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除氧器定压运行（fixed pressure operAtion of deAerAtor）
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更多 “除氧器定压运行（fixed pressure operAtion of deAerAtor）” 相关考题
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During the valve overlap period, the exhaust pressure of a turbocharged four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure ______.A.effective cylinder scavenging and coolingB.constant pressure from the turbochargersC.cooler operation of the exhaust systemD.effective constant pressure for turbocharger operation
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定压运行除氧器由于其（），在运行中只要调整除氧器给水箱中水位稳定，即可保证给水泵不汽蚀，能可靠的向锅炉供水。A、压力、温度可变B、B.压力、温度不变C、含氧量不变D、加热器抽气压力调整阀开度不变
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进入除氧器的疏水汽化和排汽产生的蒸汽量已经满足或超过除氧器的用汽需要，使除氧器内的给水不需要抽汽加热自己沸腾，这种现象称为除氧器的（）。A、滑压运行B、定压运行C、热力除氧现象D、自生沸腾现象
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单选题With reference to a rotary vane steering gear system, which one of the following statements is true?（）A
The three moving vanes and the three fixed vanes form three pressure chambersB
The three moving vanes and the three fixed vanes form six pressure chambersC
The three moving vanes and the three fixed vanes form nine pressure chambersD
The three moving vanes and the three fixed vanes form twelve pressure chambers
考题
单选题During the valve overlap period, the exhaust pressure of a turbochargers, four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure （）A
effective cylinder scavenging and coolingB
constant pressure from the turbochargersC
cooler operation of the exhaust systemD
effective constant pressure for turbocharger operation
考题
单选题Bad valves operation of the reciprocating air compressors can be detected by observation of （）.A
the discharge temperature lowB
the discharge temperature highC
the discharge pressure riseD
the inter-stage pressure low
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