In setting the valves on a steam-smothering system on a tank vessel，the master control valve to cargo tanks should be（）.
1、Safety valves on a boiler vent to the
Safety valves on a boiler vent to the （）.Afuel tankBbilgeCatmosphereDauxiliary exhaust line
2、The valve on the discharge side of a c
The valve on the discharge side of a cargo pump on a tanker will usually be a（）.Abutterfly valveBspectacle valveCcheck valveDglobe valve
3、The expansion valve on a Freon system
The expansion valve on a Freon system controls the （）.Asuperheat of the gas leaving the compressorBback pressure in the evaporatorCtemperature of the iceboxDsuperheat of the gas leaving the evaporator
4、In setting the valves on a steam-smoth
In setting the valves on a steam-smothering system on a tanker，the master control valve to cargo tanks should be（）.Aopen and individual tank...
5、The bypass valve on a self-contained b
The bypass valve on a self-contained breathing device should be opened if（）.Ayou are entering a space containing poisonous vaporsByou are enter...
6、The valve on the discharge side of a c
The valve on the discharge side of a cargo pump on a tank vessel will usually be a（）.Abutterfly valveBspectacle valveCcheck valveDglobe valve