WorksheetsEUI Fuel System Quiz
Total questions: 15
Worksheet time: 8mins
To withstand higher loads exerted on the valve train by the EUI fuel system, valve trains were updated to include a ______________.
Narrow injector cam lobe
More malleable component surfaces
Steel ceramic-alloy roller rockers
Camshaft for injectors only
EUI injectors are capable of delivering injection pressures of _______________.
32,000 psi
35,000 psi
38,000 psi
42,000 psi
EUI nozzle valve opening pressure can vary between _______________.
3500-5000 psi
1800-2400 psi
4800-6200 psi
900-1200 psi
How is fuel pressure regulated within the EUI ?
Camshaft profile
Fuel charging pressure
Engine rpm
Poppet valve operation
Injector response time is measured in _____________.
Mega-seconds
Milli-seconds
Nano-seconds
Seconds
N3 and E3 injectors are supplied fuel pressure between _____________.
20-30 psi
30-50 psi
40-80 psi
75-90 psi
When does the injector plunger start its downward stroke?
Injector solenoid is energized
Charging fuel enters the injector
Camshaft rotates to inner base circle
Camshaft rotates to outer base circle
Where are the fuel pressure regulator valve and restricted orifice located within a EUI fuel system?
Primary system
Secondary system
Return system
Injection system
Where would a technician find a EUP installed?
Mounted to engine block
Mounted to cylinder head
Located in intake manifold
Located under the rocker cover
Which component directly actuates the EUI?
Injector push rod
Injector cam lobe
Injector solenoid
Injector rocker lever
Which factor necessitates the use of injector calibration codes?
Applied fuel pressure
High injection pressures
Manufacturing tolerances
Rated horse power
Which injector cup would provide superior corrosion resistance?
Stainless steel
Copper
Brass
Cast iron
Which lubricant should be used to lubricate injector O-rings during installation?
High pressure grease
Engine coolant
Engine oil
Diesel fuel
Which material may be used to manufacture injector cups?
Brass
Aluminum
Steel
Titanium
Which measuring tool would a technician use to verify injector tip protrusion when the cylinder head has been removed from the cylinder block?
Dial indicator
Straight edge
Feeler blade
Steel ruler
