p=4fDLe2GV2, where, Le= equivalent length of straigli pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of DLe (dimensionless) for 45 elbow and 180 close return bends would be respectively around (a) 5 and 10 . (b) 45 and 75 (c) 180 and 300 (d) 300 and 500 41. DL8 for 90 elbow (medium radius) and 90 square elbow wold be respectively around (a) 25 and 60 (b) 3 and 5 (c) 100 and 250 (d) 250 and 600 42. DLC for a Tee (used as elbow, entering run) would be around (a) 5 (b) 60 (c) 200 (d) 350