A self-contained breathing apparatus is used to（）.

相似题目

• Emergency escape breathing device on board shall have a duration of service no less than（）.

  A . 20 minutes B . 15 minutes C . 10 minutes D . 5 minute

  查看最佳答案

• 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

  查看最佳答案

• 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 properly B . The face mask is not sealed properly C . The air bottle needs to be refilled D . The air supply hose has a leak

  查看最佳答案

• The self-contained breathing device should not be used in which situation（）.

  A . Oxygen deficient spaces B . Compartments containing poisonous vapors C . Fighting fires that produce heavy smoke D . Underwater search

  查看最佳答案

• A 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 perso

  查看最佳答案

• The rated operating time of a self-contained breathing device may be reduced in actual use because of（）.

  A . pressure differences in the atmosphere B . the length of the hose attached to the facepiece C . the physical exertion of the person wearing the device D . spaces containing poisonous vapor

  查看最佳答案

• 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 Administration B . the same self-contained breathing apparatus required with the fireman's outfit C . an oxygen breathing apparatus，provided that the device has been inspected within three years D . a portable ventilation system that will provide a complete change of air every three minute

  查看最佳答案

• When entering a foam injected space （） breathing apparatus.

  A . put out B . put on C . take off D . take i

  查看最佳答案

• 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 ga

  查看最佳答案

• Which one is not the component of a typical, marine pattern self-contained unit?（）

  A . a centrifugal fan B . a direct expansion cooler C . a hermetic compressor D . a centrifugal pum

  查看最佳答案

• 验船师在某杂货船上进行设备安全证书的换新检验，在检查证书文件时发现一份关于该船满足SOLAS第II-2章第19条危险货物运输要求的“符合证明”（Document of compliance）。在随后检查到消防员装备（Fire-fighter’s outfits）和SOLAS第II-2章第19条所要求的两套自给式呼吸器（self-contained breathing apparatuses）时，发现船上一共有三套自给式呼吸器。他随即向船长指出还缺少一套。请问验船师的依据是什么？

  查看最佳答案

• 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

  查看最佳答案

• A shipmate suffers a heart attack and stops breathing. You must（）.

  A . administer oxygen B . immediately check his pulse and start CPR C . make the victim comfortable in a bunk D . immediately give a stimulant，by force if necesssary

  查看最佳答案

• CPR初步救生阶段为C（Compressions），A（Airway），B（Breathing），其中C是指（）。

  A . 判断神志 B . 人工循环 C . 开放气道 D . 人工呼吸

  查看最佳答案

• A healthy man is not _____ of his breathing.

  查看最佳答案

• 现场医学规定，心肺复苏的步骤应该是A（Airway）-B（Breathing）-C（Circulation）。（）

  查看最佳答案

• A self-contained literature review not only presents new information, but also summarizes multiple previous studies.

  查看最佳答案

• DNC is a self-contained NC system for a single machine tool.

  查看最佳答案

• 27. Why did the driver call the author and his brother "a breath of fresh air"?

  A、<p>&nbsp;Because they helped him with his flat tire.</p> B、Because they saved him from a minor car accident. C、<p>Because they showed him the right way back home.</p> D、<p>&nbsp;Because they comforted him and gave him some money.</p>

  查看最佳答案

• In Beoulf, the Anglo-Saxons fought agaist the monster Grendel and a fire breathing dragon.（）

  是 否

  查看最佳答案

• She was（）breath climbing the stairs.A.out

  B into C.at D.out of

  查看最佳答案

• 听力原文：Donna should save a breath because she can't convince her friends who mm a deaf ear to whatever she says.

  (25) A．Donna should give her friends a chance to explain. B．Donna shouldn't bother to try to change her friends' opinion. C．Donna's friends are too deaf to give any attention to her suggestion. D．Donna should convince her brother to visit her friends.

  查看最佳答案

• The nuclear family&nbsp;（） a self-contained, self-satisfying unit composed of father, mother and children.

  A．refers to B．defines C．describes D．devotes to

  查看最佳答案

• logic, far from being a dry, pedantic discipline, is a living, breathing thing, full of beauty, passion, and trauma.

  查看最佳答案