更多"In North America the majority of th"的相关试题:
[单项选择]Accidental grounds in a shipboard electrical system must be repaired as soon as possible as they will （）
A. result in immediate power outages
B. damage circuit breakers
C. appear on the ground detection system
D. damage insulation and may cause outages
[单项选择]In a closed diesel engine freshwater cooling system, the amount of coolant flowing through the heat exchanger is controlled by the （）.
A. suction pressure regulator
B. thermostatic bypass valve
C. sea water temperature
D. water level in the expansion tank
[单项选择]Water allowed to accumulate in the hydraulic system oil will cause an oxidation process producing by- products which are normally （）.
A. gums, acids, and varnishes
B. removed by cellulose type filters
C. neutralized by oil additives
D. not removed by absorbent filters
[单项选择]SOLAS regulations require that the inert gas system shall be capable of delivering inert gas with an oxygen content of not more than what percentage?（）
A. 5%
B. 8%
C. 6%
D. 3%
[单项选择]Zinc rods are installed in the refrigeration system （）.
A. liquid strainer
B. liquid receiver
C. saltwater condenser
D. evaporator
[单项选择]Weather observations provided by each weather station include all of the following except（）.
A. temperature
B. visibility
C. predicted weather for the next twelve hours
D. barometric pressure and change in the last three hours
[单项选择]Sludge formation in a diesel engine lube oil system is caused by（）
A. carbonization of oils from the combustion chambers
B. emulsions of lube oil and water
C. coagulation of unburned fuel below the piston rings
D. all of the above
[单项选择]When it is necessary to open a refrigeration system for repairs and the system will be open for more than a few minutes, the open ends of the system should be （）.
A. dehydrated
B. purged
C. plugged
D. evacuated
[单项选择]In a combination chain and wire rope mooring system，the anchor chain is deployed at the anchor end of the line to（）.
A. increase fatigue life of the system
B. reduce the time to retrieve the line
C. increase the holding power
D. reduce the catenary
[单项选择]The car will be guided by a differential GPS system that corrects errors（）in global positioning satellite signals.
A. arising
B. rise
C. raise
D. arouse
[单项选择]An orifice-check valve placed in a hydraulic system is used to（）
A. regulate the fluid flow in either direction
B. restrict movement of hydraulic fluid in one direction, but allow free movement in the other direction
C. allow free movement of hydraulic fluid in both directions
D. allow a restricted fluid flow in one direction only
[单项选择]Because of the reduced （）in the distillation system, some of the sea water boils as it flows through the tubes of the evaporator.
A. pressure
B. temperature
C. density
D. volume
[单项选择]The purpose of the deck seal in an inert gas system is to prevent（）.
A. flammable vapors from entering machinery space
B. flue gas escaping to atmosphere
C. inert gas escaping to atmosphere
D. air entering inert gas system
[单项选择]当AP中配置SSID加密类型为WEP加密（密码为12345），MAC层认证方式为open-system，而客户端输入的密码为54321会出现哪些现象？（）
A. 客户端可以成功连接AP，但无法正常通信
B. 客户端可以成功连接AP，也可以正常通信，但数据报文为明文传输
C. 客户端会提示密码错误，要求重新输入
D. 客户端无法成功连接AP
[单项选择]Messages concerning weather conditions transmitted by radiotelephone are preceded by（）.
A. MAYDAY
B. PAN-PAN
C. SECURITE
D. SOS
[单项选择]The majority of automatic mooring winches are spur geared to improve the backward efficiency of the gear train for rendering（）
A. spur geared
B. screw geared
C. worm geared
D. belt driven
[单项选择]Propulsion of the vast majority of contemporary merchant ships (especially containerships and VLCCs) utilizes（） as prime mover.
A. gas turbine
B. diesel engine
C. steam engine
D. gasoline engine
[单项选择]Propulsion engines and the vast majority of auxiliary generator engines are designed to allow a generous through-flow of scavenge air in order to control （）
A. the lubricating oil consumption
B. the turbine blade temperature
C. the flow rate of fuel
D. scavenge air pressure
