【Learn Ethylene Together】Five questions per day to easily learn about ethylene 27

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【Learn Ethylene Together】Five questions per day to easily learn about ethylene. Question 27: Multiple choice. 1. Turbines can be classified according to their exhaust methods. （ ）a、Back-pressure turbine b、Suction-condensing turbine c、Fully condensed turbine d、Atmospheric-pressure turbine 2、There are types of labyrinth seals commonly used ( )a、Straight-type b、Twisted-type c、Stepped-type d、Honeycomb-type 3、For the demethanization tower, its key component is . ( ) a、H2 b、Methane c、Ethylene d、CO 4. There are ways to monitor compression surge: ( ) a、Derivative of speed b、Derivative of pressure c、Derivative of flow rate d、Derivative of temperature e、Absolute flow rate f、Mass flow rate 5. The control system of a steam turbine includes . ( ) a. Steam extraction control b. Electronic high-speed system c. Condenser control system d. Steam inlet pressure control 1. Turbines can be classified according to different exhaust methods. (a, b, c) a. Back-pressure turbine b. Extraction-condensing turbine c. Fully condensed turbine d. Atmospheric-pressure turbine. 2. The common types of labyrinth seals are (a, b, c, d) a. Straight-type b. Twisted-type c. Stepped-type d. Honeycomb-type. 3. For a demethanization tower, its key component is . (b, c) a. H2 b. Methane c. Ethylene d. CO 4. The methods for monitoring compression surge include: (a, b, c, d, e) a. Derivative of speed b. Derivative of pressure c. Derivative of flow rate d. Derivative of temperature e. Absolute flow rate f. Mass flow rate 5. The control system of a steam turbine includes . (a, b, c) a. Extraction steam volume control b. Electronic high-speed system c. Condenser control system d. Steam inlet pressure control