ATD-Advanced technology demostration MCQ Unit -3
Q1-Scavenging air in diesel engine means A) Air used for combustion sent under pressure B) Forced air for cooling cylinder C) Burnt air containing products of combustion D) Air used for forcing burnt gases out of engine's cylinder during the exhaust period Answer D Q2-The pressure at the end of compression in the case of diesel engine is of the order of A 6 kg/cm2 B 12 kg/cm2 C 20 kg/cm2 D 35 kg/cm2 Answer D Q3- The thermal efficiency of a diesel cycle having fixed compression ratio, with increase in cut-off ratio will A Increase B Decrease C Be independent D May increase or decrease depending on other factors Answer B Q4-The fuel in diesel engine is normally injected at pressure of A 5-10 kg/cm2 B 20-25 kg/cm2 C 60-80 kg/cm2 D 90-130 kg/cm2 Answer D Q5-Compression loss in I.C. engines occurs due to A Leaking piston rings B Clogged air-inlet slots C Increase in clea...