海船船员考试
单选题Foaming in the steam drum may be caused by （） in a boiler.A oxygen in the waterB poor boiler designC density too highD excessive steam demand
题目
oxygen in the water
poor boiler design
density too high
excessive steam demand
参考答案和解析
相似问题和答案
第1题：
If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler, the cause may be ______.
A.high steam pressure in the boiler
B.abnormally high feed-water temperature
C.abnormally high boiler water temperature
D.steam demand exceeding feed pump capacity
第2题：
A system administrator thinks that a filesystem may be full and that is what caused the machine to crash. Which command will show the administrator if they are correct?（）
- A、 du
- B、 df
- C、 fsck
- D、 ncheck
正确答案:B
第3题：
A. pain
B. personal habits
C. muscle imbalance
D. degenerative process
第4题：
closed discharge valve
broken pipe line
worn shaft
both A and B
第5题：
Receives saturated steam from the generating tubes
Serves as a reservoir of boiler feed water
Holds internal fittings for separation of moisture from steam
Collects steam exhausted from the turbines
第6题：
A. plastic drum； gunny bag； wooden case B. wooden case； plastic drum； gunny bag
C. wooden case； gunny bag； plastic drum D. plastic drum; wooden case； gunny bag
第7题：
the lantern panes of unattended lights may not become covered with ice or snow
the lantern panes of unattended lights may become covered with ice or snow
ice or snow is likely caused colored
the white lights are likely caused to appear colored
第8题：
The water level showing in a boiler water gauge glass is usually ( ) duringworking.
A.higher than the actual drum water level
B.equal to the actual drum water level
C.increasing due to steam condensation in the glass
D.lower than actual drum wafer level
解析：水位表上端通汽下端通水，温度不及炉内的高;炉内的炉水是水和汽泡的混合物，故其水位要高些。
译文：锅炉运行期间，水位计显示的水位比炉内的实际水位低。
第9题：
rise quickly
rise slowly
drop quickly
drop slowly
第10题：
punt used for painting over the side
small, reciprocating steam engine
spool-shaped drum fitted on a winch
swinging derrick