What is the logic in lubrication oil pump system?

What is the logic in lubrication oil pump system?
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Normally main oil pump (MOP) will feed the required lub oil to turbine governor and lubrication. If the pressure drops to 5.3 kg/cm2 6.6 kV 373 kW Aux. Oil Pump will start. If further pressure falls to <0.65 kg/cm2 Flushing Oil Pump will start. If further pressure drops <0.35 kg/cm2 Emergency Oil Pump will start. Lubricating oil inlet temperature will be 40°C and outlet temperature will be 70°C. 
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A journal bearing with hydrodynamic lubrication is running steadily with a certain amount of minimum film thickness. When the load and speed are doubled, how does the minimum film thickness vary? [IES-2008] (a) Remains unchanged (b) Gets doubled (c) Gets reduced to one-fourth of original value (d) Gets reduced to half of original value

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In hydrodynamic lubrication, film thickness remains unaffected by change in speeds. a) True b) Increase with increase in speed c) Decrease with increase in speed d) Disappear as the speed tends to infinty

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Last Answer : (C) Hydrostatic

I Understand Lubrication Is Essential, But What Is Its Main Role?

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Last Answer : Lubricant is used to establish and maintain a micro-thick separating film between rotating and static parts, so that the bearing can perform well, have long life, and keep from being damaged.

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Description : Apart from feed heating, what should a plant have to obtain a gain in thermal efficiency? a) Lubrication b) Differential heating c) Reheating cycles d) Regenerative cycles

Last Answer : c) Reheating cycles

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Last Answer : b) Split bearing are needed for practical purpose

Lubrication of ERC and inserts in corrosion prone areas and platform line is done:- (a) Once in a month. (b) Once in a fortnight. (c) Once in a week. (d) Once in a year.*

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Last Answer : (d) Once in a year.*

Describe a method of lubrication for rear axle assembly of the truck.

Description : Describe a method of lubrication for rear axle assembly of the truck.

Last Answer : The combined lubrication system is very important in the final drive axle, where load and or speed transferred are high, the combination of splash and force feed of lubricant is delivered to ... trickles down due to gravity into the sump, where it is collected again and the cycle repeats  

Describe with sketch the method of lubrication of synchromesh gearbox

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Description : Explain boundary lubrication with diagram.

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Explain fluid - film lubrication with diagram.

Description : Explain fluid - film lubrication with diagram.

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A micropocessor consists of: a) Arithmetic Logic Unit (ALU) b) Memories c) Input / Output devices d) All the above

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Last Answer : Ans: A