One cylinder of diesel engine receives more fuel than other then for t...
And 3.
When one cylinder of a diesel engine receives more fuel than the others, it can lead to an imbalance in the combustion process. This can result in a smoky exhaust due to incomplete combustion of the excess fuel (option 1). Additionally, the increased fuel input can cause the combustion temperature in that cylinder to rise, leading to a higher exhaust temperature (option 3).
However, the other options are not directly related to the issue of one cylinder receiving more fuel. Piston rings sticking into piston grooves (option 2) can occur due to various reasons unrelated to fuel imbalance. Engine overheating (option 4) can be caused by several factors such as coolant issues or a malfunctioning cooling system, which are not directly related to fuel distribution. Scavenging (option 5) refers to the process of purging exhaust gases from the combustion chamber, which is not directly influenced by fuel distribution either.