The disadvantage of using CO<sub>2</sub> is that the().
A、CO2 does not cool the fire
B、cylinders are regulated pressure vessels
C、C02 is not effective on class B fires
D、C02 is not effective on class C fires
A、CO2 does not cool the fire
B、cylinders are regulated pressure vessels
C、C02 is not effective on class B fires
D、C02 is not effective on class C fires
A、higher working temperature of piston and cylinder B、the use of scavenge ports C、fewer power strokes per revolution of the crankshaft D、part of the fuel is burned as the piston is moving away from top dead center
A、Transport subject to traffic delays B、Transport subject to breakdown C、Goods susceptible to damage through careless driving D、Bad weather
A、Transport subject to traffic delays B、Transport subject to breakdown C、Goods susceptible to damage through careless driving D、Bad weather
A、A.more power strokes per revolution B、B.the use of scavenge air C、C.more complicated valve gear D、D.higher working temperature of the piston and cylinder
A、the extra weight required for the diesel reduction gearing B、a minimum speed for the engines that limits the minimum speed of the vessel C、the higher fuel consumption per SHP D、the low efficiency of the system when a controllable pitch propeller is used
A、It does not scale well B、It converges slower than OSPF C、It is a proprietary protocol D、It is a distance vector protocol
A、deteriorates in sunlight B、cuts on sharp edges C、is vulnerable to damage and pilferage D、All of the above