The() is a smaller valve fitted in the auxiliary steam supply line, and is usually of the non-return type.
相似题目
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If the compensating needle valve of a hydraulic governor is opened more than necessary the governor will ()
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A common trouble with the fuel pump plungers or fuel valve spindle is ().
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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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In its simplest form the pressure reducing valve is opened or closed by () which is balanced by the downstream pressure acting on a diaphragm.
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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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A(n) () is a special type of valve which prevents the passage of steam but allows condensate to pass.
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A large valve,usually installed above the ram preventers,that forms a seal in the annular space between the pipe and wellbore or,if no pipe is present,on the wellbore itself is called the().
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A feeler or thermal bulb is used for the expansion valve to ().
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If a single cylinder relief valve on a diesel engine lists frequently while the engine is running, the cause may be an ()
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In order to maintain a constant outlet water temperature of 80-85℃ from the engine, a three-way valve is installed()
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A thermostatic expansion valve is properly controlling evaporator superheatAdjusting this valve to lower the superheat will result in a/an ().
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If the engine is naturally aspirated, or is a small high-speed type with a centrifugal turbocharger, the period of valve overlap(),ie when both valves are(), will be and the exhaust valve will close some 10°top dead canter().
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A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a().
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A common trouble with the fuel pump plunger or fuel valve spindle is ().
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The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to ().
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Which of the listed statements is a characteristic of the liquid charged power element used with thermostatic expansion valves?()
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When a refrigeration compressor is in the ‘off’ cycle, the thermal expansion valve will().
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The primary function of a fuel delivery check valve assembly is to()
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The valve best suited for throttling gas or liquid flow in a pipeline is the().
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Australia is almost as big as the US, but has a smaller population.
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When the air in a certain space is squeezed to occupy a smaller space, the air is said to be ______.
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When a refrigeration compressor is in the ‘off’ cycle, the thermal expansion valve will .
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When the relief valve is used as a constant pressure valve, it is connected to the outlet of the hydraulic pump to ensure that the outlet pressure of the hydraulic system (pump) is constant.
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Router R1 learns two routes with BGP for prefix 200.1.0.0/16. Comparing the two routes, route 1 has a shorter AS_Path Length, smaller MED, the same Weight, and smaller Local PreferencE.Which of the following is true about Router R1‘s choice of best path for this prefix?()