Safety valves on a boiler vent to the

1、A safety outlet is provided on the CO2

A safety outlet is provided on the CO2 discharge piping to prevent（）.Aover pressurization of the space being floodedBrupture of cylinder due t...

2、In setting the valves on a steam-smoth

In setting the valves on a steam-smothering system on a tank vessel，the master control valve to cargo tanks should be（）.Aopen and individual...

3、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

4、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

5、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...

6、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...