更多"Increasing differential pressure of"的相关试题:
[单项选择]An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.
A. restriction in refrigerant piping
B. air and non-condensable gases in the condenser
C. water in the refrigerant
D. flooding back of liquid refrigerant from the evaporator
[单项选择]The fuel oil pressure and forced draught pressure should be matched to ensure good combustion with a full steady flameIn the sentence the word “match” means （）
A. join with
B. mix
C. be equal to
D. be constant
[单项选择]An increased pressure differential between the inlet and outlet of a strainer usually indicates the strainer is （）
A. holed
B. fouled
C. clean
D. dry
[单项选择]The pressure differential across a diesel engine lube oil system duplex filter should be checked to （）
A. determine the need for filter cleaning
B. measure any change in oil viscosity
C. prevent damage to the filter
D. determine the need for batch filtration
[单项选择]For a L√Opurifier, if the back pressure of the oil outlet is too high, the interface between oil and water in the bowl will （）.
A. be interrupted
B. move downwards
C. move outwards
D. retain original position
[单项选择]The minimum fuel oil delivery pressure required for diesel engine injection depends primarily on the（）
A. degree of cylinder air turbulence
B. firing pressure in the engine
C. quality of fuel to be injected
D. duration of the ignition delay period
[单项选择]Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an （）.
A. overspeed trip
B. audible/visual alarm
C. the ships/boats general alarm
D. reserve oil storage tank
[单项选择]The oil pressure and flow from each bearings can be checked when（）
A. the lubricating pumps are stopped and the access doors are opened
B. the lubricating pumps are running and the access doors are opened
C. the engine is running and the access doors are closed
D. the engine is stopped and the access doors are closed
[单项选择]Oil pressure in the lubrication system is （） the static sea water head to ensure that sea water （） the stem-tube.
A. lower than；can lubricate
B. lower than；can cool
C. higher than；can enter
D. higher than ；cannot enter
[单项选择]Oil pressure in the lubrication system is（）than the static sea water head to ensure that sea water cannot enter the sterntube in the event of seal failure.
A. higher
B. lower
C. very higher
D. very lower
[单项选择]Whether using a centrifuge or a simple filter, oil cleaning and filtration will be the most effective when the oil is at a （）.
A. high temperature and a high viscosity
B. high temperature and a low viscosity
C. low temperature and a high viscosity
D. low temperature and a low viscosity
[单项选择]（APS2000）“APU LOW OIL PRESSURE”灯何时亮是正常的（）
A. APU电门放在"ON"位而APU还没有工作时
B. APU关车后
C. APU起动期间滑油压力上升到正常之前
D. 任何时候亮都是不正常的
[单项选择]A dirty diesel engine oil filter element can best be detected by （）.
A. visual inspection of the elements
B. the pressure drop across the filter
C. high lube oil sump temperature
D. decrease in oil viscosity from the filter
[单项选择]To determine if the lube oil filter elements need changing, （）.
A. open the filter and inspect the elements
B. check the lube oil pump discharge pressure
C. check the lube oil header pressure
D. check the pressure drop across the filter
[单项选择]A dirty fuel oil filter element can be detected by （）
A. Visual inspection of the element
B. the pressure drop cross the filter
C. high fuel oil tank temperature
D. increase flow rate from the filter
[单项选择]A lube oil filter can be used to remove most contaminants from lube oilA contaminant which will remain in the lube oil after filtering is （）.
A. acid
B. fuel oil
C. sediment
D. water
[单项选择]
A dirty fuel oil filter is can be detected by （）
Ⅰ.fuel oil analysis
Ⅱ.observing the pressure drop across the filter
A. Ⅰonly
B. Ⅱonly
C. eitherⅠorⅡ
D. neitherⅠnor
[单项选择]High pressure and low pressure alarms must be tested（）.
A. no earlier than 24 hours prior to loading
B. no later than 24 hours prior to loading
C. anytime prior to loading
D. weekly
[单项选择]The vapor pressure of a gas is the pressure necessary to keep it in a(n)（）.
A. soluble state
B. solid state
C. liquefied state
D. inert state
