Set 16 - MEO class 4 motor questions

1. Exhaust Grouping is required in case of ______________ turbocharging in order to _____________________
choose one Constant pressure , prevents shockwave generation Pulse pressure , prevent interference with scavenging of other cylinders Constant pressure, prevent interference with scavenging of other cylinders .Pulse pressure , prevents shockwave generation

2. Function of a de-superheater is to :
choose one Protect superheater from overheat Control superheater steam outlet temperature Increase the efficiency of the boiler Reduce steam temperature for auxiliary uses after steam superheater

3. Which of the following statements is false?
choose one Oxidation of lubricant leads to decrease in its viscosity Formation of oxidation acids, sulfuric acid leads to depletion of TBN of lubricant Contamination with water will lead to decrease in the load carrying capacity of a lubricant . Build up of insolubles will lead to increase in viscosity of a lubricant

4. After prolonged operation, jerk type fuel pumps wear on the top edge of plunger and edges of spill ports and helix due to erosion by high pressure fuel as it spills. This wear would result in _________________
choose one Late start of injection and early end of injection Early start of injection and late end of injection Early start of injection and early end of injection Late start of injection and late end of injection

5. Which of the following conditions is responsible for the fuel oil to atomize when using a steam atomizer in anauxiliary boiler?
choose one Expansion of the steam in the furnace. Expansion of the steam in the whirling chamber. Expansion of the steam in the orifice plate All of the above.

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Correct answers: