Why should you wear a self-contained breathing apparatus bef

题目
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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相似问题和答案

第1题:

What is the minimum period of time that the air supply for a self-contained breathing apparatus is required to last?________.

A.10 minutes

B.20 minutes

C.30 minutes

D.90 minutes


正确答案:C
自己式呼吸器的时间是最少30分钟。

第2题:

The bypass valve on a self-contained breathing device should be opened if ______.

A.You are entering a space containing poisonous vapors

B.You are entering a space containing explosive gases

C.The regulator of the breathing apparatus malfunctions

D.The face piece of the breathing device is too tight


正确答案:C

第3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 station

B.be equipped with battery powered emergency lighting

C.be marked SELF-CONTAINED BREATHING APPARATUS

D.All of the above


正确答案:C
在船上有自给式呼吸器的舱室或空间必须被标记“SELF-CONTAINEDBREATHINGAPPARATUS”。

第4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。

正确答案:A

第5题:

Gas masks ______.

A.should be worn while fighting a fire

B.can be used in atmospheres deficient in oxygen

C.filter contaminants from air that is to be breathed

D.may be substituted for a self-contained breathing apparatus


正确答案:C
气体面具过滤用于呼吸的空气中的污染物。

第6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.One

B.Two

C.Three

D.Four


正确答案:C

第7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 body

B.allow the wearer to manually give himself oxygen

C.release excess heat which would otherwise cause the bottle to explode

D.allow exhaled gases to pass outside the bottle


正确答案:B

第8题:

Self-contained breathing apparatus is used to ______.

A.make underwater repairs to barges

B.determine if the air in a tank is safe for men

C.enter areas that may contain dangerous fumes or lack oxygen

D.resuscitate an unconscious person


正确答案:C
自给式呼吸设备被用于进入一个可能含有有毒气体或氧气不足的区域。

第9题:

There is a smell of gas in the hold. You must wear your ()(氧气面罩).

  • A、fire mask
  • B、breathing apparatus
  • C、life-jacket
  • D、fire drill

正确答案:B

第10题:

There is a smell of gas in the hold. You must wear your ().

  • A、life-jacket
  • B、fire mast
  • C、breathing apparatus
  • D、life suit

正确答案:C

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