Engine: Motor Plants and Auxiliary Boilers

1. A Rotor "1" turns clockwise, and rotor "2" turns counterclockwise. Area "3" is the suction passage, and area "4" is the discharge passage.
2. B Rotor "1" turns clockwise, and rotor "2" turns counterclockwise. Area "3" is the discharge passage, and area "4" is the suction passage.
3. C Rotor "1" turns counterclockwise, and rotor "2" turns clockwise. Area "3" is the discharge passage, and area "4" is the suction passage.
4. D Rotor "1" turns counterclockwise, and rotor "2" turns clockwise. Area "3" is the suction passage, and area "4" is the discharge passage.

Tip: press A-D to answer