Lubrication System Functions and Losses

The video tutorial discusses the importance of lubrication in internal combustion engines, highlighting the significant power loss due to friction and other factors like blow by and pumping losses. It explains that a proper lubrication system is essential to minimize these losses by reducing friction, sealing engine parts, and providing cooling. The tutorial also outlines the basic requirements of a good lubrication system, emphasizing the need for effective sealing and cooling without leaving deposits.

What is the primary reason for power loss in an internal combustion engine?

• Incomplete combustion

• Poor air intake

• Excessive fuel consumption

• Friction between engine parts

What is the difference between indicated power and brake power?

• Indicated power is the power utilized

• Indicated power is less than brake power

• Indicated power is more than brake power

• Indicated power is the power lost

Which type of power loss occurs when combustion products leak past the piston rings?

• Thermal loss

• Pumping loss

• Blow-by loss

• Frictional loss

Which type of loss is associated with the intake and exhaust strokes in an engine?

• Frictional loss

• Blow-by loss

• Thermal loss

• Pumping loss

What does frictional power represent in an engine?

• The power used for fuel injection

• The power used for cooling

• The power generated by the engine

• The power lost due to various factors

What is the main function of a lubrication system in an engine?

• To minimize friction and wear

• To increase engine speed

• To enhance fuel efficiency

• To reduce exhaust emissions

Which of the following is NOT a function of a lubrication system?

• Sealing engine parts

• Minimizing friction

• Increasing fuel consumption

• Cooling engine parts

How does a lubrication system help in reducing blow-by losses?

• By increasing engine temperature

• By sealing between rings and cylinder walls

• By reducing fuel consumption

• By enhancing air intake

What is a key requirement of a good lubricant in an engine?

• It should reduce engine speed

• It should leave deposits on engine parts

• It should provide effective cooling

• It should increase engine noise

Why is it important for a lubricant to not leave deposits on engine parts?

• To increase engine speed

• To enhance exhaust emissions

• To ensure smooth operation

• To reduce fuel consumption