main stem stop valve
auxiliary steam stop valve
feed check or control valve
blow down valve
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：
Valves on steam-smothering lines to cargo tanks shall be set with ______．
A.The master control valve shut and valves to individual cargo tanks shut
B.The master control valve open and valves to individual cargo tanks shut
C.The master control valve shut and valves to individual cargo tanks open
D.All valves open
第3题：
The deck control valve to be ______ after being repaired.
A.returned and attached again
B.moved and fitted again
C.removed and refitted
D.reproduced and put on again
第4题：
moved and fitted again
removed and refitted
reproduced and put on again
returned and attached again
第5题：
cold fuel oil
low fuel oil pressure
low atomizing steam pressure
water in the fuel oil
第6题：
A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a flame ______.
A.stopper
B.screen
C.filter
D.restrictor
第7题：
If the hatch cover does not move, （）should be checked.
第8题：
The fuel oil supply system to an automatic auxiliary boiler, will automatically shutdown if the boiler ______.
A.steam demand is high
B.salinity is high
C.safety valve simmers(爆发)
D.burner flame is extinguished
第9题：
flame stopper
flame screen
flame filter
flame restrictor
第10题：
main stem stop valve
auxiliary steam stop valve
feed check or control valve
blow down valve