Gravity siphon effect
Higher vacuum in the second-stage
Difference in brine density between first and second stages
lower pressure in first-stage
第1题：
Which of the listed conditions can be considered as the single greatest cause of accidents?
A.Speed
B.Excessive knowledge or skill
C.Human error
D.Excitement
第2题：
concentrations of calcium sulfate in the boiler water
fuel oil in the feed water
improper treatment of the feed water with calcium sulfate
excessive feed water alkalinity
第3题：
Of all the extingushing agents listed below, which one has the greatest capacity for heat absorption?______.
A.Water fog
B.Carbon dioxide
C.Dry chemical
D.Solid stream of water
第4题：
Dirty lube oil filter
Too much piston ring wear
High lube oil viscosity
Low lube oil temperature
第5题：
vaporize, with the un-flashed water remaining at the temperature at which it entered the flash chamber
vaporize, with the un-flashed eater equalizing to the saturation conditions existing in the f lash chamber
vaporize, with the remaining water a t a temperature greater than it entered the flash chamber
boil, allowing steam bubbles to rise through the brine at the bottom of the flash chamber
第6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7题：
Shortage of refrigerant oil
Slight shortage of refrigerant
Excessive condenser cooling water flow
Faulty expansion valve
第8题：
Which of the conditions listed will cause a refrigeration compressor to run constantly without simultaneously decreasing the temperature in the refrigerated space?( )
A.Shortage of refrigerant oil
B.Slight shortage of refrigerant
C.Excessive condenser cooling water flow
D.Faulty expansion valve
第9题：
Hydrochloric acid
Chlorine
Sulfuric acid
Zinc chromate
第10题：
Internally finned liner
Externally finned liner
Wet liner
Integral water-jacket liner