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单选题
A Kort nozzle is a(n)（）.
A
hollow tube surrounding the propeller used to improve thrust
B
nozzle attached to a firefighting hose
C
intake valve on a diesel engine
D
piston cylinder on a diesel engine
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If a firefighting situation calls for low-velocity fog you would ______．A.order the engine room to reduce pressure on the fire pumpB.put the lever on an all-purpose fire nozzle all the way forwardC.attach a low-velocity fog applicator with the nozzle shut downD.put the lever on an all-purpose fire nozzle all the way back
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A Kort nozzle is a(n) ______.A.hollow tube surrounding the propeller used to improve thrustB.nozzle attached to a firefighting hoseC.intake valve on a diesel engineD.piston cylinder on a diesel engine
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Kort nozzles are installed around the propellers of some vessels to ______.A.increase the thrust of the propellerB.protect the propeller from striking sawyersC.protect the propeller from striking barges towed on the hipD.protect the propeller from touching bottom in low water
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考题
单选题If a firefighting situation calls for low-velocity fog you would（）.A
order the engine room to reduce pressure on the fire pumpB
put the lever on an all-purpose fire nozzle all the way forwardC
attach a low-velocity fog applicator with the nozzle shut downD
put the lever on an all-purpose fire nozzle all the way back
考题
单选题Fuel oil discharged to the diesel engine cylinder is atomized at the （）A
turbochargerB
injection nozzle tipC
carburetorD
fuel oil pump
考题
单选题If the needle valve in a fuel injection nozzle sticks open （）.A
no fuel will be delivered through the nozzleB
the nozzle will overheat and crackC
time of injection will changeD
fuel will leak into the drain line
考题
单选题In a turbocharger, inlet air velocity is increased in the（）.A
inlet nozzle ringB
stationary diffuser passagesC
compressor outlet voluteD
rotating impeller vanes
考题
单选题On the all-purpose nozzle，the position of the valve when the handle is all the way forward is（）.A
shutB
fogC
solid streamD
spray
考题
单选题Which method listed below is acceptable by classification society to perform hose testing to weather tight hatch covers and closing appliances（）A
This is to be carried out at a maximum distance of 1,5m with a hose pressure not less than 2,0 kgf/cm2. The nozzle diameter is not to be less than 12mm.B
This is to be carried out at a maximum distance of 1,5m with a hose pressure not less than 3,5 kgf/cm2. The nozzle diameter is not to be less than 5mm.C
This is to be carried out at a maximum distance of 1,5m with a hose pressure not less than 4,0 kgf/cm2. The nozzle diameter is not to be less than 8mm.D
This is to be carried out at a maximum distance of 2,0m with a hose pressure not less than 2,0 kgf/cm2. The nozzle diameter is not to be less than 12mm.
考题
单选题The all-purpose nozzle will produce a fog spray when you（）.A
pull the nozzle handle all the way back toward the operatorB
pull the nozzle handle back to a position where the handle is perpendicular to the plane of the nozzleC
push the nozzle handle forward as far as it will goD
insert a fog applicator between the fire hose and nozzle
考题
单选题In the common rail system, excessive pressure in the header may be caused by （）A
improper adjustment of the bypass valveB
a dribble in the fuel injection nozzleC
insufficient leak-off through injection nozzle packingD
a malfunctioning injection nozzle
考题
单选题Failure of the burner flame in an auxiliary boiler would probably be a result of（）A
water in the fuel oilB
broken high tension leadsC
incorrect electrode settingD
full fuel pressure at the nozzle
考题
单选题The danger of a charged hose left unattended on deck with the nozzle open is（）.A
the hose could burstB
the nozzle end will whip about causing damage or injuryC
water damage to vessel's cargo or structureD
personnel might trip over the hose
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单选题The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the （）A
inlet nozzle ringB
turbine wheel bladeC
diffuser passagesD
inlet vol
考题
单选题A fire hose has a（）.A
male coupling at both endsB
female coupling at both endsC
female coupling at the nozzle end and a male coupling at the hydrant endD
male coupling at the nozzle end and a female coupling at the hydrant end
考题
单选题Dirt lodged on the nozzle valve seat of a fuel injection nozzle will cause（）A
erosion and cratering of the nozzle orificesB
fuel leakage into the nozzle drain lineC
fuel leakage before and after injectionD
insufficient fuel delivery though that nozzle
考题
单选题A combination or all-purpose nozzle produces（）.A
low-velocity fog onlyB
a solid stream onlyC
a solid stream and foamD
a solid stream and fog
考题
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
The start of injection will be retardedC
The nozzle will permit fuel to dribbleD
The spray pattern will be distorted
考题
单选题The three basic parts of any eductor are the nozzle, the suction chamber, and the （）.A
injectorB
compressorC
diffuserD
siphon
考题
单选题Distortion of the spray pattern of a nozzle or injector may be indicated by a/an（）A
high firing pressureB
overload of that particular cylinderC
smoky exhaustD
cooling water temperature rise
考题
单选题A defective injector nozzle in a propulsion diesel engine can cause（）A
engine power lossesB
smoking due to unburned fuelC
high exhaust temperature readingsD
all of the above
考题
单选题Kort nozzles are installed around the propellers of some vessels to（）.A
Increase the thrust of the propellerB
Protect the propeller from striking sawyersC
Prevent the propeller from striking barges towed on the shipD
Prevent the propeller from touching bottom in low water
考题
单选题When using a high-velocity fog stream in a passageway，the possibility of a blow back must be guarded against. Blow back is most likely to occur when（）.A
pressure builds up in the nozzle which causes a surge of waterB
the only opening in a passageway is the one from which the nozzle is being advancedC
pressure in the fire hose drops below 100 psiD
a bulkhead collapses due to heat and pressure
考题
单选题When a fuel injection nozzle overheats, which of the problems listed can be expected?（）A
The fuel metering will varyB
The fuel will explodeC
The cylinder head will crackD
The engine will stop
考题
单选题Inspection of a Halon extinguisher involves checking the hose，handle，nozzle，and（）.A
sight glassB
weighing the extinguisherC
service technicians reportD
last date it was charged
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