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单选题
Why should you wear a self-contained breathing apparatus before entering the engine room after the fixed CO2 system has been discharged to combat a major fire?（）
A
Because carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause asphyxiation
B
Because carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gas
C
Because carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gas
D
This action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas
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更多 “单选题Why should you wear a self-contained breathing apparatus before entering the engine room after the fixed CO2 system has been discharged to combat a major fire?（）A Because carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause asphyxiationB Because carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gasC Because carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gasD This action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas” 相关考题
考题
On a ship, the locker or space containing the self-contained breathing apparatus must _____.A.be located in close proximity to the main control stationB.be equipped with battery powered emergency lightingC.be marked SELF-CONTAINED BREATHING APPARATUSD.All of the above
考题
Self-contained breathing apparatus is used to ______.A.make underwater repairs to bargesB.determine if the air in a tank is safe for menC.enter areas that may contain dangerous fumes or lack oxygenD.resuscitate an unconscious person
考题
What is the minimum period of time that the air supply for a self-contained breathing apparatus is required to last?________.A.10 minutesB.20 minutesC.30 minutesD.90 minutes
考题
You are in a tank wearing the self-contained breathing apparatus and you desire to return topside．How many tugs of the lifeline mean to take up the slack ________．A.OneB.TwoC.ThreeD.Four
考题
The bypass valve on a self-contained breathing device should be opened if ______．A.You are entering a space containing poisonous vaporsB.You are entering a space containing explosive gasesC.The regulator of the breathing apparatus malfunctionsD.The face piece of the breathing device is too tight
考题
The function of the bypass valve on the self-contained breathing apparatus is to ______．A.control the pressure of the oxygen as it enters the bodyB.allow the wearer to manually give himself oxygenC.release excess heat which would otherwise cause the bottle to explodeD.allow exhaled gases to pass outside the bottle
考题
Gas masks ______.A.should be worn while fighting a fireB.can be used in atmospheres deficient in oxygenC.filter contaminants from air that is to be breathedD.may be substituted for a self-contained breathing apparatus
考题
There is a smell of gas in the hold. You must wear your （）(氧气面罩).A、fire maskB、breathing apparatusC、life-jacketD、fire drill
考题
Wear the breathing apparatus before entering an enclosed space.（）A、在进入封闭舱室之前，戴上氧气面罩。B、在进入封闭舱室之前，戴上呼吸阀。C、在进入封闭舱室之前，戴上透气孔。D、在进入机舱室之前，戴上氧气面罩。
考题
There is a smell of gas in the hold. You must wear your （）.A、life-jacketB、fire mastC、breathing apparatusD、life suit
考题
单选题The bypass valve on a self-contained breathing device should be opened if（）.A
you are entering a space containing poisonous vaporsB
you are entering a space containing explosive gasesC
the regulator of the breathing apparatus malfunctionsD
the face piece of the breathing device is too tight
考题
单选题Gas masks（）.A
should be worn while fighting a fireB
can be used in atmospheres deficient in oxygenC
filter contaminants from air that is to be breathedD
may be substituted for a self-contained breathing apparatus
考题
单选题Wear the breathing apparatus before entering an enclosed space.（）A
在进入封闭舱室之前，戴上氧气面罩。B
在进入封闭舱室之前，戴上呼吸阀。C
在进入封闭舱室之前，戴上透气孔。D
在进入机舱室之前，戴上氧气面罩。
考题
单选题A self-contained breathing apparatus is used to（）.A
make underwater repairs to bargesB
determine if the air in a tank is safe for menC
enter areas that may contain dangerous fumes or lack oxygenD
resuscitate an unconscious person
考题
单选题Fire protection regulations for towing vessels require training in all of the following，EXCEPT（）.A
putting on a fireman's outfit，if the vessel is so equippedB
donning a self-contained breathing apparatus，if the vessel is so equippedC
activating the general alarm and reporting inoperative alarm systems and fire-detection systemsD
refilling and servicing all expended fire extinguishing equipment
考题
单选题You should always wear（）when working on deck.A
helmetB
slippersC
gogglesD
immersion suits
考题
单选题After putting on a self-contained breathing apparatus, you open the air supply and hear a continuous ringing of a bell.What does this mean?（）.A
The unit is working properlyB
The face mask is not sealed properlyC
The air bottle needs to be refilledD
The air supply hose has a leak
考题
单选题The function of the bypass valve on the self-contained breathing apparatus is to（）.A
control the pressure of the oxygen as it enters the bodyB
allow the wearer to manually give himself oxygenC
release excess heat which would otherwise cause the bottle to explodeD
allow exhaled gases to pass outside the bottle
考题
单选题The self-contained breathing device should not be used in which situation?（）A
Oxygen deficient spacesB
Compartments containing poisonous vaporsC
Fighting fires that produce heavy smokeD
Underwater search
考题
单选题Which emergency equipment should you keep near the towing bitts（）.A
A self-contained breathing apparatusB
A boat hook and a spanner wrenchC
A fire ax and/or cutting torchD
A Stokes litter basket
考题
单选题Which emergency equipment should you keep near the towing bitts? （）A
A self-contained breathing apparatus (SCBA)B
A boat hook and a spanner wrenchC
A fire ax and/or cutting torchD
A Stokes litter basket
考题
单选题You are about to enter a compartment to investigate a suspected smoldering fireIf youre not wearing a self-contained breathing apparatus, you should test the compartments atmosphere to determine if there is/are （）.A
sufficient oxygen to sustain human lifeB
an explosive mixture in the compartmentC
a toxic atmosphere in the compartmentD
All of the above
考题
单选题The basic training in fire prevention and fire fighting should include the practical elements which should allow the trainees to acquire the ability to （）.A
use self-contained breathing apparatusB
use various types of portable fire extinguishersC
effect a rescue in a smoke-filled space wearing breathing apparatusD
All of the above
考题
单选题If a victim is unconscious，you should first look for evidence of（）.A
high feverB
head injuryC
broken limbsD
irregular breathing
考题
单选题A ship must have a self-contained breathing apparatus to be used as protection from gas leaking from a refrigeration unit. To meet this requirement，you may use（）.A
a gas mask certified by the Mine Safety and Health AdministrationB
the same self-contained breathing apparatus required with the fireman's outfitC
an oxygen breathing apparatus，provided that the device has been inspected within three yearsD
a portable ventilation system that will provide a complete change of air every three minutes
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