更多"Fuel injectors used in heavy fuel o"的相关试题:
[单项选择]One engine manufacturer recommends heavy fuel oil should not be heated above 80℃ to 95℃ (176 ℉ TO 203℉) before purificationThis upper limit should be observed to ensure against（）
A. flattening of the bowl neoprene O-rings
B. operation within the explosive rang of the fuel
C. excessive purifier operating pressures
D. excessive oil viscosity
[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]
When centrifuging heavy fuel oil, an important factor to consider is the （）
(1) flow rate
(2) viscosity of the fuel oil
A. (1) only is correct
B. (2) only is correct
C. both (1) and (2) are correct
D. neither (1) or (2) are correct
[单项选择]The safe rate of bunkering heavy fuel oil is directly related to the （）.
A. type of fuel transfer pump aboard
B. temperature of the fuel oil being received
C. size of the fuel storage tanks ashore
D. distance from the fuel oil storage tanks ashore
[单项选择]When the heavy fuel oil is heated to achieve the viscosity of 10-15 cst, may occur.To avoid this, a system is used in most occasions（）
A. boiling and cavitations; low temperature
B. boiling and cavitations; pressurized
C. leaking and boiling; low temperature
D. leaking and boiling; pressurized
[单项选择]When preparing a ship for heavy weather，fuel oil day tanks should be（）.
A. pumped overboard to calm the seas
B. drained to the lower hull to reduce free surfaces
C. filled to ensure that sufficient fuel oil is available during a lengthy emergency
D. partially drained to increase free surfaces in order to reduce motions
[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]When restarting a heavy fuel diesel engine that has been stopped for some time, the engine should（）
A. increase the starting air pressure
B. use a higher than normal cranking speed
C. increase the fuel injection pressure
D. use a fuel having a lower ignition temperature
[单项选择]Heavy fuel oils generally have an upper average ash content of 0~1% by weight.Which of the following conditions could be expected if the ash content increase above this amount?（）
A. Glazing of the cylinder liners
B. Increase valve wear
C. Excessive oil pumping
D. Increase fuel consumption
[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]
The sequence of parts in a generally used fuel oil supply system for a main engine is （）
(1)tanks in the double bottom
(2)centrifuges
(3)service tank
(4)settling tank
(5)viscosity regulator
A. (1)-(2)-(4)-(3)-(5)
B. (1)-(4)-(2)-(3)-(5)
C. (1)-(3)-(2)-(4)-(5)
D. (1)-(5)-(4)-(2)-(3)
[单项选择]Heavy fuel oils when spilled are（）.
A. more harmful to sea life than lighter oils
B. easier to clean up than lighter refined oils
C. less harmful to sea life than lighter oils
D. not a real threat to marine life
[单项选择]Fuel oil transfer systems used onboard diesel propelled vessels are required to have （）.
A. two fuel oil transfer pumps provided where one is to be independent of the main engine
B. two fuel oil transfer pumps, with a combined capacity exceeding the maximum consumption of the main engine
C. engine driven transfer pumps and only used in constant speed applications
D. the capacity of the engine driven pump exceed the consumption rate of the engine to which it is attached
[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]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
[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]P2板燃油流量指示系统上的FUEL USED RESET电门，其作用是（）
A. 选择正确的燃油密度
B. 选择正确的燃油温度
C. 选择燃油流量，已使用燃油，和复位燃油使用计数器
D. 只是复位已使用燃油
[单项选择]Diesel engine fuel oil contamination often results in （）
A. governor malfunctions
B. fuel injection system malfunctions
C. high cylinder lube oil temperatures
D. low intake temperatures
[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
