The difference in water spray pattern between the high-velocity tip and low-velocity applicator used with the all-purpose nozzle is due to ______.A.a difference in water pressureB.the method of breaking up the water streamC.the length of the applicatorD.All of the above
The difference in water spray pattern between the high-velocity tip and low-velocity applicator used with the all-purpose nozzle is due to ______.
A.a difference in water pressure
B.the method of breaking up the water stream
C.the length of the applicator
D.All of the above
相关考题：
One advantage of the all-purpose nozzle is that it ______.A.can fit any size hoseB.converts a stream of water into a fogC.increases the amount of water reaching the fireD.can spray two streams of water at the same time
The difference in tones between the displacement in salt water at summer load waterline and the light weight of the vessel is______．A.gross tonnageB.net tonnageC.DisplacementD.deadweight
Deadweight is ________ ．A.the tonnes of the displacement of a vessel in water of a specific gravity of 1．025 at summer load water lineB.the difference in tonnes between the displacement in salt water at summer load waterline and the light weight of the vesselC.the cargoes in tonnes that can be loaded in a vessel at summer load water lineD.the bale capacity in cubic meters of a vessel
The height of tide is the ______.A.depth of water at a specific time due to tidal effectB.difference between the depth of the water and the area's tidal datumC.difference between the depth of the water and the high water tidal levelD.difference between the depth of the water at high tide and the depth of the water at low tide
The high-velocity fog tip used with the all-purpose fire fighting nozzle should always be ______．A.Attached by a chainB.Coated with heavy grease to prevent corrosionC.Painted red for identity as emergency equipmentD.Stored in the clip at each fire station
If not attached to the nozzle, each low-velocity spray applicator on a vessel must be stowed__________.A.in a protected area on the main deckB.inside a machinery space near the entranceC.next to the fire hydrant to which the fire hose is attachedD.on a rack inside the quarters near the entrance
What does the command show | compare rollback 1 display?（）A、the difference between the current candidate configuration and the candidate configuration from one commit agoB、the difference etween the current active configuration and the active configuration from the one commit agoC、the difference between the current active configuration and the active configuration from one commit agoD、the difference between the current candidate configuration and the archived configuration from one commit ago
What does the command show | compare rollback 1 display?（）A、the difference between the current candidate configuration and the candidate configuration from one commit agoB、the difference between the current active configuration and the current candidate configurationC、the difference between the current active configuration and the active configuration from one commit agoD、the difference between the current candidate configuration and the archived configuration from one commit ago
单选题One advantage of the all-purpose nozzle is that it（）.Acan fit any size hoseBconverts a stream of water into a fogCincreases the amount of water reaching the fireDcan spray two streams of water at the same time
单选题The dew point temperature is（）.Aalways higher than the air temperatureBalways lower than the air temperatureCequal to the difference between the wet and dry bulb temperaturesDthe temperature at which the air is saturated with water vapor
单选题What does the command show | compare rollback 1 display?（）Athe difference between the current candidate configuration and the candidate configuration from one commit agoBthe difference between the current active configuration and the current candidate configurationCthe difference between the current active configuration and the active configuration from one commit agoDthe difference between the current candidate configuration and the archived configuration from one commit ago
单选题High-velocity fog（）.Ais a finer，more diffuse water spray than low-velocity fogBrequires that the water pressure be no greater than 60 psiCproduces an effective fog pattern no more than 6 feet beyond the nozzleDextinguishes a fire by absorbing heat and reducing the supply of oxygen
单选题The height of tide is the （）.Adepth of water at a specific time due to tidal effectBdifference between the depth of the water and the area's tidal datumCdifference between the depth of the water and the high water tidal levelDdifference between the depth of the water at high tide and the depth of the water at low tide
单选题Which of the followings will affect the spray of fuel oil?（）Acoke depositsBcylinder water temperatureCasphalt in fuel oilDlub oil
单选题The design of for a flash type evaporator is of critical importance because it must provide an optimum feedwater spray pattern that facilitates the flashing process, and it must also maintain a pressure differential between successive stages（）AcondenserBflashing deviceClashing deviceDvacuum pump
单选题The difference in water spray pattern between the high-velocity tip and low-velocity applicator used with the all-purpose nozzle is due to（）.Aa difference in water pressureBthe method of breaking up the water streamCthe length of the applicatorDAll of the above
单选题What could cause a significant difference between actual chain tension and the tension measured by the tensiometer? （）AThe type of anchor and mooring line being usedBThe type of bottom in which the ship is anchoredCA significant difference between air and water temperatureDThe chain contacting a chock or fairlead between the tensiometer and the lower swivel fairlead
单选题The spray of water in low-velocity fog will have（）.Agreater range than high-velocity fogBlesser range than high-velocity fogCabout the same range as high-velocity fogDgreater range than a solid stream
单选题What does the command show | compare rollback 1 display?（）Athe difference between the current candidate configuration and the candidate configuration from one commit agoBthe difference etween the current active configuration and the active configuration from the one commit agoCthe difference between the current active configuration and the active configuration from one commit agoDthe difference between the current candidate configuration and the archived configuration from one commit ago
单选题Distortion of the spray pattern of a nozzle or injector may be indicated by a/an（）Ahigh firing pressureBoverload of that particular cylinderCsmoky exhaustDcooling water temperature rise
单选题A distorted spray pattern from a fuel injector can cause a diesel engine to have （）Ahigher firing pressureBmore power outputClower fuel pressureDless power output
单选题On what do you depend having the air cooler of main engine chemically washed?（）Aincreased air pressure differenced before and aft air coolerBreduced exhaust temperature in all cylindersCreduced temperature difference between water inlet and outletDboth A and C
单选题A fire main system must have enough fire hydrants so that each accessible space may be sprayed with（）.Aa low velocity spray applicatorBa water spray or solid streamCat least two spray patterns of waterDat least 25 psi delivered pressure
单选题If not attached to the nozzle,each low-velocity spray applicator on a vessel must be stowed（）.Ain a protected area on the main deckBinside a machinery space near the entranceCnext to the fire hydrant to which the fire hose is attachedDon a rack inside the quarters near the entrance
单选题The 12-foot low-velocity fog applicator（）.Ahas a spray pattern 12 feet in diameterBcan be used in conjunction with both 1-1/2 inch and 2-1/2 inch all-purpose nozzlesChas a 90°bend at its discharge endDhas a screw thread end which connects to the all-purpose nozzle
单选题Firefighting foam is only effective when the foam（）.Apenetrates to the bottom of the fireBis kept saturated with low-velocity water fogCmixes with the burning fuel oilDcompletely covers the top of the burning liquid