更多"Which extinguishing agent is NOT re"的相关试题:
[单项选择]Which extinguishing agent is recommended in the Chemical Data Guide for use on a carbon disulfide fire?（）
A. Alcohol foam
B. Dry chemical
C. Chemical foam
D. Water fog
[单项选择]An extinguishing agent which effectively cools，dilutes combustible vapors，removes oxygen，and provides a heat and smoke screen is（）.
A. carbon dioxide
B. Halon 1301
C. dry chemical
D. water fog
[单项选择]Which extinguishing agent is effective in combating an isoprene fire?（）
A. Dry chemicals
B. CO2
C. Foam
D. All the above
[单项选择]Which extinguishing agent will cool down a heated bulkhead in the least amount of time?（）
A. Water stream
B. Water fog or apray
C. Steam
D. Dry chemical
[单项选择]Which extinguishing agent is most effective on a mattress fire?（）
A. CO2
B. Foam
C. Dry Chemical
D. Water
[单项选择]Which fire extinguishing agent has the greatest capacity for absorbing heat?（）
A. Water
B. Foam
C. Dry chemical
D. Carbon Dioxide
[单项选择]Which extinguishing agent is the best for use on electrical fires?（）
A. Foam
B. CO2
C. Dry chemical
D. Water fog
[单项选择]Which extinguishing agent is best for use on a magnesium fire?（）
A. Water
B. Sand
C. CO2
D. Dry chemical
[单项选择]Which set of commands is recommended to prevent the use of a hub in the access layer?（）
A. switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security maximum 1
B. switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security mac-address 1
C. switch(config-if)#switchport mode access switch(config-if)#switchport port-security maximum 1
D. switch(config-if)#switchport mode access switch(config-if)#switchport port-security mac-address 1
[单项选择]Which fire extinguishing agent can NOT be used on an ethylenediamine?（）
A. Water foam
B. Dry chemical powder
C. Water fog
D. Alcohol foam
[单项选择]Water is a very effective fire extinguishing agent because it（）
A. will remove all the toxic fumes from the air
B. has the greatest cooling ability
C. will leave no harmful residue
D. completely removes combustible vapors from the air
[单项选择]As an extinguishing agent,foam（）.
A. couducts electricity
B. should be directed at the base of the fire
C. is most effective on burning gases which are flowing
D. extinguishes by cooling oil fires blow ignition temperature
[单项选择]Any extinguishing agent used on a Class C fire must have which important property?（）
A. Cooling ability
B. Leaves no residue
C. Penetrating power
D. Nonconductivity
[单项选择]Any extinguishing agent used on a Class “C” fire must have which important property? （）
A. Cooling ability
B. Leaves no residue
C. Penetrating power
D. Nonconductivity
[单项选择]What method of extinguishing fire in a hatch is the best to minimize damages to the cargoes?（）.
A. Foam
B. CO2
C. Water
D. All of the above
[单项选择]When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter?（）
A. cold fuel oil
B. low fuel oil pressure
C. low atomizing steam pressure
D. water in the fuel oil
[单项选择]On an electro-hydraulic steering gear, which of the listed devices will keep the rudder from over-traveling the bridge signal?（）
A. Rudder angle indicator
B. Follow-up gear
C. Electric transmitter
D. Rudder angle limit switch
[单项选择]
When a hydraulic vane pump is working, which of the following is in contact with the vanes?（）
(1) the rotor
(2) the internal surface of the housing
(3) the external surface of the housing
A. (1) only
B. (2) only
C. (1) and (2)
D. (1), (2) and (3)
