To remedy a leaking fire hose connection at the hydrant,secure the valve and().
A、replace the gasket in the male coupling
B、reduce fire pump pressure
C、replace the gasket in the female coupling
D、rethread the male coupling
A、replace the gasket in the male coupling
B、reduce fire pump pressure
C、replace the gasket in the female coupling
D、rethread the male coupling
A、Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired on the spot B、Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired on the next port of call C、Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired until the next stop D、Any leaks in piping, propeller shaft, machinery, tanks, will have to be at least patched up
A、A.boiling and cavitations; low temperature B、B.boiling and cavitations; pressurized C、C.leaking and boiling; low temperature D、D.leaking and boiling; pressurized
A、after drydocking,while the hull is moist B、after drydocking,and the hull has dried C、afloat,where it is leaking D、afloat,in all accessible areas
A、A.by more than 5 percent B、B.by less than 10 percent C、C.to 95 percent D、D.to less than 90 percent
A、the engine was over filled B、there might be a fuel leak C、there might be a water leak D、all of the above