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
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
相关考题：
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
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
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
When someone compliments the watch you are wearing, you wouldA、give it to him.B、say, &qu When someone compliments the watch you are wearing, you wouldA、give it to him.B、say, "Thanks" and smile.C、say, "Would you like to have it?"D、say, "Oh, this cheap thing? It's not worth much."
You are on a multiple product tanker and carrying methyl acrylate，diethanolamine，and triethylamine. Which statement is TRUE?A.Methyl acrylate may be loaded in a tank adjacent to diethanolamine but not triethylamineB.The heating coils to the cargo tank loaded with methyl acrylate must be blanked offC.Valve components made of aluminum，copper，or zinc may not be in contact with the cargoesD.Each crew member working on deck must have an emergency escape breathing apparatus
Which statement about entry into a space that has been sealed for a long time is TRUE ________．A.A tank that has been used to carry hazardous liquids should be tested for oxygen content，toxicity，and explosive gasesB.You can safely enter the space without a breathing apparatus if the oxygen content exceeds 14%C.The natural ventilation through the installed vents is sufficient to provide the proper oxygen contentD.The heat of the sun on upper ballast tanks，such as in a bulk carrier，may generate carbon monoxide
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
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
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
Y’s utterance in the following conversation exchange violates the maxim of__________.X:Who was that you were with last night Y:Did you know that you were wearing odd socks 《》（）A.qualityB.quantityC.relationD.manner
单选题The bypass valve on a self-contained breathing device should be opened if（）.Ayou are entering a space containing poisonous vaporsByou are entering a space containing explosive gasesCthe regulator of the breathing apparatus malfunctionsDthe face piece of the breathing device is too tight
单选题Gas masks（）.Ashould be worn while fighting a fireBcan be used in atmospheres deficient in oxygenCfilter contaminants from air that is to be breathedDmay be substituted for a self-contained breathing apparatus
单选题A self-contained breathing apparatus is used to（）.Amake underwater repairs to bargesBdetermine if the air in a tank is safe for menCenter areas that may contain dangerous fumes or lack oxygenDresuscitate an unconscious person
单选题Fire protection regulations for towing vessels require training in all of the following，EXCEPT（）.Aputting on a fireman's outfit，if the vessel is so equippedBdonning a self-contained breathing apparatus，if the vessel is so equippedCactivating the general alarm and reporting inoperative alarm systems and fire-detection systemsDrefilling and servicing all expended fire extinguishing equipment
填空题How many First Class return tickets can you get if you win the first prize?____ return tickets.
单选题The rated operating time of a self-contained breathing device may be reduced in actual use because of（）.Apressure differences in the atmosphereBthe length of the hose attached to the facepieceCthe physical exertion of the person wearing the deviceDspaces containing poisonous vapors
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?（）.AThe unit is working properlyBThe face mask is not sealed properlyCThe air bottle needs to be refilledDThe air supply hose has a leak
单选题You are on a multiple product tanker and carrying methyl acrylate，diethanolamine，and triethylamine. Which statement is TRUE? （）AMethyl acrylate may be loaded in a tank adjacent to diethanolamine but not triethylamineBThe heating coils to the cargo tank loaded with methyl acrylate must be blanked offCValve components made of aluminum，copper，or zinc may not be in contact with the cargoesDEach crew member working on deck must have an emergency escape breathing apparatus
单选题The function of the bypass valve on the self-contained breathing apparatus is to（）.Acontrol the pressure of the oxygen as it enters the bodyBallow the wearer to manually give himself oxygenCrelease excess heat which would otherwise cause the bottle to explodeDallow exhaled gases to pass outside the bottle
单选题Which emergency equipment should you keep near the towing bitts（）.AA self-contained breathing apparatusBA boat hook and a spanner wrenchCA fire ax and/or cutting torchDA Stokes litter basket
单选题Which emergency equipment should you keep near the towing bitts? （）AA self-contained breathing apparatus (SCBA)BA boat hook and a spanner wrenchCA fire ax and/or cutting torchDA Stokes litter basket
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 （）.Asufficient oxygen to sustain human lifeBan explosive mixture in the compartmentCa toxic atmosphere in the compartmentDAll of the above
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 （）.Ause self-contained breathing apparatusBuse various types of portable fire extinguishersCeffect a rescue in a smoke-filled space wearing breathing apparatusDAll of the above
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?（）ABecause carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause asphyxiationBBecause carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gasCBecause 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 gasDThis action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas
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（）.Aa gas mask certified by the Mine Safety and Health AdministrationBthe same self-contained breathing apparatus required with the fireman's outfitCan oxygen breathing apparatus，provided that the device has been inspected within three yearsDa portable ventilation system that will provide a complete change of air every three minutes