单选题Diesel engine starting difficulties due to cold intake air temperatures, can be overcome by using a/an（）Aincrease in starting air pressureBincrease in lube oil viscosityCcompression expansion deviceDjacket water heater
单选题
Diesel engine starting difficulties due to cold intake air temperatures, can be overcome by using a/an（）
A
increase in starting air pressure
B
increase in lube oil viscosity
C
compression expansion device
D
jacket water heater
参考解析
解析：
暂无解析
相关考题：
What is the function of the after-coolers installed in the diesel engine air intake system?A.Decrease the air densityB.Increase the exhaust temperatureC.Decrease the lube oil temperatureD.Increase the air density
Cold weather starting of a diesel engine is more difficult than warm weather starting due toA.use of low viscosity oil in cold weatherB.increased moisture content of inlet air in cold weatherC.increased drag of pistons and bearings due to increased oil viscosityD.higher compression pressures reached due to smaller clearances existing in the engine during cold weather
In an operating diesel engine, which of the following conditions is an indication of a leaking air starting valve?A.Noise coming from that air starting valveB.Continuous operation of the starting air compressorC.Zero air pressure in the air starting systemD.Overheated starting air pipe to the cylinder head
If a diesel engine turned over freely but failed to start, the cause could be ________.A.water in the fuelB.cold lube oilC.excessive starting air pressureD.excessive fuel pressure
单选题A diesel engine is turned at normal cranking speed, but fails to fireThis can occur from （）Alow lube oil temperatureBlow starting air temperatureCair in the fuel injectionDwater in the starting air system
单选题The starting of a marine diesel engine is generally carried out with the assistance of （）.Acompressed airBelectricityChydraulic oilDcompressing air
单选题Stating a large propulsion diesel engine using diesel fuel during cold weather conditions can be made easier by （）Aincreasing the quantity of starting airBincreasing the lube oil pressureCheating the engine fuel supplyDheating the engine jacket water
单选题Intake air flow from a diesel engine turbocharger is directly proportional to engine（）Aexhaust gas pressureBexhaust gas temperatureCspeedDload
单选题What is the best way of stopping an over-speeding diesel engine?（）ADisconnect the battery cables from the starting motorBDrain the hydraulic fluid from the governor sumpCBlock the flow of cooling air to the radiatorDSecure the fuel supply and block the air intake
单选题Poor combustion in a diesel engine can be caused by （）.Ahigh compression pressureBlow intake air temperatureClow exhaust pressureDhigh scavenge air temperature
单选题Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by （）Aincreasing the quantity of starting airBincreasing the lube oil pressureCheating the engine fuel supplyDheating the engine coolant
单选题Which of the following methods is used to prevent throttling of compressed air through the diesel engine air starting valves?（）AHolding the valve open for a long periodBIncreasing the starting air pressure usedCOpening the stating air valve quicklyDReducing the starting air valve size
单选题A diesel engine is turned at normal cranking speed and no ignition occursThis could be the result of （）Alow lube oil temperatureBlow starting air temperatureCair bubbles in the fuel oil systemDwater in the starting air system
单选题Cooling the intake air supplied to a diesel engine will （）.Areduce mean effective pressureBdecrease average compression pressureCdecrease air charge densityDincrease power output
单选题Cold weather starting of a diesel engine is more difficult than warm weather starting due to（）Ause of low viscosity oil in cold weatherBincreased moisture content of inlet air in cold weatherCincreased drag of pistons and bearings due to increased oil viscosityDhigher compression pressures reached due to smaller clearances existing in the engine during cold weather
单选题What is the effect of heated intake air on a diesel engine? （）AIncreases efficiencyBIncreases engine horsepowerCIncreases engine lifeDReduces engine horsepower
单选题Cold weather starting of a diesel engine may be made easier by（）Adecreasing the compression ratioBusing a special fuel having a high ignition temperatureCincreasing the starting air supplyDheating the jacket water
单选题A large two-stroke/cycle direct reversing diesel engine is to be reversedPrior to the admission of starting air you must （）Aline up the engine fore restarting with light diesel oilBreposition the fuel injection camCchange the intake and exhaust valve cam positionsDplace the starting cam in the intermediate position
单选题A two-stroke/cycle diesel engine requires less starting air than a four-stroke/cycle diesel engine, of equal displacement, because the two-stroke/cycle diesel engine（）Ahas little or no internal frictionBhas a lower effective compression ratioCoperates with scavenge air under a positive pressureDoperates without energy absorbing intake and exhaust strokes
单选题Which of the following conditions can cause below normal air pressure in the intake manifold of a turbocharged diesel engine?（）AExcessive piston blow-by to the manifoldBInsufficient cooling water flowCAccumulated water in the air boxesDClogged air intake filters
单选题A restricted air intake to a diesel engine may result in the engine （）.Afailing to reach rated speedBknocking under maximum loadChunting or surging under light loadDoverspeeding and running away
单选题An electric heater built into some smaller diesel engines is used to （）.Araise lube oil viscosity for easier starting in cold weatherBincrease air inlet temperatureCincrease compression ratioDincrease jacket water temperature for easier starting in cold weather
单选题If a four-stroke/cycle diesel engine is started by injecting air into the cylinder, the pistons receiving the charge of starting air must be（）Aon the power strokeBon the exhaust strokeCat the end of the power strokeDat the start of the intake stroke
单选题When starting air is admitted, a diesel engine turns over very slowly without firingThe cause may be （）Aan obstruction in an cylinderBwater accumulation in some engine cylindersClow starting air pressureDlow scavenge air pressure
单选题In a naturally aspirated diesel engine, the volume of air intake is directly related to engine （）.Acompression ratioBvalve sizeCfuel pressureDcylinder clearance volume
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The highest pressure in a diesel engine cylinder normally occurs （）.Aat TDCBbefore TDCCafter TDCDduring air starting