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重型工业燃气轮机的大检和大修周期长,综合维护费用低于航空改型燃气轮机。The large inspection and overhaul period of heavy industrial gas turbine are long, and the comprehensive maintenance fee is lower than the air engine gas turbine.


参考答案和解析
燃气轮机本体检修分为三个等级,分别是: (1)燃烧系统检查,也称为小修; (2)热通道检查,也称为中修; (3)整机检查,也称为大修。
更多 “重型工业燃气轮机的大检和大修周期长,综合维护费用低于航空改型燃气轮机。The large inspection and overhaul period of heavy industrial gas turbine are long, and the comprehensive maintenance fee is lower than the air engine gas turbine.” 相关考题
考题 与重型工业燃气轮机相比,航空改型燃气轮机的主要优点是()。A、轻便B、大检、大修周期长C、检修停运时间短D、维修方便

考题 One of the disadvantages of using carbon dioxide to extinguish a fire in an enclosed space isA.the 'snow' which is sometimes discharged along with the gas is toxicB.prolonged exposure to high concentrations of CO2 gas causes suffocationC.rapid dissipation of the CO2 vaporD.the CO2 gas is lighter than air and a large amount is required to extinguish a fire near the deck

考题 The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by_______.A.large conical springsB.compressed air pressureC.hydraulic pressureD.exhaust gas pressure

考题 The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the_______.A.inlet nozzle ringB.turbine wheel bladeC.diffuser passagesD.inlet volute

考题 The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually______.A.greater than the average exhaust manifold pressureB.less than the average exhaust manifold pressureC.greater at the turbine wheel than at the impellerD.greater at reduced engine speed

考题 How does an inert gas system on a tanker function to prevent explosions in cargo tanks?A.De-energizes the "charged mist" effectB.Maintains a positive pressure on the vent header to cool the flammable vaporsC.Inert gas filters out the flammable vapors from the cargo tank spacesD.Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit

考题 Air Bus’ world-renowned hot-section engineering______the needs of industrial gas turbine customers.A.replies B.answers C.frees D.addresses

考题 燃气轮机排气温度分散度(exhaust gas temperature spread(EGT spread))

考题 轻型燃气轮机则是由()改型的工业燃气轮机。其优点是使用(),起动()

考题 燃气轮机(gas turbine)

考题 单选题How does an inert gas system on a tanker function to prevent explosions in cargo tanks? ()A De-energizes the charged mist effectB Maintains a positive pressure on the vent header to cool the flammable vaporsC Inert gas filters out the flammable vapors from the cargo tank spacesD Inert gas dilutes the flammable vapor and air concentrations to keep them below the lower explosive limit

考题 单选题Intake air flow from a diesel engine turbocharger is directly proportional to engine()A exhaust gas pressureB exhaust gas temperatureC speedD load

考题 单选题The fresh air intake of the inert gas system().A prevents the flue gas from falling below 3% content of oxygenB allows the inert gas piping to be used for gas freeing the tanksC opens when there is excessive vacuum on the deck water sealD enables outside air to mix with and cool hot flue gasses

考题 单选题The hot expanding gas rotates the blades of the exhaust turbine, thus giving out large part of its power, which drives ().A the oil separatorB the fresh water generatorC the compressorD fire pump

考题 单选题The diesel engine exhaust gas bypass, as fitted with some waste heat boilers, is installed to ()A prevent engine back pressure at heavy loadsB increase total engine efficiency at low loadsC prevent boiler corrosion at low engine loadsD improve engine fuel consumption at any load

考题 单选题Diesel engine mufflers or silencers reduce the engine exhaust noise by ()A passing the exhaust through long head pipesB diffusing exhaust vibrations through activated carbon bafflesC increasing the exhaust gas velocityD reducing the exhaust gas velocity

考题 单选题One of the disadvantages of using carbon dioxide to extinguish a fire in an enclosed space is ().A the snow which is sometimes discharged along with the gas is toxicB prolonged exposure to high concentrations of C02 gas causes suffocationC rapid dissipation of theC02 vaporD the C02 gas is lighter than air and a large amount is required to extinguisha fire near the deck

考题 单选题Diesel engine mufflers accomplish noise reduction by ()A reducing exhaust gas velocityB increasing the frequency of gas vibrationC the use of long head pipesD the use of zinc electrodes

考题 单选题After passing through the turbine the exhaust gas is conducted out into the().A intercoolerB compressorC cylinderD open air

考题 单选题The relative air pressure in the inlet manifold of a turbocharged diesel engine is usually()A greater than the average exhaust manifold pressureB less than the average exhaust manifold pressureC greater at the turbine wheel than at the impellerD greater at reduced engine speed

考题 单选题The term diesel engine scavenging means()A delivering more air into the cylinder than it would normally receive during an ordinary charging processB forcing the products of combustion out of the cylinder with the fresh air chargeC collecting the air charge at the cleanerD combustion and expansion of hot gas

考题 单选题For a generator engine, after passing through the turbine the exhaust gas may be conducted out into the ().A intercoolerB open airC oil fired boilerD B and C

考题 单选题Why will a turbocharger diesel engine produce black smoke if excessive additional load is applied too quickly?()A Exhaust energy would draw excess airB The inertia of the turbocharger rotor causes a time lag which delays the turbocharger speed increaseC Exhaust gas pumping losses are increased due to turbine windageD Exhaust gas back pressure falls slightly due to increased nozzle action

考题 单选题When one cylinder has a lower compression pressure and higher exhaust gas temperature than any of the other engine cylinders, which of the conditions listed will indicated?()A Advanced ignitionB Clogged air intakeC Leaky exhaust valveD High exhaust pressure

考题 单选题When restarting a heavy fuel diesel engine that has been stopped for some time, the engine should()A increase the starting air pressureB use a higher than normal cranking speedC increase the fuel injection pressureD use a fuel having a lower ignition temperature

考题 单选题The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by ().A large conical springsB compressed air pressureC hydraulic pressureD exhaust gas pressure

考题 单选题“This increase in charge air density is accomplished on most modern diesel engine types by use of exhaust gas turbo-charging, in which a turbine wheel driven by exhaust from the engine is rigidly coupled to a centrifugal type air compressor” According to this sentence, we can know that increases density(), drives the compressor directly()A a modern diesel engine;a turbine wheelB a modem diesel engine;exhaust gasesC a compressor;an exhaust gas turbochargerD a compressor;a turbine wheel

考题 单选题Gas turbines differ from steam turbines in that ().A steam rather than gas is used to turn a shaftB vapor rather than gas is used to turn a shaftC the former uses gas to turn a shaftD the latter uses gas to turn a shaft