海船船员考试
单选题The main bearings are provided with thin-walled （）, lined with a copper-lead alloy.A steel guidesB steel shellsC steel bearing capsD pig iron
题目
steel guides
steel shells
steel bearing caps
pig iron
相似问题和答案
第1题：
one automatic drain serving both containers
two air starting containers of approximately equal size
one control air container and one starting air container
one additional means of starting the main engine
第2题：
The advantages of WAP.
The improvement of communications devices.
Services provided by the Internet.
The development of computers.
文章仅从第三段开始就谈到WAP具备最优的通讯设备所应具备的小巧和多功能的特性，因此A的意思不全面。C意为“互联网提供的服务”，D意为“计算机的发展”，也都不是文章的主要思想。
第3题：
Vessels having main engines arranged for air starting are to be provided with at least__.
A.one automatic drain serving both containers
B.two air starting containers of approximately equal size
C.one control air container and one starting air container
D.one additional means of starting the main engine
第4题：
are lined with
is lined with
have lined with
句意：让我们吃惊的是，新书店的墙上排满了书。本题考查固定短语“be lined with”，意为“排列着；镶有”。可排除C、D项。句子主语是“walls”，为复数形式。而be动词应与之保持性、数一致，使用are。故B项正确。
第5题：
dependent
in dependent
in series
in parallel
第6题：
Prevents lateral movement of the slow speed gear
Transmits propeller thrust to the hull
Keeps spring bearings in line
Prevents main reduction gear axial movement
第7题：
line shaft bearings
connecting rod beatings
main bearings
support bearings
第8题：
Stern tube and strut(支柱) bearings lined with hardwood or rubber composition materials are lubricated with______.
A.saltwater
B.graphite(石墨)
C.light lubricating oil
D.heavy lubricating oil
第9题：
banjo feed
splash feed
gravity feed
pressure feed
第10题：
axial loads
firing loads
inertia loads
centripetal loads