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单选题
The crank chamber oil （）.
A
can be recovered
B
is only supplied to cylinders
C
only feeds the main bearing
D
is a kind of detergent
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考题
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单选题Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.A
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单选题If （） are taken at regular intervals, any unequal distribution of load will be easily found out.A
differential of crank-websB
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单选题Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?（）A
Control the amount of lube oil burned in the combustion chamberB
Transmit heat from the piston to the cylinder linerC
Prevent damage to ring groove inserts by acting as a heat damD
Dissipate combustion chamber gas pressure by channeling it through the ring gap
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internal crankshaft passagesB
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injection lubrication
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单选题Operating conditions in the crank chamber are very （） those in the cylinder.A
the same asB
similar toC
separated fromD
different from
考题
单选题One method of determining crankshaft misalignment is by（）A
laying a straight edge across the crank webs at the crankpin and measuring the distance to the crankpin in two placesB
measuring the crank drop on either side of each crank throw while the crankshaft is slowly rotated through one revolutionC
rotating the crankshaft through one revolution, pausing each 90oof rotation to measure bearing clearances, top and bottomD
taking micrometer reading between the crank cheeks opposite the crankpin every 90°of crank angle rotation
考题
单选题On a medium-speed main propulsion diesel engine, the crank-pin or crank journal bearings receive lubricating oil from （）.A
a spindle lubricatorB
an oil jetC
internal splashingD
drilled passages in the crankshaft
考题
单选题The crank throws are displaced from （） to obtained the same number of degrees between the different crank throws.A
one anotherB
the otherC
each otherD
each others
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单选题In diesel engines designed with a crosshead, the motion of the piston rod can be described as （）.A
reciprocating at the piston pin, rotary at the crank pinB
reciprocating at the crank pin, rotary at the piston pinC
straight reciprocationD
straight rotation
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单选题The diameter of the crank-pins should be measured with a （）.A
salinometerB
thermometerC
tachometerD
micrometer
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单选题What is the crank angle between any two crank throws in the firing order of a four-stroke/cycle, in line, eight cylinder diesel engine?（）A
45B
60C
90D
100
考题
单选题Each crank is made up of two crank webs joined by a common（） to which the bottom endbearing is fitted.A
throwB
crankshaftC
crankpinD
crosshead
考题
名词解释题crank
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