网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
The spray of water in low-velocity fog will have（）.
A
greater range than high-velocity fog
B
lesser range than high-velocity fog
C
about the same range as high-velocity fog
D
greater range than a solid stream
参考答案
参考解析
解析：
暂无解析
更多 “单选题The spray of water in low-velocity fog will have（）.A greater range than high-velocity fogB lesser range than high-velocity fogC about the same range as high-velocity fogD greater range than a solid stream” 相关考题
考题
()the fog, we should have reached the annual meeting site on time.A. Because ofB. In spite ofC. But for
考题
What a waste! Why do you () the water () all the time ?
A、have…flowingB、have…flowC、have…to flowD、have…flowed
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
考题
The difference in water spray pattern between the high-velocity tip and low-velocity applicator used with the all-purpose nozzle is due to ______.A.a difference in water pressureB.the method of breaking up the water streamC.the length of the applicatorD.All of the above
考题
If a firefighting situation calls for low-velocity fog you would ______．A.order the engine room to reduce pressure on the fire pumpB.put the lever on an all-purpose fire nozzle all the way forwardC.attach a low-velocity fog applicator with the nozzle shut downD.put the lever on an all-purpose fire nozzle all the way back
考题
After being launched from a vessel, totally enclosed survival craft which have been afloat over a long period require ______.A.frequent opening of hatches to permit entry of fresh airB.regular checks of bilge levelsC.use of ear plugs to dampen engine noiseD.frequent flushing of the water spray system with fresh water
考题
Firefighting foam is only effective when the foam _____.A.penetrates to the bottom of the fireB.is kept saturated with low-velocity water fogC.mixes with the burning fuel oilD.completely covers the top of the burning liquid
考题
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
考题
单选题If a firefighting situation calls for low-velocity fog you would（）.A
order the engine room to reduce pressure on the fire pumpB
put the lever on an all-purpose fire nozzle all the way forwardC
attach a low-velocity fog applicator with the nozzle shut downD
put the lever on an all-purpose fire nozzle all the way back
考题
单选题After being launched from a vessel，totally enclosed survival craft which have been afloat over a long period require（）.A
frequent opening of hatches to permit entry of fresh airB
regular checks of bilge levelsC
use of ear plugs to dampen engine noiseD
frequent flushing of the water spray system with fresh water
考题
单选题Water fog from an all-purpose nozzle may be used to（）.A
fight an electrical fireB
fight a magnesium fireC
eliminate smoke from a compartmentD
All of the above
考题
单选题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
考题
单选题The all-purpose nozzle will produce a fog spray when you（）.A
pull the nozzle handle all the way back toward the operatorB
pull the nozzle handle back to a position where the handle is perpendicular to the plane of the nozzleC
push the nozzle handle forward as far as it will goD
insert a fog applicator between the fire hose and nozzle
考题
单选题Which firefighting method is an example of an indirect attack on a fire?（）.A
Bouncing a straight stream of water off the overhead to create spray effectB
Spraying foam on a bulkhead and letting it flow down and over a pool of burning oilC
Flooding a paint locker with CO2 and sealing the compartmentD
Cooling adjacent bulkheads with water to prevent the spread of the fire by conduction
考题
单选题High-velocity fog（）.A
is a finer，more diffuse water spray than low-velocity fogB
requires that the water pressure be no greater than 60 psiC
produces an effective fog pattern no more than 6 feet beyond the nozzleD
extinguishes a fire by absorbing heat and reducing the supply of oxygen
考题
单选题Which of the followings will affect the spray of fuel oil?（）A
coke depositsB
cylinder water temperatureC
asphalt in fuel oilD
lub oil
考题
单选题You are underway in fog and you hear one prolonged blast followed by two short blasts.This is a vessel（）.A
TowingB
Engaged on pilotage dutyC
Aground in a fairwayD
Stopped and making no way through the water
考题
单选题All classes of fires can be safely combated using（）A
foamB
CO2C
low velocity water fogD
high velocity water fog
考题
单选题Fog forms when the air（）.A
is 50% water saturatedB
is 90% water saturatedC
temperature is greater than the dew point temperatureD
temperature is equal to，or below the dew point temperature
考题
单选题What is NOT a function of the air supply of a covered lifeboat?（）A
Provides air for engine combustionB
Pressurizes water spray systemC
Provides air for passenger respirationD
Prevents smoke and other noxious fumes from entering craft
考题
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（）.A
a difference in water pressureB
the method of breaking up the water streamC
the length of the applicatorD
All of the above
考题
单选题The primary method by which water spray puts out fires is by（）.A
removing the oxygenB
cooling the fire below the ignition temperatureC
removing combustible materialD
diluting combustible vapors
考题
单选题Distortion of the spray pattern of a nozzle or injector may be indicated by a/an（）A
high firing pressureB
overload of that particular cylinderC
smoky exhaustD
cooling water temperature rise
考题
单选题A fire main system must have enough fire hydrants so that each accessible space may be sprayed with（）.A
a low velocity spray applicatorB
a water spray or solid streamC
at least two spray patterns of waterD
at least 25 psi delivered pressure
考题
单选题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
考题
单选题The 12-foot low-velocity fog applicator（）.A
has a spray pattern 12 feet in diameterB
can be used in conjunction with both 1-1/2 inch and 2-1/2 inch all-purpose nozzlesC
has a 90°bend at its discharge endD
has a screw thread end which connects to the all-purpose nozzle
考题
单选题Firefighting foam is only effective when the foam（）.A
penetrates to the bottom of the fireB
is kept saturated with low-velocity water fogC
mixes with the burning fuel oilD
completely covers the top of the burning liquid
热门标签
最新试卷