首 页
大学试题
CMS专题
工学
经济学
专升本
法学
教育学
历史学
更多分类
搜索
题库考试答案搜索网 > 题目详情
当前位置:
首页
>
简单管道末端阀门突然关闭水击传播过程中,第一阶段的运动特征为():
>
题目详情
问题题干
答案解析
相关问题
热门问题
最新问题
问题详情
简单管道末端阀门突然关闭水击传播过程中,第一阶段的运动特征为():
A、减速减压
B、增速增压
C、减速增压
D、增速增压。
时间:2021-09-01 23:49
关键词:
青书学堂
西南石油大学
工程流体力学(高起专)
答案解析
C
相关问题
boost的意思是:help or encourage to increase or improve
eloquent的意思是:fluent or persuasive in speaking or writing
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
水在锅炉管道内流动,因速度突然发生变化导致压力突然变化,形成压力波在管道内传播的现象叫水击。水击现象常发生在给水管道、省煤器、过热器、锅筒等部位,会造成管道、法兰、阀门等的损坏。下列关于预防水击事故的措施中,正确的是( )。
突然完全关闭管道末端的阀门,产生直接水击。已知水击波速c=1000m/s,水击压强水头H = 250m,则管道中原来的流速v0为 ()
最新问题
突然完全关闭管道末端的阀门,产生直接水击。已知水击波速c=1000m/s,水击压强水头H = 250m,则管道中原来的流速v0为( )
当阀门关闭时间t大于水击相长时,这种水击称为( )。
简单管道末端阀门突然关闭水击传播过程中,第一阶段的运动特征为():
Mainly east 3 or 4 partly cloudy to overcast occasional rain()slowly south moderate or good.
()any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local quarantine officer must be notified immediately.
Should any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local Quarantine Officer must be()immediately.
Masters are()solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.
系统中雷达状态包括Unknown、Operational(or ON)、Failed(or OFF)、Detached。
Owners are to be responsible for loss of or damage to the goods or delay in delivery of the goods only in case the loss,damage or delay has been caused by the improper or negligent stowage of the goods.This means that().
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire,()the claimant proves that the fire arose from fault or neglect on the part of the carrier,his servants or agents.
别人在看