When using a high-velocity fog stream in a passageway, the possibility of a blow back must be guarded against. Blow back is most likely to occur when _________________.
A
pressure builds up in the nozzle which causes a surge of water
B
the only opening in a passageway is the one from which the nozzle is being advanced
C
pressure in the fire hose drops below 100 psi
D
a bulkhead collapses due to heat and pressure
E
İlgili Sorular
When a vessel is involved in a casualty. The cost of property damage includes the __________.A cargo of oil has a coefficient of expansion of .0005 per degree F. If this cargo is loaded at 70...An instrument designed to maintain a continuous record of atmospheric pressure is a(n) __________.A hygroscopic cargo is defined as a cargo __________.On small passenger vessels all connections to electrical§conductors MUST be ________.