更多"Fuel oil day tanks for diesel engin"的相关试题:
[单项选择]Modern marine diesel engines using mechanical fuel injection, operate on a combustion cycle which is（）
A. a combination of constant volume and constant pressure
B. a combination of constant temperature and constant pressure
C. entirely constant pressure
D. entirely constant volume
[单项选择]Fuel oil tanks must be fitted with （） that can be closed rapidly and remotely in the event of an emergency such as a fire.
A. stop valves
B. non-return valves
C. quick closing valves
D. relief valves
[单项选择]Permitting a diesel engine fuel oil day tank to run dry can cause （）
A. overheated injection pumps
B. water condensation in the cylinders
C. fuel dilution of the lube oil
D. air in the fuel system
[单项选择]When separating fuel oil in oil separator, the separating quantity is（） of the real quantity.
A. 100%
B. 80%
C. 1/2
D. 1/3
[单项选择]The fuel from the bunker tanks must be treated by before entering the service tanks（）, from where the fuel enters（）
A. centrifugal separators; the engine cylinder
B. oily water separators; the engine cylinder
C. oily water separators; the fuel supply system
D. centrifuges; the fuel supply system
[单项选择]Injectors for use with heavy fuel oil must be cooled by either water or light oil to （）
A. prevent heat corrosion to internal components
B. increase fuel delivery rate and economy
C. prevent pre-ignition
D. avoid carbonization of the nozzle tips
[单项选择]A diesel engines crankcase oil level is found to be too high√ You should suspect that （）.
A. the engine was over filled
B. there might be a fuel leak
C. there might be a water leak
D. all of the above
[单项选择]Machinery driving fuel oil transfer and fuel oil service pumps must be fitted with a remote means of stopping the machinery from （）.
A. within the space concerned
B. outside the space concerned
C. the throttle station
D. within the fire room
[单项选择]Fuel injected into a diesel engines cylinder is ignited by （）.
A. the heat compressed fuel/air mixture in the cylinder
B. the fuel igniter
C. the fuel injector
D. the fuel pump
[单项选择]Why is it important for fuel oil tanks not to be topped off at the inner bottom level when loading on a cold day?（）
A. Increased viscosity of the product needs higher loading pressure, which increases the chances of a spill
B. Air pockets may cause the fuel to bubble out of the ullage hole
C. The temperature rise of the fuel will cause an overflow
D. Fueling valve may become stuck closed and cause the fuel oil to spill before the valve can be opened
[单项选择]Fuel oil is regularly transferred to the day tank in order to （）
A. allow impurities to settle out of the fuel
B. allow air to escape from the fuel
C. make fuel available for immediate use
D. all of the above
[单项选择]In a diesel engine, fuel must be broken up into a spray of fine droplets to （）.
A. increase its quality
B. obtain complete burning
C. reduce its weight
D. all of the above
[单项选择]The quality of the fuel oil and lube oil （）, Im afraid.
A. has much to do with the operation of the engine and its life
B. have much to do with the operation of the engine and its life
C. has much doing with the operation of the engine and its life
D. have much doing with the operation of the engine and its life
[单项选择]Where tanks are arranged for either oil or ballast （） must be fitted in the pipe so that only the ballast main or the oil transfer main connected to the tank.
A. a sea water chest
B. a change-over chest
C. a buffer tank
D. a three-way valve
[单项选择]Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce（）.
A. cold corrosion of the nozzles
B. fuel viscosity for better atomization
C. carbon accumulation on the nozzles
D. fuel detonation in the cylinders
[单项选择]
When fuel oil is accidentally missed with lube oil which of the following processes can be used to separate them?（）
Ⅰ.filtering
Ⅱ.settling
A. Ⅰ only
B. Ⅱ only
C. either Ⅰ or Ⅱ
D. neither Ⅰ or Ⅱ
[单项选择]In a commonly used fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.
A. a service tank
B. a settling tank
C. an expansion tank
D. a double bottom tank
[单项选择]In a typical fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.
A. a service tank
B. a collecting tank
C. a sump
D. a settling tank
