Control valves of a CO2 system may be located within the protected space when().
相似题目
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In setting the valves on a steam-smothering system on a tank vessel,the master control valve to cargo tanks should be().
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The series of valves used to control the return flow in well control operations is called the().
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Which of the following problems will occur if the internal drain at either end of a hydraulic, two-way, spool-type directional control valve cylinder were to become plugged?()
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The purpose of the purge valve at the top of the condenser in a refrigerating system is to()
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The globe valve has a bulbous body, housing a valve seat and screw down plug or disc arranged at right angles to the axis of the pipeAccording to the above sentence, which of the following statements is not true?()
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In setting the valves on a steam-smothering system on a tanker,the master control valve to cargo tanks should be().
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A(n) () is a special type of valve which prevents the passage of steam but allows condensate to pass.
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Which of the following will be the advantage of a centrifugal pump as compared with a reciprocating pump?() (1) Its discharge is continuous (2) It has no internal valves (3) Upon accidental closing of discharge valve, excessive pressure will not build up
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Prior to running the hydraulic pump, examine the system carefully and ensure that the lever of control valves is in () position.
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A three-way thermostatic control valve regulates the diesel engine cooling water temperature by passing a portion of the water ().
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Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?()
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A branch line valve of a fire extinguishing system on a ship must be marked with the().
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Dirt lodged on the nozzle valve seat of a fuel injection nozzle will cause()
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Operation of the valve control release on a fixed CO2 system must immediately().
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The needle valve in a fuel valve will () when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.
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The deck control valve to be()after being repaired.
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() supplies pilot air to control the cylinder air start valves.
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Friction developing between the moving parts of a governor, governor linkage and control valve will cause the governor to ().
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Upon the survey it is found the deck control valve of the fore peak tank could not be().
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The primary function of a fuel delivery check valve assembly is to()
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Numerical control is designed to control the operation of a machine tool by a series of coded instructions called a program.
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Numerical control is designed to control the operation of a machine tool by a series of coded instructions called a program.
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The software of a CNC system consists of a part program, a service program and a control program.
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