海船船员考试
单选题The amount of fuel delivered by a helical plunger fuel injection pump is controlled by （）A varying the pump discharge pressureB varying the pump return pressureC rotation of the pump plungerD rotation of the pump barrel
题目
varying the pump discharge pressure
varying the pump return pressure
rotation of the pump plunger
rotation of the pump barrel
相似问题和答案
第1题：
throttling the pressure line
changing the speed of the rotor
either A or B
None of the above is tree
第2题：
changes the position of the fuel inlet ports
changes the length of the pump stroke
varies the quantity of fuel delivered
varies the compression of the delivery valve spring
第3题：
The plunger in a jerk pump is rotated until the release port is uncovered If the port remains uncovered all of the time, which of the listed operations will occur?
A.No fuel will be delivered
B.The maximum effective stroke will be attained
C.The fuel delivered to the cylinder will be excessive
D.The injection nozzle will overheat and carbonize
第4题：
water leakage
steam leakage
oil leakage
air leakage
第5题：
crankshaft
camshaft
piston rod
rack and pinion
第6题：
the pump supply pressure
the slope of the fuel cam
how the plunger is rotated
the number of sleeve segments engaged with the rack
第7题：
deliver proper fuel quantity to the injection nozzle
provide rapid fuel injection cutoff
control fuel quantity entering the pump body
control fuel pressure delivered to the combustion chamber
第8题：
The amount of fuel delivered by a helical plunger fuel injection pump is controlled by ______.
A.varying the pump discharge pressure
B.varying the pump return pressure
C.rotation of the pump plunger
D.rotation of the pump barrel
第9题：
no fuel will be delivered through the nozzle
the nozzle will overheat and crack
time of injection will change
fuel will leak into the drain line
第10题：
controlling the amount of fuel injected into the cylinders
varying the speed of the turbocharger
adjusting the compression ratio
changing the timing of the fuel injection camshaft