Subtopic: I.C. engine systems – fuel, cooling, lubrication, ignition, electrical, intake and exhaust
Question Statement:
An engine is to be run in dual fuel mode using diesel and producer gas with diesel as pilot fuel. Operation NOT required while running the engine is
Options:
(A) cooling of the producer gas
(B) cleaning of the producer gas
(C) preheating of the producer gas
(D) mixing of producer gas with air
Official Answer Key:
C
Step-by-Step Solution & Explanation
In dual-fuel (diesel-pilot + producer gas) operation, the producer gas coming from the gasifier is hot, laden with tar/particulates, and must be cooled (to increase its density and volumetric energy content) and cleaned (to remove tar, dust and moisture that would foul the engine) before being mixed with intake air and drawn into the cylinder, where diesel is injected as the pilot/ignition source. Preheating the producer gas is not required — in fact it is counter-productive, since a cooler, denser gas–air charge gives better volumetric efficiency and power output. Hence (C) is the operation that is NOT needed.
Practice This in Real CBT Exam Interface
Test yourself with the official TCS-iON palette, virtual calculator, and immediate performance analytics.