diameter 40 mm takes 30% of total discharge and pipe 3 diameter 60 mm. What are the values of discharge and mean velocity in each pipe? Q1 = 0:00392 m3=s; Q2 = 0:001178 m3=s; Q3 = 0:00275 m3=s, υ2 = 0:9365 m/s; υ3 = 0:972 m/s. [Show More]

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