更多"A tank has been sealed and unventil"的相关试题:
[单项选择]A tank which has been sealed for a long period of time can be dangerous because （）.
A. steel surfaces consume oxygen by rusting
B. sealed tanks usually form a vacuum
C. moisture condenses in the tank, displacing the oxygen
D. most tank coatings give off poisonous vapors in the presence of moisture
[单项选择]Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an（）.
A. Orsat apparatus
B. flame safety lamp
C. Halide torch
D. combustible gas indicator
[单项选择]Before welding can be done in a tank that has carried petroleum products，a certificate must be obtained from（）.
A. the Customs
B. the Register Bureau of Shipping
C. the Shipyard Fire Department
D. a certified gas chemist
[单项选择]Before welding in a tank that has carried petroleum products，the tank must be certified by （）.
A. the Coast Guard
B. the ABS
C. the shipyard fire department
D. a certified marine chemist
[单项选择]Our ship has not been to shipyard for a long time, the fouling on the ship’s hull greatly decreases her（）.
A. resistance
B. weight
C. speed
D. displacement
[单项选择]When inspecting a tank barge to see that it has all the required fire extinguishers and other safety items aboard，which of the following is the best source for determining what is required? （）
A. The supervisor in charge of the dock to which the barge is tied up
B. Part 38 of the Rules and Regulations for Tank Vessels
C. The Certificate of Inspection of the barge
D. The local fire marshal
[单项选择]Your ARPA has been tracking a target and has generated the targets course and speed.The radar did not receive a target echo on its last two scans due to the weather.What should you expect under these circumstances（）.
A. The ARPA will generate data as if the target was still being tracked by radar
B. The ARPA will give an audible and/or visual lost target alarm
C. The ARPA will generate data based on sea return echoes from the vicinity where the target was lost
D. The ARPA has lost all memory of the target and must recompute the target data
[单项选择]After a person has been revived by artificial respiration，he should be（）.
A. walked around until he is back to normal
B. given several shots of whiskey
C. kept lying down and warm
D. allowed to do as he wishes
[单项选择]A diesel generator has just been paralleled with an AC turbo-generator, but the load can not be properly divided.This could be caused by（）
A. an incorrect diesel generator governor speed droop adjustment
B. a faulty reverse power relay within the main circuit breaker assembly
C. unsynchronized isochronous load distribution adjustments
D. a different speed setting on each unit
[单项选择]An access list has been designed to prevent HTTP traffic from the Accounting Department from reaching the HR server attached to the Holyoke router. Which of the following access lists will accomplish this task when grouped with the e0 interface on the Chicopee router（）。
A. permit ip any any deny tcp 172.16.16.0 0.0.0.255 172.17.17.252 0.0.0.0 eq 80
B. permit ip any any deny tcp 172.17.17.252 0.0.0.0 172.16.16.0 0.0.0.255 eq 80
C. deny tcp 172.17.17.252 0.0.0.0 172.16.16.0 0.0.0.255 eq 80 permit ip any any
D. deny tcp 172.16.16.0 0.0.0.255 172.17.17.252 0.0.0.0 eq 80 permit ip any any
[单项选择]She has been working hard day and night during these years（）she could pay for the lost necklace.
A. in order that
B. as long as
C. the moment
D. because
[单项选择]If there has been a fire in a closed unventilated compartment it may be unsafe to enter because of （）.
A. unburned carbon particles
B. excess nitrogen
C. a lack of oxygen
D. excess hydrogen
[单项选择]When an oil fire has been extinguished, the surface of the oil should be kept covered with foam to prevent （）.
A. air from contacting the oil vapors
B. permitting re-ignition boiling of the heated oil
C. spontaneous combustion below the oil surface
D. toxic fumes from escaping to the surface
[单项选择]If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase（）
A. inspection covers should not be opened until the engine has cooled
B. ventilation system should be continued in operation for one hour for cooling
C. scavenge pump should be immediately secured to prevent loss of lube oil
D. explosion covers should be opened slightly to provide extra ventilation
[单项选择]A carbon dioxide fire extinguisher has been partially discharged, and should be immediately （）.
A. tagged and restowed properly in its rack
B. weighed and the charge loss recorded
C. given to the chief engineer for recharging
D. tagged "empty" and stowed separately from charged extinguishers
[单项选择]When fueling has been completed（）.
A. the fuel tank fill pipe should be left open to allow vapors to vent from the tank
B. the engine should be started immediately to prevent vapor lock in the fuel line
C. all hatches should be opened and all compartments should be ventilated
D. open the fuel line and drain a small amount of gasoline into the bilge to clear the line of sediment
