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单选题
When attempting to start a main propulsion diesel engine, the engine, the engine turns at the proper speed but will not startYou should check the（）
A
starting air pressure
B
scavenge air pressure
C
over-speed trip
D
banjo oiler line
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更多 “单选题When attempting to start a main propulsion diesel engine, the engine, the engine turns at the proper speed but will not startYou should check the（）A starting air pressureB scavenge air pressureC over-speed tripD banjo oiler line” 相关考题
考题
When the ship, its main propulsion device equipped with clutch, arrived at the port and finished with the engine, the correct operation should be______.A.disengaging the clutch firstly, then stopping the main engineB.stopping the main engine firstly, then disengaging the clutchC.stopping the cooling water pump firstly, then stopping the main engineD.stopping the main engine and disengaging the clutch at the same time
考题
In a main propulsion turbocharged diesel engine, the speed of the turbocharger varies according to the _____.A.governor droopB.speeder spring tensionC.fuel rack lagD.load on the engine
考题
单选题On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measured by using a/an （）A
dial indicatorB
outside caliperC
bridge gaugeD
tram rod
考题
单选题Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent （）.A
excessive crankcase pressureB
excessive lube oil temperatureC
contamination of the lube oil by waterD
contamination of the cooling water by lube oil
考题
单选题The power developed by a large slow-speed main propulsion diesel engine is dependent upon the （）A
quantity of air it takes in and retains in the cylinders during a given time periodB
proportion of trapped air that is utilized in the combustion processC
thermodynamic efficiency of the engine cycleD
all of the above
考题
单选题The purpose of an oil mist detector in a main propulsion diesel engine is to warn of （）A
excessive mist density in the crankcasesB
excessively high crankcase vacuumC
excessively high bearing temperatureD
excessive carbon buildup in the lube oil
考题
单选题In order to start a large, low-speed, main propulsion diesel engine on high viscosity fuel after an extended shutdown, the （）A
fuel must be preheatedB
intake air should be preheatedC
lube oil outlet temperature should be increased 20℃ above normalD
none of the above
考题
单选题What color exhaust will be exhibited when a slow speed two-stroke/cycle main propulsion diesel engine, designed to operate on light and heavy fuel oil, is operated on insufficiently preheated heavy fuel oil?（）A
WhiteB
BlackC
BlueD
Clear
考题
单选题When attempting to start a main propulsion diesel engine, the engine, the engine turns at the proper speed but will not startYou should check the（）A
starting air pressureB
scavenge air pressureC
over-speed tripD
banjo oiler line
考题
单选题When the general alarm is sounded continuously, the engine room personnel should （）.A
proceed to their man overboard stationsB
start the fire pumpC
put on lifejackets and go to their abandon ship stationsD
secure the propulsion diesel engines and evacuate the engine room
考题
单选题If a main propulsion diesel engine hunts excessively at idle speed, you should （）A
adjusts the idle speed controlB
drain and flushes the governor and replace the oilC
adjusts the compensating needle valve
考题
单选题During maneuvering operations for a direct reversing large, low-speed, main propulsion diesel engine, which of the following actions is used to stop the shaft from turning prior to reversing the engine rotation?（）A
Flywheel inertiaB
Admission of starting airC
The way of the vesselD
securing of fuel to the cylinders
考题
单选题Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an （）.A
overspeed tripB
audible/visual alarmC
the ships/boats general alarmD
reserve oil storage tank
考题
单选题In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?（）A
Bed plateB
ColumnC
EntablatureD
Tie rod
考题
单选题A large, low-speed, main propulsion diesel engine uses sea water to directly cool the （）.A
cylinder headsB
exhaust valvesC
scavenging airD
injectors
考题
单选题On a medium-speed main propulsion diesel engine, the crank-pin or crank journal bearings receive lubricating oil from （）.A
a spindle lubricatorB
an oil jetC
internal splashingD
drilled passages in the crankshaft
考题
单选题Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?（）A
Defective temperature controls in the systemB
Cavitation in the cooling water pumpC
Opened vent in the cooling systemD
Restricted water passages in the engine
考题
单选题When the ship, its main propulsion device equipped with clutch, arrived at the port and finished with the engine, the correct operation should be（）A
disengaging the clutch firstly, then stopping the main engineB
stopping the main engine firstly, then disengaging the clutchC
stopping the cooling water pump firstly, then stopping the main engineD
stopping the main engine and disengaging the clutch at the same time
考题
单选题To determine the main bearing clearance of a propulsion diesel engine, you should measure the main bearing shell using a ball anvil outside micrometer and measure the crankshaft journal using a/an （）A
telescopingB
ring ‘snap’ gaugeC
inside vernier caliperD
outside micrometer
考题
单选题In a main propulsion turbocharged diesel engine, the speed of the turbocharger varies according to the （）A
governor droopB
speeder spring tensionC
fuel rack lagD
load on the engine
考题
单选题When a ship is entering to narrow waterway and the fuel feeding of the main engine is keeping unchanged, which of the following is the wrong conclusion?（）A
the power of main engine will be reducedB
exhaust temperature will be increasedC
the speed of the ship will be reducedD
the propulsion characteristic of propeller will keep unchanged
考题
单选题The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by （）.A
large conical springsB
compressed air pressureC
hydraulic pressureD
exhaust gas pressure
考题
单选题An indication of an overloaded main propulsion diesel engine is （）A
white smoke in the exhaustB
high exhaust gas pyrometer readingsC
sparks in the exhaustD
blue smoke in the exhaust
考题
单选题When running a large, low-speed, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching back over to diesel oil?（）A
The diesel oil must never be allowed to mix with the heavy fuelB
The temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valveC
The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valveD
The heating steam must be secured before the diesel oil passes through the three-way valve
考题
单选题A possible cause for an individual piston to knock when at TDC on a slow-speed, two-stroke/cycle main propulsion diesel engine could be due to （）A
early fuel injectionB
excessive bearing play within the running gearC
overloading of the cylinderD
all of the above
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