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单选题
For a propeller direct driven by the engine,（）.
A
the thrust pads are while metal faced on both sides
B
the thrust pads are while metal faced only on the forward side
C
the thrust pads are while metal faced only on the after side
D
intermediate shaft usually supported by a plummer block
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更多 “单选题For a propeller direct driven by the engine,（）.A the thrust pads are while metal faced on both sidesB the thrust pads are while metal faced only on the forward sideC the thrust pads are while metal faced only on the after sideD intermediate shaft usually supported by a plummer block” 相关考题
考题
A thrust bearing is used with a propulsion diesel engine to ____.A.control axial movement of the crankshaftB.transmit engine thrust to the propeller shaftC.absorb vibrations in the propeller shaftingD.prevent propeller thrust from being transmitted to the hull
考题
A controllable pitch propeller on a diesel driven vessel eliminates the need forA.friction clutchesB.disconnect clutchesC.reversing gearsD.reduction gears
考题
Compared to a constant pitch propeller, a controllable pitch propellerA.more efficiently uses available engine powerB.operates at a lower efficiency at a fixed speedC.produces the same torque at lower engine powerD.develops its rated power at a lower speed
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单选题If keep the fuel injection of main engine unchanged when ship is fouled, that will causeⅠ.The speed of main engine to be reduced Ⅱ.Ship speed to be reduced Ⅲ.The resistance torque of propeller to be increased Ⅳ.Trim at stern to increase（）A
Ⅰ + ⅡB
Ⅰ ~ ⅢC
Ⅰ ~ ⅣD
Ⅰ + Ⅱ + Ⅳ
考题
单选题While a ship with twin screw is making a turn, in order to prevent overload, the duty engineer should （）A
reduce the fuel feeding of main engine of inner propellerB
reduce the fuel feeding of main engine of outer propellerC
firstly reduce the fuel of main engine of inner propeller, then reduce the fuel feeding of engine of outer propellerD
reduce fuel feeding of two engines at the same time
考题
单选题Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.A
open the bypass lineB
cut in the lube oil coolerC
pressurize the lube oil systemD
top off the expansion tank
考题
单选题A thrust bearing is used with a propulsion diesel engine to （）.A
control axial movement of the crankshaftB
transmit engine thrust to the propeller shaftC
absorb vibrations in the propeller shaftingD
prevent propeller thrust from being transmitted to the hul
考题
单选题The transmission system transmitting power from the engine to the propeller is composed of shafts, bearings, and（）A
propellerB
flying wheelC
main engineD
crankshaft
考题
单选题Why a gearbox is needed in a ship driven by a medium-speed diesel engine?（）A
To reduce the main engine speedB
To increase the main engine speedC
To govern the main engine speedD
To fix the propeller shaft
考题
单选题A thrust block is designed to（）.A
transmit the thrust of the engine to the propellerB
transmit the thrust of the propeller to the vesselC
absorb the shock of wave pressure at the bowD
be placed between the engines and the foundation to absorb the vibration
考题
单选题To successfully reduce an excessively high diesel engine exhaust gas temperature, you should （）.A
reduce the engine driven fuel pump outlet pressureB
retard the fuel injector timing to reduce powerC
increase the fuel rack settingD
reduce the load on the engine
考题
单选题Which of the following statements is correct concerning diesel engine cooling water systems?（）A
Each engine must have its own engine driven cooling water pump capable of providing cooling for all ranges of operationB
propulsion engines with bores exceeding 200 mm are to be fitted with a means to display the cooling water temperature of each cylinderC
At least two independent sea suctions are to be provided for supplying water to the engine jackets or to the heat exchangersD
Suitable strain are to be fitted between the circulating pumps and heat exchangers when sea water is used for direct cooling
考题
单选题Some medium and high-speed diesel engines require reduction gear units to provide a useful propeller speedIn most reduction gears, the bull gear（）A
must churn the oil in the sumpB
is connected to the propeller shaftC
is driven at the highest RPMD
compensates for alignment variations between the engine and pinion gear
考题
单选题Compared to a constant pitch propeller, a controllable pitch propeller（）.A
more efficiently uses available engine powerB
operates at a lower efficiency at a fixed speedC
produces the same torque at lower engine powerD
develops its rated power at a lower speed
考题
单选题Propeller running at （） are generally efficient.A
high speedsB
medium speedC
low speedsD
the same speed with the engine
考题
单选题The four-stroke engine is used for （） and sometimes for main propulsion with a gearbox to provide a propeller speed of between 90 to 120 rev/min.A
alternatorB
turbo-chargerC
remote controllerD
windlass
考题
单选题In using reduction gears to obtain efficient propeller speeds, （）.A
they must be located at the after end of the engineB
they can only be used with one engine at a timeC
they eliminate the need for controllable pitch propellersD
they are connected to the engine with a flexible coupling
考题
单选题The linear motion of a diesel engine piston is converted to the rotary motion required to drive gears, propeller shafts, and generators by the （）.A
flywheelB
crankshaftC
journal bearingsD
camshaft
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
考题
单选题About the jacket water, that of the auxiliary engines usually（） is circulated by pumps, and the main engine usually （）A
an engine-driven；as wellB
an engine-driven；has an independent pumpC
an independent；as wellD
an independent；has an engine-driven pump
考题
单选题Fuel oil transfer systems used onboard diesel propelled vessels are required to have （）.A
two fuel oil transfer pumps provided where one is to be independent of the main engineB
two fuel oil transfer pumps, with a combined capacity exceeding the maximum consumption of the main engineC
engine driven transfer pumps and only used in constant speed applicationsD
the capacity of the engine driven pump exceed the consumption rate of the engine to which it is attached
考题
单选题During the dock repair, when installing the tail shaft and propeller, who should be on the spot to supervise?（）A
chief engineerB
the engineerC
captainD
any member of the engine department
考题
单选题Always ensure that the turning gear is（）, even at the quay, the wake from other ships may turn the propeller and thus the engine.A
disengagedB
engagedC
assembledD
disassembled
考题
单选题If your propeller is racing in rough weather，you should（）.A
decrease your engine speedB
ignore itC
increase your engine speedD
stop your engine until the rough weather passes
考题
单选题With（） the engine need not to be aligned with reduction gears or propeller shaft.A
Diesel engine propulsionB
Diesel electric propulsionC
Steam engine propulsionD
Gas turbine propulsion
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