更多"The plunger is machined to very fin"的相关试题:
[单项选择]Maintaining the close tolerances in diesel fuel pumps and injectors requires the use of（）.
A. fuel/water separators
B. day tanks
C. injector test stand
D. fuel filters
[单项选择]Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires（）
A. grinding the spare plunger to the barrel
B. replacing the plunger and the barrel
C. highly polishing both the plunger and barrel
D. replacing plunger only
[单项选择]The crankpins and journals were machined and matching holes bored in the webs, which were slightly （） in diameter.
A. smaller
B. larger
C. higher
D. lower
[单项选择]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
[单项选择]Guide tolerances during elevation of the jack-up rig will（）.
A. reduce spud can bearing pressure
B. keep the unit level and reduce overloading
C. reduce stresses on the hull
D. minimize the potential for punch-through
[单项选择]The plunger in the fuel injector pump, usually operated by a （）, is driven up and down when working.
A. crankshaft
B. camshaft
C. piston rod
D. rack and pinion
[单项选择]As the plunger moves upwards in the barrel, injection will commence once the plunger has （） the spill ports and the pressure builds up.
A. opened up
B. closed off
C. lined up
D. taken off
[单项选择]If the plunger or barrel of a fuel injection jerk pump becomes damaged,（）
A. only the replacement of the entire pump would be acceptable
B. the injection pump and injection nozzle must be replaced
C. either the barrel or plunger must be replaced
D. the barrel and plunger must be replaced as a unit
[单项选择]A common trouble with the fuel pump plunger or fuel valve spindle is （）.
A. water leakage
B. steam leakage
C. oil leakage
D. air leakage
[单项选择]The plunger may be rotated in the barrel by a rack and （） on a sleeve which is keyed to the plunger.
A. pinion arrangement
B. push rod
C. handle bar
D. cam device
[单项选择]The plunger in a jerk pump is rotated until the release port is uncoveredIf 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
[单项选择]As the plunger moves up, the ports are closed and the fuel （） and delivered to the injector nozzle at very high pressure.
A. being compressed
B. to be pumped up
C. is pressurized
D. are built up
[单项选择]Cast iron carrier rings, （） machined grooves, are provided for all the pistons.
A. caulked into
B. caulking into
C. pressed into
D. screwed into
[单项选择]（）Fine, thanks.
A. How do you do?
B. Hello!
C. Nice to meet you.
D. How are you?
[单项选择]（）fine weather it is!
A. What
B. What a
C. How
D. How a
[单项选择]All portable fine extinguishers must be capable of being（）.
A. carried by hand to a fire
B. carried or rolled to a fire
C. recharged in the field
D. used on class B fires
[单项选择]If there is any fine arising from inadequacy of marks，（）shall be liable for it.
A. the Carrier
B. the Owner
C. the Captain
D. the Merchant
[单项选择]The fuel injector injects a fine spray of fuel into the hot air and combustion （）, producing much high pressure in the gases.
A. has begun
B. takes place
C. occurs
D. happens
[单项选择]Pumps and fine filters are arranged （） with one as standby.
A. in duplicate
B. in double
C. at twice
D. for two
