Ability to identify how high and wide a doorway and an aisle must be to drive the fork lift truck and its load; how high and wide the shelf, bin, etc., must be to place the load; and how high the load must be lifted to reach the shelf or bin. Must be skilled in handling controls for starting, stopping, backings, and driving fork lift trucks through narrow aisles in building, up and down ramps, and in and out of railroad cars, trucks, etc.