In a vacuum distillation system, the case is the higher the pressure, （）.
A . the saturation temperature is higher
B . the higher the saturation temperature
C . the higher is the saturation temperature
D . the saturation temperature is more high
相似题目
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In the two stage flash distilling plant, which of the pumps listed is vented to the shell of the second stage in order to remove vapor from the pump suction?（）
A . Condenser circulating water pump
B . Feed-water heater drain pump
C . Distillate pump
D . Air ejector condenser drain pum
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The crankcase of many diesel engines are kept under a slight vacuum by the （）.
A . scavenging action of the piston
B . piston type vacuum pump taking suction off a differential manometer
C . gland exhausting manometer
D . crankcase exhaust fa
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The vacuum maintained in the salt water feed heater shell of a flash-type evaporator is generally accomplished by （）.
A . a separate air ejector unit
B . a direct unimpeded connection between second stage and salt water feed heater
C . either by vacuum drag or an external line from the first stage via a fixed orifice
D . the fixed orifice provided in the steam supply line
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In a storm，the leeward lines of a ship’s mooring system will（）.
A . pull the unit in the same direction that the weather is pushing it
B . pull the unit in the opposite direction that the weather is pushing it
C . tend to keep the unit on its original location over the well head
D . affect the unit's draft and inclination as maximum mooring tensions are reached
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A vacuum is initially established in the first and second stages of a low pressure evaporator by the use of （）
A . vacuum drag from the auxiliary condensate system
B . individual vacuum pumps
C . a single non-condensing air ejector
D . a two stage air ejector
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Distilled water from an evaporator may be discharged into a potable water tank （）.
A . through a detachable hose connection
B . after passing through an activated charcoal filter
C . after chemical analysis shows it is fit for consumption
D . through a solenoid operated three-way valve
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Diesel engine jacket water is used in the distillation process as the （）.
A . coolant for the distillate
B . coolant for the brine cooler
C . means of heating the feedwater
D . primary means of producing a vacuum within the distiller
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Excessive scale formation in a distilling plant may result from （）.
A . poor distillate quality
B . reduced evaporator capacity
C . low brine concentration
D . improper vacuum regulatio
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In a storm，the windward lines of a ship’s mooring system provide（）.
A . a positive righting moment
B . an increase in KM
C . a negative restoring force
D . a positive restoring force
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With a vacuum boiling evaporator, the remainder of sea water fed to the evaporator is pumped out by （）.
A . a brine pump
B . an air ejector
C . a feed pump
D . distillate pum
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In a vacuum boiling evaporator, the fresh water generated is pumped out by （）.
A . a brine pump
B . an air ejector
C . a feed water pump
D . a condensate pum
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Because of the reduced （） in the vacuum boiling evaporator, some of the sea water boils as it flows through the tubes.
A . temperature
B . water level
C . pressure
D . rate of flow
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Why will a two stage flash type distilling plant tend to operate more efficiently when operating in cold seawater?（）
A . The colder seawater passing through the condenser tube bundles of the various stages increases evaporator vacuum
B . The amount of heated feed water discharged from the feed water heater after cndenser is increased
C . Fewer non-condensable gases are created by the flow of colder seawater
D . More seawater is allowed to pass through the flint stage overflow weir
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He is studying for a master’s degree in marketing.
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How many items are there in a man’s bathroom and a woman’s bathroom respectively?
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In A Lesson in Living, Mrs. Flowers understood Marguerite’s feelings better than Momma did.
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In “Ticket, Please”, What does Annie’s act on John’s back in a reversal of the traditional position suggest?
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What is NOT a major conflict in Bharati Mukherjee’s “A Father”?
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If a person wants to be successful in business in Russia, it’s probably not a good idea to
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CHD is a condition in which the heart’s arteries （）
A．冠心病是指心脏动脉血管变窄，使得流向心肌的血量减少，而且还可能导致动脉血管的完全阻塞。
B．冠心病产生的条件是动脉血管变窄，从而减少流向心脏的血液，造成动脉的堵塞。
C．冠心病是由动脉血管的阻塞引起的，这会减少流向心肌的血液，从而导致血管变窄。
D．冠心病由于导致了动脉血管的完全阻塞，从而减少了流向心脏的血液，这使得血管变窄。
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“What’S in your hand？”-“It is a bill．”
A.two．thousand dollar
B.two-thousand dollars
C.two．thousand．doHar
D.two-thousand-dollars
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As a s__worker,she does a lot of work in slums
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"A snake in one' s bosom" means（）.
A、hidden danger
B、bad idea
C、seduce sb with money
D、reward help with harm
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7、以下程序的输出结果是（）。 for i in range（3): for s in 'xyzabc': if s=='a': break print（s,end='') 知识点：循环的嵌套
A．xyzxyzxyz
B．xyzaxyzaxyza
C．xxxyyyzzz
D．xxxyyyzzzaaa
