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单选题
During check on top clearance in main bearings, turn the crankthrow for the relevant cylinder unit to （） and stop the lube oil circulating pump.
A
port side
B
starboard side
C
BDC position
D
DC position
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单选题（）means check the swing of the vessel’s head in a turn.A
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单选题During check on top clearance in main bearings, turn the crankthrow for the relevant cylinder unit to （） and stop the lube oil circulating pump.A
port sideB
starboard sideC
BDC positionD
DC position
考题
单选题Regarding fast path processing, when does the system perform the policy check?（）A
The policy is determined after the SCREEN options check.B
The policy is determined only during the first packet path, not during fast path.C
The policy is determined after the zone check.D
The policy is determined after the SYN TCP flag.
考题
单选题Adjust （） by means of lead wire.A
the clearance of the main bearingB
the diameter of main bearingC
the gap of main beatingD
the tolerance of main bearing
考题
单选题On most modern diesel engines, the main and connecting rod bearings receive their lubricating oil by （）.A
banjo feedB
splash feedC
gravity feedD
pressure feed
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单选题The highest loads applied to the diesel engine crankshaft main bearings are （）A
axial loadsB
firing loadsC
inertia loadsD
centripetal loads
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单选题With the shell and cap assembled as for running, a check must be made that the clearance between the cap and the housing （）.A
has a nipB
is large enoughC
is zeroD
are suitable
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单选题Your vessel has anchored in a channel known to have strong tidal currents. To check your position you take a round of bearings，one of which is a range in line. One hour later the bearing on the lights in range opens up. This indicates the ship is（）.A
swingingB
dredging her anchorC
taking bearings of the lightsD
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单选题The main function of tie rods in the construction of large, low speed diesel engines is to（）.A
stiffen the bedplate in way of the main bearings to increase the engines longitudinal strengthB
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单选题During operation, the （）should check the working condition of the derrick.A
foremanB
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openerD
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单选题Which method should be used to secure a manila line to bitts（）.A
A round turn on the bitt farthest from the strain and then figure eightsB
A round turn on the bitt closest to the strain and then figure eightsC
Figure eights and then a round turn at the top of both bittsD
Only figure eights are necessary on both bitts
考题
单选题Which of the following will take place if the clearance of the main bearings are excessive?（）A
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dropping of pressure of LOC
noisesD
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单选题Which of the following may take place if the clearance of the main bearings are excessive?（）A
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dropping of pressure of LOC
noisesD
all the above
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the clearance of the main bearingB
the play of the miler bearingC
the gap of the main bearingD
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单选题Valve lash, or clearance refers to the （）A
clearance between the top of the valve stem and the rocker armB
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单选题For a main diesel engine the lube oil in the bearings is drawn from （）, usually located in the bedplate.A
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a bottle
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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
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单选题In a diesel engine, when installing new piston rings it is important to check（） Ⅰ.ring gap clearance Ⅱ.side clearanceA
Ⅰ onlyB
Ⅱ onlyC
both Ⅰ and ⅡD
neither Ⅰnor Ⅱ
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单选题Just after stopping the engine while the oil is still circulating.Check that uniform oil jets appear from all the oil outlet grooves in the crosshead bearing lower shell and the guide shoes.The oil flow from （） must be compared from unit; there should be a similarity in the flow patterns.A
the piston cooling oil return pipesB
the main and crankpin bearingsC
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考题
单选题In some modern large diesel engines, which of the following is used as the support for the main bearings?（）A
BedplateB
BlockC
BaseD
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考题
单选题The engine may lose power or slow down during running, when this occurs, the first cause possible may be hot bearings and （） of the pistons in the cylinders.A
crackB
knockingC
leakingD
seizure
考题
单选题The best method to secure a towline to bitts is to（）.A
take a round turn on the bitt farthest from the pull and use figure-eightsB
take a round turn on the bitt closest to the pull and use figure-eightsC
use figure-eights and take a round turn at the top of the bittsD
use only figure-eights
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