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A fixed carbon dioxide extinguishing system for a machinery space，designed WITHOUT a stop valve in the line leading to the protected space，is actuated by ______.
A.one control
B.two controls
C.three controls
D.none of the above
参考答案
更多 “ A fixed carbon dioxide extinguishing system for a machinery space，designed WITHOUT a stop valve in the line leading to the protected space，is actuated by ______.A.one controlB.two controlsC.three controlsD.none of the above ” 相关考题
考题
In the event of fire in a machinery space，______.A.the fixed carbon dioxide system should be used only when all other means of extinguishment have failedB.the fixed carbon dioxide system should be used immediately，as it is the most efficient means of extinguishmentC.water in any form should not be used as it will spread the fireD.the space should be opened 5 minutes after flooding CO2 to prevent injury to personnel
考题
Which statement concerning carbon dioxide is FALSE ________．A.It displaces the oxygen in the airB.It cannot be seenC.It cannot be smelledD.It is safe to use near personnel in a confined space
考题
An advantage of an ABC dry chemical over a carbon dioxide fire extinguisher is ______.A.lack of toxicityB.the multipurpose extinguishing abilityC.burn-back protectionD.cooling ability
考题
Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed spaces, such as in a pumproom, provided that the ______.A.persons in the space wear gas masksB.persons in the space wear damp cloths over their mouths and nostrilsC.ventilation system is secured and all persons leave the spaceD.ventilation system is kept operating
考题
Deep-fat cooking equipment shall be fitted with the following:（）A、An automatic or manual fixed extinguishing system tested to an appropriate standardacceptable to the OrganizationB、Controls for manual operation of the fire-extinguishing system which are clearlylabeled for ready use by the crewC、Arrangements for automatically shutting off the electrical power upon activation of thefire-extinguishing systemD、an alarm for indicating operation of the fire-extinguishing system in the galley wherethe equipment is installed
考题
单选题An advantage of an ABC dry chemical over a carbon dioxide extinguisher is（）.A
lack of toxicityB
the multipurpose extinguishing abilityC
burn-back protectionD
cooling ability
考题
单选题The remote control for a fixed fire extinguishing system should be（）.A
painted red and labeledB
concealed from the crewC
protected by plexiglassD
padlocked
考题
单选题The danger associated with using carbon dioxide in an enclosed space is（）.A
frostbiteB
skin burnsC
asphyxiationD
an explosive reaction
考题
单选题For which of the listed classes of fire combinations would carbon dioxide be most suitable as the extinguishing agent （）.A
Class A and class BB
Class B and class CC
Class A and class CD
Class C, class D, and class E
考题
单选题Carbon dioxide flooding system is used for extinguishing fires because it reduces the concentration of oxygen in the air to（）.A
flashing pointB
combustion pointC
auto-ignition pointD
lower explosive limit
考题
单选题According to the passage, the greatest part of the solar energy that reaches the Earth is _____.A
reflected back to space by snow and iceB
concentrated at visible wavelengthsC
absorbed by carbon dioxide moleculesD
absorbed by atmospheric water vapor
考题
单选题In order to release CO2 to the machinery spaces from a fixed fire extinguishing system, you must（）.A
actuate an alarm and open the engine room control valveB
actuate an alarm and open the engine room CO2 releasing valveC
open the engine room control valve and shut off engine room ventilation fansD
open the engine room control valve and then the CO2 releasing valve
考题
多选题Deep-fat cooking equipment shall be fitted with the following:（）AAn automatic or manual fixed extinguishing system tested to an appropriate standardacceptable to the OrganizationBControls for manual operation of the fire-extinguishing system which are clearlylabeled for ready use by the crewCArrangements for automatically shutting off the electrical power upon activation of thefire-extinguishing systemDan alarm for indicating operation of the fire-extinguishing system in the galley wherethe equipment is installed
考题
单选题Controls for a fixed carbon dioxide system shall be mounted（）.A
directly outside the space protected by the systemB
as near the gas cylinders as possibleC
in the pilothouseD
on the main deck near the bow
考题
单选题A fixed carbon dioxide extinguishing system for a machinery space，designed WITHOUT a stop valve in the line leading to the protected space，is actuated by（）.A
one controlB
two controlsC
three controlsD
none of the above
考题
单选题Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed space, such as in the pumproom, provided that the（）.A
persons in the space wear gas masksB
persons in the space wear damp cloths over their mouths and nostrilsC
ventilation system is secured and all persons leave the spaceD
ventilation system is kept operating
考题
单选题What is NOT a characteristic of carbon dioxide fire-extinguishing agents?（）A
Effective even if ventilation is not shut downB
Will not deteriorate in storageC
Non-corrosiveD
Effective on electrical equipment
考题
单选题Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent?（）A
Carbon dioxide is corrosive when exposed to fireB
Carbon dioxide should be applied slowly to a large engine room fireC
Its total cooling effect is far greater than waterD
Its smothering effect is excellent for class B fires
考题
单选题Which types of portable fire extinguishers are designed for use on electrical fires?（）A
Dry chemical and carbon dioxideB
Foam (stored pressure) and soda-acidC
Carbon dioxide and foam (stored pressure)D
Dry chemical and soda-acid
考题
多选题On what conditions may an exemption certificate，exempting from the requirement to install a fixed fire extinguishing system in a cargo space，be issued？（）AThe ship is constructed and solely intended for carriage of ore， coal， grain， unseasoned timber， non-combustible cargoes or cargoes which according to the Administration constitute a low fire riskBSteel hatch covers and effective means of closing all ventilators and other openings to the cargo space are fittedCA fixed deck foam system is be fitted in lieu of the cargo space extinguishing systemDThe vessel is less than 10 000 gross tonnage
考题
单选题After extinguishing a paint locker fire using the fixed CO2 system，the next action is to have the space（）.A
opened and burned material removedB
left closed with vents off until all boundaries are coolC
checked for oxygen contentD
doused with water to prevent reflash
考题
单选题While you are working in a space，the fixed CO2 system is accidentally activated．You should（）.A
Secure the applicators to preserve the charge in the cylindersB
Continue with your work as there is nothing you can do to stop the flow of CO2C
Retreat to fresh air and ventilate the compartment before returningD
Make sure all doors and vents are secured
考题
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
考题
单选题The supply of carbon dioxide used in the fixed extinguishing system aboard a cargo vessel MUST be at least sufficient for（）.A
all the spaces of a vesselB
all cargo spacesC
the engine room and largest cargo spaceD
the space requiring the largest amount
考题
单选题Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed spaces，such as in a pumproom，provided that the（）.A
persons in the space wear gas masksB
persons in the space wear damp cloths over their mouths and nostrilsC
ventilation system is secured and all persons leave the spaceD
ventilation system is kept operating
考题
单选题On a ship，a fixed carbon dioxide or other approved system must be installed（）.A
where oil or chemical drums are storedB
in all battery storage locationsC
in paint lockersD
in all of the above locations
考题
单选题Where foam extinguishing systems are provided on a ship，each machinery flat in the protected space must have a(n)（）.A
coamingB
alarmC
drainD
fire sensor
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