a production fixture for machining cylinder heads uses pins to locate the head for prcise machining. the head is manually instlled on and removed from the pins. the type of fit used between the pin on the fixture and the cylinder head locating the holes should be?

Asolid cylinder is concentric with a straight pipe. the cylinder is 0.5 m long and has an outside diameter of 8 cm. the pipe has an inside diameter of 8.5 cm. the annulus between the cylinder ad the pipe contains stationary oil. the oil has a specific gravity of 0.92 and a kinematic viscosity of 5.57 x 10-4 m2/s. most nearly, what is the force needed to move the cylinder along the pipe at a constant velocity of 1 m/s?