更多"Portable foam type fire extinguishe"的相关试题:
[单项选择]Foam-type portable fire extinguishers are most useful in combating fires involving().
A. solid materials such as wood or bales of fiber
B. inflammable liquids
C. electrical equipment
D. metallic solids
[单项选择]Foam-type portable fire extinguishers are more usefull in combating fires involving().
A. solid materials such as wood or bales of fiber
B. inflammable liquids
C. electrical equipment
D. metallic solids
[单项选择]Portable carbon dioxide fire extinguishers should be sent ashore to be recharged ().
A. when the remaining charge volume is less than 90 percent of the required VOLUME
B. at each inspection for certification
C. at each annual inspection
D. when the weight loss exceeds 10% of weight of charge
[单项选择]Portable CO2 fire extinguishers should NOT be used to inert a space containing flammable liquids due to the danger of().
A. the CO2 being inhaled by personnel
B. reflash of burning liquids
C. vapor condensation on the extinguisher
D. the discharge causing a static spark
[单项选择]A foam-type portable fire extinguisher is most useful in fighting a fire in().
A. generators
B. oil drums
C. the bridge controls
D. combustible metals
[单项选择]Portable fire extinguishers must be provided for the cargo tank area of an unmanned tank barge().
A. only when fully loaded
B. if one or more tanks are full
C. when transferring cargo
D. only when the barge is being towed
[单项选择]Which types of portable fire extinguishers are designed for use on electrical fires?()
A. Dry chemical and carbon dioxide
B. Foam (stored pressure) and soda-acid
C. Carbon dioxide and foam (stored pressure)
D. Dry chemical and soda-acid
[单项选择]All portable fire extinguishers must be capable of being().
A. carried by hand to a fire
B. carried or rolled to a fire
C. recharged in the field
D. used on class "B" fires
[单项选择]What is an advantage of using foam in fire fighting?()
A. It is MOST effective on very hot oil fires where the temperatures of the liquid exceed 100°C (212°F)
B. Most foams can be used with dry chemicals to attack a fire by two methods
C. Foam is effective on combustible metal fires
D. Foam can be made with seawater or fresh water
[单项选择]A foam-type portable fire extinguisher would be most useful in combating a fire in().
A. solid materials such as wood or bales of fiber
B. flammable liquids
C. a piece of electrical equipment
D. combustible metallic solids
[单项选择]A portable foam (stored-pressure type) fire extinguisher would be most useful in combating a fire in().
A. generators
B. oil drums
C. the bridge controls
D. combustible metals
[单项选择]A portable foam fire extinguisher is placed in operation by()
A. turning it upside down
B. pressing the foam lever
C. squeezing the grip handle
D. opening the hose valve
[单项选择]Foam extinguishes a fire by().
A. shutting off the air supply
B. cooling the fule to below ignition temperature
C. dispersing the fuel
D. removing the source of ignition