更多"Before starting a diesel engine tha"的相关试题:
[单项选择]Before starting a diesel engine, you should always（）
A. check the pyrometer readings
B. check the crankcase oil level
C. check the fuel oil strainers
D. clean the fuel system
[单项选择]Immediately after starting a diesel engine, normal raw water and jacket water pressure are indicatedHowever, the jacket water temperature continues to rise, if there is no change in the sea temperature, you should suspect（）
A. overloading in all cylinders
B. a jammed three-way thermostatic valve
C. chromate PH too low
D. a high level in the surge tank
[单项选择]The main purpose of starting the diesel engine on air briefly is（）
A. to inspect if the cylinder has the water leakage
B. to expel out the residual water/gas/oil from the cylinder
C. to check if fuel supply is normal
D. A and B
[单项选择]Before starting any diesel or gasoline engine，which of the following must be checked? （）
A. Oil level
B. Flow of cooling water
C. Exhaust discharge
D. All of the above
[单项选择]If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase（）
A. inspection covers should not be opened until the engine has cooled
B. ventilation system should be continued in operation for one hour for cooling
C. scavenge pump should be immediately secured to prevent loss of lube oil
D. explosion covers should be opened slightly to provide extra ventilation
[单项选择]As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
A. Exhaust temperatures
B. Raw water pressure
C. Lube oil pressure
D. Air box pressure
[单项选择]Cold weather starting of a diesel engine is more difficult than warm weather starting due to（）
A. use of low viscosity oil in cold weather
B. increased moisture content of inlet air in cold weather
C. increased drag of pistons and bearings due to increased oil viscosity
D. higher compression pressures reached due to smaller clearances existing in the engine during cold weather
[单项选择]Cold weather starting of a diesel engine may be made easier by（）
A. decreasing the compression ratio
B. using a special fuel having a high ignition temperature
C. increasing the starting air supply
D. heating the jacket water
[单项选择]The starting of a marine diesel engine is generally carried out with the assistance of （）.
A. compressed air
B. electricity
C. hydraulic oil
D. compressing air
[单项选择]Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to（）
A. higher speed required
B. flywheel-effect
C. lower starting temperatures
D. higher compression pressures
[单项选择]In the starting process of a diesel engine, the main object is to attain the compression conditions sufficient to （）
A. turn the flywheel
B. reduce friction
C. overcome inertia
D. ignite the fuel
[单项选择]How should you warm up a diesel engine that has not been run for some time? （）
A. Run it at minimum speed for a period of time
B. Run it at half speed for a period of time
C. Bring it to top speed immediately
D. Inject ether into the air intake
[单项选择]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
[单项选择]Before a marine diesel engine is started the cylinders and pistons must be （）.
A. cooled to appropriate temperature
B. warmed up gradually to appropriate temperature
C. opened up and renewed
D. ground and polished
[单项选择]A diesel engine cranks properly during starting but immediately stallsWhich of the following systems is most likely at fault?（）
A. Hydraulic starting
B. Electric starting
C. Ignition
D. Fuel
[单项选择]The timing of diesel engine air starting valves is controlled by（）
A. the air start valve timing gears and rods
B. a cylinder check valve
C. individual cams and valve gear
D. an air manifold poppet valve
[单项选择]When starting air is admitted, a diesel engine turns over very slowly without firingThe cause may be （）
A. an obstruction in an cylinder
B. water accumulation in some engine cylinders
C. low starting air pressure
D. low scavenge air pressure
