更多"A diesel driven emergency generator"的相关试题:
[单项选择]An emergency generator, driven by an internal combustion engine, shall be tested under load for a minimum of 2 hours at least once every （）
A. week
B. 2 weeks
C. month
D. 3 months
[单项选择]An emergency diesel generator should automatically shut down in the event of （）
A. dangerous over-speeding
B. a loss of lube oil pressure
C. activation of the fixed CO2 system for the emergency generator space
D. all of the above
[单项选择]The emergency generator or emergency battery is connected to（） on most large ships.
A. distribution boards
B. section boards
C. emergency switch boards
D. main switch boards
[单项选择]Standby or emergency diesel generator day tanks should always be kept full to reduce the possibility of（）
A. sediment contamination
B. fuel filter clogging
C. moisture formation
D. inadequate transfer pump suction head
[单项选择]Each emergency generator on a mobile offshore drilling unit，when tested，must be run under a full load for at least（）.
A. one hour
B. two hours
C. ten hours
D. four hours
[单项选择]Emergency generator is installed on board mainly to （）
A. connect to the busbar when the load increasing
B. supply power specially to charging panel
C. be put into operation during the ship arriving at or leaving port
D. ensure the power supply to critical equipment after the main switchboard out of power
[单项选择]On a ship，each emergency generator must be tested at least once each（）.
A. week
B. month
C. three months
D. six months
[单项选择]It （） for an emergency generator to require paralleling.
A. is usual
B. is not usual
C. is necessary
D. is not impossible
[单项选择]Crankcase explosions in propulsion diesel result from（）
A. the splashing of lubrication oil by the crankshaft
B. the dilution of crankcase oil with particles of combustion
C. broken fuel lines spraying oil on the crankcase
D. the ignition of unburned fuel and air in the crankcase
[单项选择]The highest pressure in any closed diesel engine freshwater cooling system is at the （）.
A. jacket water outlet
B. expansion tank inlet
C. heat exchanger inlet
D. cooling water pump outlet
[单项选择]Piston compression rings used in a diesel engine function to （）
A. transfer heat from the cylinder to the piston
B. scrape oil from the sides of the piston
C. seal the combustion space from the crankcases
D. prevent any piston contact with the cylinder liner
[单项选择]If the diesel fuel vapors present are within the flammable range （）.
A. the vapor air mixture is too rich to burn
B. an explosion may occur if a source of ignition is present
C. the vapor air mixture is too lean to bum the upper explosive
D. limit has been exceeded
[单项选择]In a diesel engine lube oil system, which of the following parts should be lubricated first?（）
A. Camshaft beatings
B. Main bearings
C. Piston crowns
D. Cylinder walls
[单项选择]The marine diesel engine is a type of diesel engine used on ships The （） of its operation is not very difficult to understand.
A. principle
B. principal
C. cause
D. case
[单项选择]Diesel oil may be used to cool （） of a diesel engine.
A. cylinders
B. exhaust valves
C. pistons
D. fuel valves
[单项选择]The storm prevented me（）.
A. to go out
B. to going out
C. from being out
D. from going out
[单项选择]Oxygen corrosion in auxiliary boilers is prevented by treating the boiler feed tank with either sodium （）
A. sulfite or hydrazine
B. sulfite or hygroscopic sulfite
C. bromide or hydrazine
D. bromide or hygroscopic sulfite
[单项选择]Anchors are prevented from running out when secured by the（）.
A. brake
B. devil's claw
C. pawls
D. All of the above
[单项选择]Rudder motion is prevented from exceeding the movement of the steering wheel by the（）
A. return springs
B. six-way valve
C. follow-up gear
D. differential gear
