What drivability problem would occur if a governor spring were to break?
Technician A says that secondary fuel filters are usually in the range of 5-7 microns. Technician B says that primary fuel filters are usually in the range of 15-25 microns. Who is correct?
Technician A says that the primary fuel filter is usually on the suction side of the transfer pump. Technician B says that the secondary fuel filter is usually on the suction side of the transfer pump. Who is correct?
Technician A says that a fuel system must supply the correct quantity of fuel and time the fuel delivery. Technician B says that a fuel system must control the delivery rate and distribute the fuel evenly into the cylinder. Who is correct?
How will a diesel engine perform when operating on a fuel with a high cetane rating in the summer time?
What controls the maximum pressure in a high pressure fuel line?
When working with injection nozzles you should:
Technician A says that when checking injection nozzles you should check the cracking and closing pressures. Technician B says that you should check the spray pattern. Who is correct?
When mounting a fuel injection pump to an engine and adjusting the fuel pump drive so that pins will enter their respective holes in the flywheel and fuel pump, you are said to be ___________ the fuel pump to the engine.
What will occur if the cracking pressure in a nozzle is too low?
The most common injection nozzle used with direct injection is the:
On a rail design fuel system, what is the purpose of the restricted fitting in the return fuel line?
Which fuel injection system is used by Detroit 2 cycle diesels?
One advantage to a unit injection system is:
To determine if the fuel transfer pump for an injection system is operating efficiently you must test for:
On an engine equipped with a non-electronic diesel fuel system, when an operator moves the throttle through the speed ranges, he is altering the governor's.
On a fuel injection pump utilizing the port and helix system, what determines the position of the control edge of the helix?
On an in-line fuel injection pump utilizing the port and helix system, what maintains pressure for a rapid rise and fall of injection pressures?
On a test bench, when a technician adjusts a fuel pump so that each injection event occurs exactly the correct number of degrees apart he is said to be _________________ the fuel pump.
When a technician adjusts a fuel pump, when the rack rotates the plunger so that the vertical groove is aligned with the fill port, the pump is said to be in the:
On a port and helix fuel pump, when the rack rotates the plunger so that the vertical groove is aligned with the fill port, the pump is said to be in the:
On a port and helix fuel pump system, when the rack rotates the plunger so that the narrowest part of the helix is aligned with the fill/spill port, the pump is said to be in the:
Injection nozzles that open with the needle valve moving away from the combustion chamber are said to be:
An injection nozzle that has one main spray hole and an extra hole that directs its spray at the part of the combustion chamber is known as a _____________nozzle.
A fuel pressure gauge test on an engine may indicate:
An operator complains that his engine idle is about 100 RPM more that it was a few days ago, on his Detroit Diesel 8-92 2 cycle engine, what is the likely problem?
On some distributor type fuel systems, timing may be adjusted by:
In a distributor type fuel pump, the cam ring and plungers produce:
Before removing a fuel injection pump, you must locate the engine for timing and position so that the injection pump can be reinstalled in the correct position.
When servicing injectors, you should always remember to:
Injector timing on the Detroit unit injector system is considered to be correct when:
A distributor type pump uses a _________________ to control the delivery rate:
In a diaphragm type fuel transfer pump, the maximum possible pressure output would be limited by:
Caterpillar capsule type injectors are adjusted:
To check which cylinder is missing on an engine equipped with an inline injection pump and nozzles in the cylinder head, you would:
A fuel transfer pump:
Often the best volumetric efficiency of an engine is at the RPM where it develops peak torque.
Placing shims between the engine block and the ______________, will alter the timing on 855 cu.in. Cummins six cylinder engine.
The most common type of combustion chamber used in large trucks today is the:
What engine performance measurement is found by using the following formula: Torque x RPM divided by 5252:
As compared to a direct injection chamber, a engine equipped with pre-combustion chambers will:
On a diesel injected engine, if a delivery valve does not seat properly, the engine would:
Technician A says that a fuel injection pump with port and helix system uses a mechanical actuated injector. Technician B says that a distributor type fuel system uses a hydraulically actuated injector. Who is correct?
Technician A says that a Bosch and a Detroit fuel system both use a mechanical type injector. Technician B says that a Bosch and a Detroit fuel system both use a port and helix system. Who is correct?
Which of the following systems would a Cummins engine use to control the fuel injections to the engine?
The primary fuel filter on an engine is on the ___________ side of the fuel pump.
In a distributor type fuel pump, a hydraulically actuated plunger and counter-balancing spring, automatically moves the__________________ back and forth with changing engine speeds, to alter the injections timing advance.
To locate a faulty injector on a Cummins PT injection system you should:
The resistance of a liquid to flowing is called?
There is a delay between the time that fuel is injected into the cylinder and the time that ignition by the hot air takes place. The duration of this delay is expressed as a(n) _____________number:
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