Session 5: Tuning of Lubrication System of an Engine
Unit 5: Regular Maintenance of an Engine
Textual Question-Answers
Check Your Progress
A. Fill in the blanks
1. …………… is used for lubricating the engine of a vehicle.
Ans: Engine oil
2. The lack of …………… may lead to a noisy engine and alsochange the …………. of the engine due to increase in …………… .
Ans: lubrication, performance, friction
3. Change the …………. oil, if it looses viscosity or afterrecommended distance of ………. .
Ans: engine, running
B. Multiple choice questions
1. The engine lubrication system works on……………(a) pressurised lubrication system
(b) compressed air system
(c) mixed hydraulic system
(d) None of the above
Ans: (a) pressurised lubrication system
2. The role of oil filters and oil strainer in engine lubrication systemis to…………..
(a) filter the circulated lubricating oil
(b) filter the circulated fuel
(c) filter the circulated air-fuel mixture
(d) None of the above
Ans: (a) filter the circulated lubricating oil
3. If oil quality is good, it means……………….
(a) viscosity is high
(b) pressure is low
(c) lack of viscosity
(d) None of the above
Ans: (a) viscosity is high
C. Answer the following questions
1. Why is engine lubrication necessary?
Ans: Engine lubrication is necessary to reduce friction between movingparts, prevent wear and tear, cool the engine components, reduce noise, andincrease the life and efficiency of the engine.
2. What are the steps to be followed while checking the lubricationsystem?
Ans: The steps include checking engine oil level using dipstick, inspectingoil colour and viscosity, checking for oil leaks, ensuring proper functioningof oil pump, cleaning or replacing oil filter, and verifying oil pressure.
3. Why do leakages occur in lubrication systems?
Ans: Leakages occur due to worn-out gaskets or seals, loose oil drain plug, damaged oil filter, cracks in oil pipes, or excessive oil pressure in the lubricationsystem.
