8.2 Sand Flow — The rate of sand flow shall be 300 to 400 g/min (0.66 to 0.88 lb/min).
8.3 Time—The time of the test will be about 30 min for Procedures A and D, 10 min for Procedure B, 5 min for Procedure E, and 30 s for Procedure C, depending upon the actual wheel speed. In all cases the number of wheel revolutions and not the time shall be the controlling parameter.