One advantage of the all-purpose nozzle is that it().
A、can fit any size hose
B、converts a stream of water into a fog
C、increases the amount of water reaching the fire
D、can spray two streams of water at the same time
A、can fit any size hose
B、converts a stream of water into a fog
C、increases the amount of water reaching the fire
D、can spray two streams of water at the same time
A、One hour after the predicted time B、At the predicted time C、30 minutes before flood,one hour after an ebb D、30 minutes before the predicted time
A、operated by one winchman B、cradled on deck C、swung from one hatch to the adjacent hatch D、collared to the mast
A、It increases its volume B、It reduces its volume C、It has less product per volume D、None of the above
A、The high discharge pressure of the rotary pumps permits a larger volume of fluid per unit time than the reciprocating pump B、Rotary pumps are capable of pumping more fluid than reciprocating pumps of the same weight C、Rotary pumps occupy only one-half the space of reciprocating pumps D、Rotary pumps eliminate discharge slippage of the pumped liquid, while this does not hold true for a reciprocating pump
A、provide the better working condition for stevedore and crew B、take the advantage of cargo handling and keep a good maintenance of the vessel C、standardize the size and package of the general cargo D、reduce handling cost and damage of cargo and shorten the ship's turn round time in port
A、increase the towing hawser's catenary and provide more spring B、reduce catenary,allow operation in shallower water,and to release one barge without breaking up the entire tow C、enable one tug and its crew without any outside assistance to make up or break down the tow D、provide rapid delivery of logs from the northwestern United States to Hawaiian sawmills
A、it is fitted with neoprene O-ring seals B、the honing process makes it easier to maintain the desired oil film C、there is likelihood of water leaking into the combustion space D、it fits more loosely due to a decrease in heat transfer through the composite wall
A、one meter from the tank bottom and one meter below the tank top B、one half the ullage of the tank and one meter below the tank top C、one half the ullage of the tank and one meter above the tank bottom D、at three meter intervals from the tank top to the bottom