海船船员考试
单选题Air or noncondensable gas is removed from a refrigeration system by a （）A separating chamberB system of bafflesC purge valveD vacuum reducing valve
题目
separating chamber
system of baffles
purge valve
vacuum reducing valve
相似问题和答案
第1题：
Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by
A.natural aspiration
B.masked intake valves
C.air ceils
D.scavenging air
第2题：
The fresh air intake of the inert gas system ______，
A.Prevents the flue gas from falling below 3% content of oxygen
B.Allows the inert gas piping to be used for gas freeing the tanks
C.Opens when there is excessive vacuum on the deck water seal
D.Enables outside air to mix with and cool hot flue gasses
第3题：
Any open flame can’t exist in this business building
A.Yes. We’ve removed all the flammable gas.
B.Yes. We’ve searched everywhere for flammable liquid
C.Yes. All the flammable liquid and gas have been removed already.
D.Yes. We’ve removed all the liquid, gas and wood which can be burned
第4题：
De-energizes the charged mist effect
Maintains a positive pressure on the vent header to cool the flammable vapors
Inert gas filters out the flammable vapors from the cargo tank spaces
Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit
第5题：
natural aspiration
masked intake valves
air cells
scavenging air
第6题：
In an air conditioning system, moisture is removed from the air by ______.
A.filters
B.separators
C.ducted traps
D.dehumidifiers
第7题：
Gas masks ______.
A.should be worn while fighting a fire
B.can be used in atmospheres deficient in oxygen
C.filter contaminants from air that is to be breathed
D.may be substituted for a self-contained breathing apparatus
气体面具过滤用于呼吸的空气中的污染物。
第8题：
Moisture is removed from a refrigeration system by
A.bleeding refrigerant from the condenser
B.opening a drain petcock on the oil separator
C.condensing the water in the heat exchanger
D.using a dehydrator cartridge
第9题：
starting air bottles
diesel engines
boilers
refrigeration compressors
第10题：
sudden evaporation of wax crystals in the lubricant
sudden evaporation of entrapped air in the lubricant
release of refrigerant from the oil/refrigerant mixture
release of dissolved lubricant from the refrigerant