Which of the fuel injection systems listed uses a spring loaded differential spray needle valve and an individual pump for each cylinder?/Jerk pump injection
Fuel injection pumps using the port and helix metering principle requires the use of a ___________./lapped plunger and barrel
The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to _____________./assist in a quick cutoff of fuel injection
Where is the fuel delivery check valve located in a jerk pump fuel injection system?/In the injection pump housing discharge
The delivery valve installed in a port and helix fuel injection pump is designed to ____________./maintain a column of fuel in the line
The main difference between an "APF" and an "APE" type fuel injection pump, is the design of the ____________./cylinder arrangement
A port-and-helix fuel injection pump having upper and lower plunger helixes is designed to _____________./vary the beginning and ending of injection
Which of the following statements describes a fuel injection pump marked "timed for port closing"?/Injection has a constant beginning and variable ending.
The port-and-helix metering pumps, used in diesel fuel injection systems, are usually designed to produce a constant beginning and a variable ending of fuel injection. These pumps are usually _____________./timed for port closing
The end of fuel injection in a port-and-helix metering pump can be controlled by _____________./uncovering a fuel port in the pump barrel
The amount of fuel delivered by a helical plunger fuel injection pump is controlled by _____________./rotation of the pump plunger
The duration of fuel injection developed by an individual port-and-helix fuel injection pump, is determined by the ____________./effective pump stroke
Movement of the pump control rack in a fuel injection system using individual plunger-type pumps _____________./varies the quantity of fuel delivered
The effective pump stroke of an individual port-and-helix fuel injection pump is determined by the ________________./plunger control rack position
The amount of fuel delivered by a helical plunger type fuel injection pump is controlled by _____________./rotation of the pump plunger
On a diesel engine equipped with individual jerk type fuel pumps, adjustments should be made to the tappets (push rods) of the pumps to ____________./equalize effective delivery strokes
The fuel injection pumps on a diesel engine are controlled by a linkage system attached to the _____________./governor
The effective stroke of a constant-stroke, individual, fuel injection pump is varied by the _____________./control rack
A fuel leak occurs in the high pressure fuel piping between the injection pump and fuel nozzle. This requires immediate repair because of the _____________./serious fire hazard
Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires _____________./replacing the plunger and the barrel
While overhauling a jerk-type fuel pump it is necessary to replace the pump plunger. Which of the parts listed below must also be replaced?/Pump barrel
If the plunger or barrel of a fuel injection jerk pump becomes damaged, _____________./the barrel and plunger must be replaced as a unit
Uneven bolt tightening during the installation of a fuel injection pump can result in _____________./binding of pump moving parts
If lost motion is present in an individual fuel injection pump, which of the following problems will occur?/Fuel injection will occur later.
If the plunger or barrel of a fuel injection jerk pump becomes damaged, _____________./the entire pump must be replaced
The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to _____________. I. assist in a quick cutoff of fuel injection II. prevent fuel oil backflow from the injection pump/I only
Problems with the diesel engine fuel injection pump are usually caused by _____________./contaminated fuel
FUEL PUMPS
![FUEL PUMPS]()
Reviewed by HODO
on
July 21, 2014
Rating:
