A、pressure differences in the atmosphere
B、the length of the hose attached to the facepiece
C、the physical exertion of the person wearing the device
D、spaces containing poisonous vapors
更多“The rated operating time of a self-contained breathing device may be reduced in actual use because of（）.”相关的问题
A、the CIR rate of the lowest speed connection multiplied by the num ber of circuits B、the CIR rate of the lowest speed connection C、the CIR rate of the highest speed connection D、the sum of all the CIRs divided by the number of connections
A、Reduce the pumping rate by closing the deck filling valve B、Close all overflow valves C、Place 5 gallon containers under all flange connections in the fuel line D、Reduce the pumping rate and sound tanks frequently as the level rises
A、expansion space to leave in a tank B、flash point at which the fuel will burn C、temperature to which the fuel must be heated D、rate at which the fuel can be pumped during transfer operations
A、expansion space to leave in a tank B、flash point at which the fuel will burn C、temperature to which the fuel must be heated D、rate at which the fuel can be pumped during transfer operations
A、the previous refresh rate and the new refresh rate applied. B、the method that was used to access the display properties to change the refresh rate. C、all the refresh rates that were tested. D、the color resolution the user requested as well as the refresh rate.
A、the previous refresh rate and the new refresh rate applied. B、the method that was used to access the display properties to change the refresh rate. C、all the refresh rates that were tested D、the color resolution the user requested as well as the refresh rate.
A、Reduce the loading rate B、Notify the engine room of the procedure C、Maintain communications with the dock man D、Give the operation your undivided attention
A、at one fourth the demurrage rate B、at one third the demurrage rate C、at half the demurrage rate D、at the demurrage rate
A、During operation at low speed B、During operation at rated speed, but low power output C、During acceleration D、All of the above
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