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单选题
Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or （）
A
inside micrometer
B
feeler gauge and straight edge
C
adjustable trammel
D
sighting device
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When the tail-shaft is drawn from a vessel in dry-dock, which of the following inspections is required to be carried out?A.The propeller hub taper and shaft keyway should be inspected for cracks or corrosionB.The stern bearing alignment with the stern frame should be checkedC.The interior of the stern tube should be inspected for leaksD.The shaft liner should be removed and inspected for cracks
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单选题A large vessel is equipped with a controllable pitch propeller. Which statement is TRUE?（）.A
When dead in the water，it is often difficult to find the neutral position and slight headway or sternway may resultB
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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 sidesB
the thrust pads are while metal faced only on the forward sideC
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intermediate shaft usually supported by a plummer block
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单选题0n a single-screw vessel the stern frame（）.A
furnishes support to the rudder, propeller shaft, and transom frameB
provides foundations for after mooring winchesC
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furnishes support to the rudder，propeller shaft，and transom frameB
provides foundations for after mooring winchesC
provides foundations for the main propulsion enginesD
transfers the driving force of the propeller to the hull
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单选题Gear-type flexible couplings are often used in diesel engine drive trains because they（）A
require no lubrication under normal operating conditionsB
compensate for gross misalignment in the drive trainC
are able to transmit high torque ,even where slight misalignment existsD
will rapidly disconnect the engine from the line shaft
考题
单选题Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or （）.A
inside micrometerB
feeler gaugeC
adjustable trammelD
sighting device
考题
单选题Which of the following statements represents an advantage of an electromagnetic clutch?（）A
Large misalignments can be tolerated between the shaft and engine couplingB
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考题
单选题In the cargo winch, spur reduction gearing transfers the motor drive to （）.A
the toping lightB
the board brakeC
the fail-safeD
the barrel shaft
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单选题When the tail-shaft is drawn from a vessel in dry-dock, which of the following inspections is required to be carried out?（）A
The propeller hub taper and shaft keyway should be inspected for cracks or corrosionB
The stern bearing alignment with the stern frame should be checkedC
The interior of the stern tube should be inspected for leaksD
The shaft liner should be removed and inspected
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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
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单选题Which of the following items isn’t belonging to Docking survey?（）A
Examination of the shell including bottom, side and bow platingB
Examination of sea suctions, overboard discharging valves and sea chestsC
Load testing of lifeboat launching devicesD
Poker gauge of propeller shaft taken
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a variable-speed AC generatorB
a fixed-speed AC generatorC
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单选题In the （） refrigeration compressor one end of the crank shaft extends through the crankcase house for connection, via a coupling or pulley, to an external drive motor.A
open-typeB
hermeticC
semi-hermeticD
all the above
考题
单选题Where a propeller shaft passes through the hull，water is prevented from entering by means of a（）.A
stuffing boxB
propeller bossC
seacockD
stop-water
考题
单选题“Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired, or at least patched up temporarily until the next stop” This sentence means that （）.A
Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired on the spotB
Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired on the next port of callC
Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired until the next stopD
Any leaks in piping, propeller shaft, machinery, tanks, will have to be at least patched up
考题
单选题Some vessels are equipped with a water lubricated stern robeWhen at sea, operating under normal conditions, the water service valve from the ships saltwater system to the bearing should be （）.A
closed, and no leakage permitted across the shaft packingB
closed, and only slight leakage permitted across the shaft packingC
open, and no leakage permitted across the shaft packingD
open, and only slight leakage permitted across the shaft packing
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A wobbling tail shaft is an indication of（）.A
shallow waterB
an engine that is misfiringC
a tight tail shaft glandD
worn stern bearing or misalignment
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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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