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单选题
Fuel injection valves should be taken out, cleaned, and lifting checked every （）.
A
two to four months
B
four to six months
C
six to eight months
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单选题The primary function of a fuel delivery check valve assembly is to（）A
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control fuel quantity entering the pump bodyD
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单选题If the needle valve in a fuel injection nozzle sticks open （）.A
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单选题The burning of fuel oil in a diesel engine having a high sodium content, will cause （）A
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corrosion and gumming of the fuel injection pumpC
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单选题If a single cylinder relief valve on a main propulsion diesel engine begins to lift, but it is not possible to secure the engine, which of the following actions should be taken?（）A
Increase the cooling water flow to the engineB
Secure or reduce fuel to that cylinderC
Screw down on the pressure adjusting spring to decrease to decrease popping pressureD
Readjust the injection timing
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单选题Which of the conditions listed could cause the cylinder relief valves on a large, low-speed, propulsion diesel engine to lift?（）A
Plugged injector nozzlesB
Excessive fuel injectionC
Very late injection timingD
Incorrect crankshaft clearance
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单选题In order to inspect both piston and cylinder wall thoroughly, the cylinder cover should be taken off and the piston should be （）.A
craned outB
rolled outC
lifted outD
turned out
考题
单选题A diesel engine fails to start because of water in the fuelIn order to start the engine, you should （）?A
turn engine with jacking gearB
drain filters and strainers and bleed off water at each injection pumpC
use ether to start the engine with blow-down valves openD
blow through the cylinders and fuel lines with a drying agent
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单选题A drop in compression pressure in one cylinder of a diesel engine can be caused by（）A
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early fuel injectionD
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单选题Which one is not the normal operation for boiler shutdown?（）A
Carry out soot blowing if permissibleB
Change fuel supply to diesel oilC
Close steam stop valves on boiler when pressure is reducedD
Drain boiler empty when it has cooled down
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单选题If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will（）A
backfire through the air intakesB
develop less power under loadC
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单选题The injection may be delayed, （）the pumps are in good order, if the fuel lines to the injection valves have not been cleared of air.A
becauseB
thoughC
sinceD
until
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单选题If you observe any situation which presents a safety or pollution hazard during fuel transfer operations, which of the following actions should be taken FIRST?（）A
Close the valves at the transfer manifoldB
Notify the person in charge of the shore facilityC
Shut down the transfer operationD
Sound the fire alarm
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单选题Diesel engine valve springs function to （）A
hold the valves openB
keep the valves off their seats until the exhaust stroke is completedC
close the valvesD
open inlet valves when the air injection cycle begins
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Orsat apparatusB
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单选题Which of the following problems may occur if the opening pressure of a fuel injection nozzle is greater than specified by the engine manufacturer?（）A
The amount of fuel injected will be increasedB
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考题
单选题The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to （）.A
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allow oil backflow from the injector to the helixC
reduce fuel oil pressure between injection strokesD
meter the quantity of fuel delivered
考题
单选题If you suspect a diesel engine is misfiring due to air leakage into the fuel system, you should begin looking for the leak at the （）A
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gasket surfaces of the fuel oil filtersC
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单选题Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?（）A
The expansion tank should be topped offB
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单选题When restarting a heavy fuel diesel engine that has been stopped for some time, the engine should（）A
increase the starting air pressureB
use a higher than normal cranking speedC
increase the fuel injection pressureD
use a fuel having a lower ignition temperature
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单选题If a diesel engine runs out of fuel, you can expect trouble from （）A
overheated injection pumpsB
water condensation in the cylindersC
fuel dilution of the lube oilD
air in the fuel system
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单选题Which action should be taken when an auxiliary boiler in is operation?（）A
Clean all electrical connectionsB
Lift the relief valves by handC
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