Mechanical Equipment [Daily Question] Thursday, December 01, 2011

Thread Content

This post was last edited by zhiyuan1100 on 2011-12-6 at 19:43. Please hide your replies; editing after posting is invalid! Those with different views on the provided answer keys can post discussions the next day. For responses from multiple accounts under the same IP, only the first one is considered valid. This is a true or false question. A full correct answer earns 5 points, 3 points for each correctly answered question, and 2 points for the rest. Everyone who participates will receive a reward. Please hide your reply; the method for hiding it is: http://bbs.hcbbs.com/thread-492556-1-1.html 1. The liquid in the storage tank enters the centrifugal pump through ( ). A. The centrifugal force generated by the impeller ； B. The liquid level pressure in the tank and the pressure difference within the pump ； C. Siphon ； D. Unable to determine. 2. The main reason for the low efficiency of thermal power plants is ( ). A. Low boiler efficiency ； B、Heat loss from turbine exhaust ； C. Generator losses ； D. Mechanical losses of the turbine Answer: B B