【单选题】If fuel oil were being discharged from the waster outlet of a fuel oil disk type centrifuge, operated as separator, you should___________.
A.
remove the discharge ring
C.
the centrifuge to its proper speed
D.
install an additional discharge ring
【单选题】The fuel oil system for a diesel engine can be considered in two parts_____ and _____ systems.
A.
fuel supply, fuel injection
B.
fuel supply, fuel consumption
C.
fuel consumption, fuel injection
D.
fuel consumption, fuel atomisation
【简答题】请认真学习课程内容后在A4纸张(或信纸)上手写回答以下问题(可不必抄写题干),拍照上传到学习通本课程 2.27作业2 中。 1.请根据如下地籍调查表,如果基于表设计数据库表那么会涉及几个实体?请绘制出ER模型图。 (50分) 2.假设要建立一个企业数据库,该企业有多个下属单位,每一个单位有多个职工,一个职工仅隶属于一个单位,且一个职工仅在一个工程中工作,但一个工程中有很多职工参加工作,有多个供...
【单选题】A dirty fuel oil filter is can be detected by ________Ⅰ.fuel oil analysis Ⅱ.observing the pressure drop across the filter
【简答题】如图为某化学反应的微观模拟示意图:“ ”表示氮原子,“ ”表示氢原子.请你根据图示回答下列问题: (1)写出化学式:A______;C______. (2)A、B、C三种物质中属于化合物的是______; (3)该反应的基本类型是______反应.
【单选题】Machinery driving fuel oil transfer and fuel oil service pumps must be fitted with a remote means of stopping the machinery from _____.
A.
within the space concerned
B.
outside the space concerned