[Ammonia synthesis knowledge] Daily question (41) 2010.01.30
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Please hide the answer when replying to the post. If you do not hide it, you will not be graded in principle. Specific hiding methods: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 Multiple choice questions (multiple choices available) 1. What will improve the efficiency of the steam turbine cycle ( ). A. Increase the initial pressure of steam. B. Increase the initial temperature of steam. C. Reduce the initial pressure of steam. D. Reduce the final pressure of steam. 2. The mechanical efficiency of steam turbine is generally (). A 75%~80% B 80%~85% C 90%~95% D 97%~99% 3. The internal efficiency of steam turbine is generally ( ). A 70%~85% B 85%~90% C 90%~95% D 97%~99% The answer will be visible after replying: 1.ABD 2.D 3.A
1. What will improve the efficiency of the steam turbine cycle is (ABD). A. Increase the initial pressure of steam. B. Increase the initial temperature of steam. C. Reduce the initial pressure of steam. D. Reduce the final pressure of steam. 2. The mechanical efficiency of steam turbine is generally (D). A 75%~80% B 80%~85% C 90%~95% D 97%~99% 3. The internal efficiency of steam turbine is generally (A). A 70%~85% B 85%~90% C 90%~95% D 97%~99%
1.ABD 2.D 3.A 1# * aoye613
1.ABD 2.D 3.A
1.ABD 2.D 3.A
1.ABD 2.C 3.D
1.AB 2.B 3.C