更多"The mode of control employed by an "的相关试题:
[判断题]GPRS网络中的Opera对ion Mode I有Gs接口。
[单项选择]In the emergency alarm signals, if the alarm or whistle two long sounds followed by one short sound for 1 minute, it is the （） emergency.
A. fire fighting
B. leakage blocking
C. abandon ship
D. integration
[填空题]站控画面Alarm一栏出现红色并闪烁，说明有新报警产生，如果Alarm一栏出现红色不闪烁，说明（）；如果Comms一栏出现浅蓝色，则表示有（）。
[名词解释]SELV回路（SELV circuit）
[单项选择]The radiotelegraph alarm signal is（）.
A. SOS sent three times
B. ten one-second dashes with a four-second interval between them
C. twelve four-second dashes with a one-second interval between them
D. twelve one-second dashes with a short interval between them
[单项选择]An alarm device inserted between the deaerating tank and the expansion tank can notify the on-watching crew that （）
A. the expansion tank is lack of water
B. the expansion tank is over flowing
C. there is something wrong with the cooling system
D. there is something wrong with the engine
[单项选择]The radiotelegraph alarm signal may be used to announce（）.
A. that a distress message will follow
B. a request for assistance in searching for a man overboard
C. an urgent warning about a cyclone
D. All of the above
[单项选择]Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.
A. temperature
B. pressure
C. engine speed
D. all of the above
[单项选择]The alarm signal for engine room catching fire is a blast of random bell follow by （）
A. two knock
B. three knocks
C. four knocks
D. five knocks
[名词解释]System management mode
[单项选择]You hear the general alarm bells and ships whistle sound for over 10 secondsTraditionally, this is the signal for （）.
A. abandon ship
B. dismissal from drills
C. fire and emergency
D. lower lifeboats
[单项选择]When the general alarm is sounded continuously, the engine room personnel should （）.
A. proceed to their man overboard stations
B. start the fire pump
C. put on lifejackets and go to their abandon ship stations
D. secure the propulsion diesel engines and evacuate the engine room
[单项选择]A crew member reports that the high-pressure alarm light of a low-pressure CO2 fixed fire extinguishing system is illuminated. The most probable cause of this condition would be that（）.
A. an air leak has developed in the tank
B. the tank cooling system has malfunctioned
C. the pilot cylinder discharge valve is leaking
D. an excessive amount of insulation has been installed on the tank and piping
[单项选择]Fire alarm system thermostats are actuated by（）.
A. smoke sensors
B. the difference in thermal expansion of two dissimilar metals
C. pressure loss due to air being heated
D. an electric eye which actuates when smoke interferes with the beam
[单项选择]If the overflow tank high-level alarm sounds while the fuel oil tanks are being topped off, the engineer should （）.
A. close the static leg filling valve
B. close the overflow tank falling valve
C. reduce the fuel oil pumping rate
D. stop the fuel oil pumping operation
[单项选择]Capacitance is the property of an electric circuit opposing a change in the （）
A. current in the circuit
B. voltage in the circuit
C. inductance in the circuit
D. resistance in the circuit
