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1. |
Apart from alloying, name a material that is used instead of ferritic steels to increase the ultimate strength of unalloyed steels. |
A. | Chromium |
B. | Molybdenum |
C. | " Austenitic steelb) None of the mentionedView AnswerAnswer: cExplanation: The use of Austenitic steels increases the ultimate strength of unalloyed steels at high temperatures. The temperature limits are in the range 538-565 degree Centigrade.9. Which of these cases will have a higher cycle efficiency?a) Condenser Pressure= 25 mm of Hg; C |
D. | Condenser Pressure= 100 mm of Hg; Cooling Water Temperature= 45 degree Centigrade |
Answer» B. Molybdenum | |