A、open and individual tank valves open
B、open and the individual tank valves closed
C、closed and the individual tank valves closed
D、closed and the individual tank valves open
更多“In setting the valves on a steam-smothering system on a tanker，the master control valve to cargo tanks should be（）.”相关的问题
A、open and individual tank valves open B、open and the individual tank valves closed C、closed and the individual tank valves closed D、closed and the individual tank valves open
A、A.set the relief valve B、B.check the lubrication system C、C.vent the pump casing D、D.open the pump suction and discharge valves
A、fuel valves of main engine B、injector pump of main engine C、safety valves of marine boiler D、safety valves of a reciprocating pump
A、A.a burned out solenoid in the oil supply valve B、B.high temperature excess air C、C.incorrectly setting the hot-well dump valve D、D.an incorrectly positioned burner snubber realy
A、by an fuel valve B、through an inlet valve C、with an exhaust valve D、from an outlet valve
A、check valve installed in the line B、shut off valve at a manifold near the pump C、quick disconnect union within ten feet of the pump D、regulator in the line set at 125 psi
A、If present, the settings in the $HOME/.profile file will override the settings in the /etc/profile file. B、If both $HOME/.profile and $HOME/.env files are present, the settings in the $HOME/.profile file will take precedence. C、The settings in the /etc/environment file are system-wide and will override user customized settings in the $HOME/.profile. D、The settings in the /etc/profile file will override settings in the $HOME/.profile file unless the $LOCAL_PROFILE variable is set to 'true'.
A、freeze on the expansion valve seat and reduce the flow of liquid refrigerant B、emulsify the oil in the condenser C、freeze in the king valve D、clog the oil trap
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