34.C.F.S. is the abbreviation for . (A)Control Flying School (B)Cubic Feet per Second (C)Cargo Forwarding Station (D)Container Freight Station

38.How should you signal the crane operator to LOWER the boom？ (A)With arm extended and fingers closed, point thumb downward. (B)With arm extended downwards and forefinger pointing down, move hand in small horizontal circles. (C)Extend arm with the palm, and hold this position rigidly. (D)With hands clasped in front of your body.