Question

Improper fuel injection of your stationary diesel engine may be due to:

1. leak nozzle
2. fuel pump wear
3. piston blowby
4. worn injector orifices
5. leaking pump check valve
6. clogged air vents
Select one:
a. 1, 2, 4, 5
b. 1, 2, 3, 5
c. 1, 3, 4, 5
d. 1, 2, 4, 6

Answer 1

Improper fuel injection in diesel engines can be due to leaky nozzles, fuel pump wear, worn injector orifices, and leaking pump check valves. Piston blowby and clogged air vents are not directly related to fuel injection. The correct answer, encompassing issues directly affecting fuel injection, is options 1, 2, 4, and 5.

Step-by-step explanation:

Improper fuel injection in a stationary diesel engine can be caused by a variety of issues. Some possible reasons include a leaky nozzle, which can prevent the proper amount of fuel from being delivered to the combustion chamber. Additionally, fuel pump wear could lead to inadequate fuel pressure and consequently poor injection. Another factor might be worn injector orifices, leading to incorrect fuel spray patterns, and a leaking pump check valve may result in fuel delivery issues. In contrast, piston blowby and clogged air vents are not typically direct causes of improper fuel injection, as they relate more to the combustion and air intake aspects, respectively. Therefore, the correct combination of issues leading to improper fuel injection would be options 1, 2, 4, and 5, making (a) the correct answer.