20114 Q1:( ) A. Chief engineer. B. Second engineer. C. Third engineer. D. Fourth engineer. Q2:( ) A. Charging air pressure of main engine is too high. B. Charging air temperature of main engine is too low. C. Charging air pressure of main engine is too low. D. Charging air temperature of main engine is too high. Q3:( ) A. The load of the main engine isn't changed. B. The lead of the main engine is changed. C. The load of the auxiliary engine is changed. D. The load of the main engine is increased. Q4:( ) A. Filters of compressor are dirty. B. Blades of compressor are dirty. C. Filters and blades of compressor are dirty. D. Filters or blades of compressor are dirty.