单选题Which condition indicates the air side fouling of an after-cooler on a turbocharged diesel engine?（）AAn increased air temperature differential between the cooler inlet and outletBA decrease in the air pressure differential across the coolerCExcessive condensate forming in the air boxDA decrease in the air temperature differential between the cooler inlet and outlet
单选题
Which condition indicates the air side fouling of an after-cooler on a turbocharged diesel engine?（）
A
An increased air temperature differential between the cooler inlet and outlet
B
A decrease in the air pressure differential across the cooler
C
Excessive condensate forming in the air box
D
A decrease in the air temperature differential between the cooler inlet and outlet
参考解析
解析：
暂无解析
相关考题：
What is the most usual reason for the fresh water-sea water heat exchanger fouling in the sea side?A.lube oil sludge accumulating in itB.dirt and scale etc , formed on the surfacesC.deformation of the tubes and the shell or the platesD.lube oil leakage into sea-water side
Which variable factor affects the initial lashing requirements aboard Ro-Ro vessels?A.Age of vehicle or cargo unitB.Size and weight of vehicle/cargo unitC.Reputation of shipper concerning condition of cargoD.Air pressure in the vehicles tires
A cardinal mark showing an uninterrupted quick-flashing white light indicates the deepest water in the area is on the ______.A.north side of the markB.west side of the markC.east side of the markD.south side of the mark
你想把引航员梯装在哪一舷？（）A、On which side must I rig the pilot ladder?B、On which side do you want the ladder rigged?C、On what side must I rig the pilot ladder?D、On which side do you want the gangway rigged?
A ship’s bottom is given a coating of （）which contains poison.A、varnishB、anti-fouling paintC、boottopping paintD、primer
On which side shall we get alongside the wharf?（）A、On port side .B、On right side.C、On left side.D、On deck.
单选题A ship’s bottom is given a coating of （）which contains poison.AvarnishBanti-fouling paintCboottopping paintDprimer
单选题Air blowing from the intake air filter of an operating air compressor indicates （）.Abroken inlet valvesBbroken discharge valvesCpulsations in the air distribution systemDoverloading of the air distribution system
单选题Which condition indicates that your radar needs maintenance?（）ASerrated range ringsBIndirect echoesCMultiple echoesDBlind sector
单选题The humidifier’s valve of air-condition should be （）, when the temperature is lower than 0℃.AdecreasedBincreasedCfixedDclosed
单选题Visual inspection of chrome-plated piston compression rings reveals a black ring face at the position of the cylinder liner portsThis condition indicates a ring which（）Ahas a crown-faceBexceeds wear limits through normal wearChas excessive blow-byDis in good condition
单选题A hot air start pipe indicates that there is （）.Ainefficient coolingBa leaking air start valveCa clogged drain valveDa leaking air bottle
单选题Exhaust temperature increases in all cylinders, the possible cause may be（） (1) increased scavenging air temperature (2) air in fuel pumps and fuel valves (3) fouling of air and gas passagesA(1)+(2)B(1)+(3)C(2)+(3)D(1)+(2)+(3)
单选题Which statement is TRUE concerning the gooseneck（）.AIt is a sailing maneuver which brings the vessel's head through the windBIt connects the boom to the mast and allows the boom to swing freelyCIt is a sailing condition where there is a loss of air flow over the sailsDNone of the above
单选题If over a period of weeks the air-box pressure of a turbo-charged, diesel engine, operating at full load, appears to be dropping off, the cause can be （）.Aopen air-box drainsBloss of cooling water to the diffuserCgradual fouling of the air filtersDimproperly timed exhaust valves
单选题In order to distribute the side pressures over a wide area of the cylinder walls and liners, which of the listed types of pistons are used in modem low pressure air compressors?（）ADifferentialBTrunkCBarrelDValve-in-head
单选题A list signal of one white light indicates that the vessel is （）.Aon an even keelBlisting about 1° to the side the light is displayed onClisting over 5° With the light displayed on the high sideDlisting，and the chutes should be directed to the side where the light is displayed
单选题Which condition is necessary for a substance to burn?（）AThe temperature of the substance must be equal to or above its fire pointBThe air must contain oxygen in sufficient quantityCThe mixture of vapors with air must be within the explosive rangeDAll of the above
单选题The（） only allows for adjustment of temperature in each room by the occupant manually controlling the air volume admitted.Acentral air condition systemBhigh velocity systemClow velocity systemDsingle duct system
单选题Under normal conditions, the quantity of air circulation becomes less and less.What is the reason?（）Adirty delivery ductsBtoo much refrigerantCthe fouling filtersDhigh temperature outside
单选题A cardinal mark showing an uninterrupted quick-flashing white light indicates the deepest water in the area is on the（）.Anorth side of the markBwest side of the markCeast side of the markDsouth side of the mark
单选题A diesel engine cooling water system with a pH factor of 30 indicates a condition of （）.Aslight acidityBslight alkalinityCexcessive alkalinityDexcessive acidity
单选题In an operating diesel engine, which of the following condition is an indication of a leaking air starting valve?（）Anoise coming from that air starting valveBcontinuous operation of the starting air compressorCzero air pressure in the air starting systemDoverheated starting air pipe to the cylinder head
单选题In a diesel engine cooling water system, a pH of 60 indicates a/an （）.Aslightly acidic conditionBslightly alkaline conditionCovertreatment of waterDneutral condition of water
单选题Which condition indicates that you are in a hurricane’s dangerous semicircle in the Northern hemisphere（）.AA backing windBA veering windCA northerDA strong，gusty wind
单选题A dazzling white burner flame in the boiler furnace indicates （）.Ano combustionBdeposits in the fuelCexcessive air in the fuelDcold fuel oil