Class 11 Automotive Service Technician Chapter 5 Regular Maintenance of an Engine Solutions English Medium As Per AHSEC New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters Class 11 Automotive Service Technician Chapter 5 Regular Maintenance of an Engine Question Answer and select need one. Class 11 Automotive Service Technician Chapter 5 Regular Maintenance of an Engine Notes Download PDF. AHSEC Class 11 Automotive Service Technician Question Answer English Medium.
Class 11 Automotive Service Technician Chapter 5 Regular Maintenance of an Engine
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. Class 11 Automotive Service Technician Chapter 5 Regular Maintenance of an Engine Textual Solutions are part of All Subject Solutions. Here we have given AHSEC Class 11 Automotive Service Technician Chapter 5 Regular Maintenance of an Engine Textbook Solutions English Medium for All Chapters, You can practice these here.
Regular Maintenance of an Engine
Chapter: 5
| SESSION 1: INSPECTION OF AN ENGINE |
| Check Your Progress |
A. Fill in the blanks:
1. For fuel leakage ______________, ______________ and ______________ must be checked in the engine.
Ans: Fuel tank exit, tank cap or rubber washer, loose fuel filter.
2. Check the hose pipe for ______________ or deterioration.
Ans: Distortion.
3. Inspect the radiator cap, neck and radiator core for ______________ leakage.
Ans: Coolant.
4. Inspect radiator hose clips for _____________, if leakage is noticed, ______________ the clips.
Ans: Looseness, tighten.
B. Multiple choice questions:
1. What is the power producing unit in an Automobile System?
(a) Engine.
(b) Chassis.
(c) Piston.
(d) Connecting rod.
Ans: (a) Engine.
2. Which colour indicates that there are chances of coolant leakage?
(a) Green.
(b) Blue.
(c) Yellow.
(d) None of the above.
Ans: (a) Green.
3. Engine is where fuel is burnt to create heat energy and that heat energy is converted into ____________________.
(a) Kinetic energy.
(b) Dynamic Energy.
(c) Static energy.
(d) Thermal energy.
Ans: (a) Kinetic energy.
C. Answer the following questions:
1. Why must leakages be controlled?
Ans: One must regularly check the engine for leakages as:
(i) The leakage of combustible gases can reduce the mileage and pick-up.
(ii) The leakage of coolants can affect the engine’s temperature and cause overheating, due to which the parts can deteriorate.
(iii) The leakage of the lubricating oil can increase the friction and reduce the engine’s power output. Such leakages must be repaired in time to avoid failure of the engine.
2. What are the steps to be followed while checking the leakages in an engine?
Ans: Selective Procedure to Check the Leakage in a Vehicle’s Engine:
(i) Keep the vehicle on a hard surface.
(ii) Open the engine bonnet and support it with a lever.
(iii) Inspect for external leakage of oil, coolant, gases, locate the area.
(iv) Inspect coolant tank and its connections.
(v) Inspect radiator hose clips for looseness and if leakage is noticed, tighten the clips.
(vi) Check hose pipeline for distortion and deterioration and replace.
(vii) Inspect radiator cap, neck and radiator core for coolant leakage.
(viii) Inspect torn thermostat housing gasket, which may cause leakage.
(ix) Inspect water pump seals and gaskets for coolant leakage.
(x) In case of fuel leakage inspect fuel tank exit, tank cap, rubber washer, flexible fuel line for slackness, torn fuel filter gasket, loose fuel filter, fuel pump connections, connectors, loose connections at nozzle or carburettor areas.
(xi) Combustion gases leakage can be traced by noticing black soot around cylinder head and block, torn cylinder head gasket, spark plug or nozzle, engine induction and exhaust manifold, valve guide or improper tappet clearance.
(xii) For lubricating oil leakage, set newspaper under engine, run engine for 5 minutes (without moving vehicle), locate spots on newspaper and fix leakage by replacing gasket, oil seal, etc.
| SESSION 2: WASHING OF AN ENGINE |
| Check Your Progress |
A. Fill in the blanks:
1. Latest engines are_______________ and fitted in a small area.
Ans: Compact.
2. ____________ is used for washing the engine.
Ans: Diesel sprayer.
3. Spray ____________ and remove the oily layers and muck water from an ____________.
Ans: Water, engine.
4. Liquid soap should be applied slowly in the ____________ where the hand can reach.
Ans: Area.
5. Do not clean the ____________ when it is hot.
Ans: Engine.
B. Multiple Choice Questions:
1. Which of these is required to clean the engine?
(a) Car washer.
(b) Compressor.
(c) Diesel sprayer gun.
(d) All of the above.
Ans: (d) All of the above.
2. What are the steps to clean or wash the engine?
(a) Keep the vehicle on hard surface.
(b) Unlock the engine bonnet and hold up it properly.
(c) Allow the engine to reach atmospheric temperature.
(d) All of the above.
Ans: (d) All of the above.
3. What type of precaution should be taken for washing of engine?
(a) Do not use high pressure to clean engine.
(b) Safeguard sensors, spark plugs, nozzle, and electronic gadgets from water.
(c) Do not give water pressure when engine is in running condition.
(d) All of the above.
Ans: (d) All of the above.
C. Answer the following questions:
1. Why is washing the engine necessary?
Ans: The latest engines are compact and fitted in a small area. It is necessary to clean the engine at regular intervals to take away oily layers, depositions of muck (mud and water), which may cause the engine heat and deteriorate its performance.
2. List the steps to be followed while washing the engine.
Ans: Steps to clean or wash the engine:
(i) Keep the vehicle on a hard surface.
(ii) Unlock the engine bonnet and support it with a lever.
(iii) Inspect for external leakage of oil, coolant, gases, locate the area.
(iv) Allow the engine to reach atmospheric temperature.
(v) Separate the negative terminal of the battery for protection.
(vi) Use a diesel sprayer and spray only on oily layers of the engine.
(vii) Control the car washer and set the water spraying nozzle at a low force.
(viii) Spray the water and remove the oily layers and muck water from the engine.
(ix) Take some liquid soap and apply the soap gradually in the area where the hand can reach.
(x) Clean the engine externally with low water pressure.
(xi) Also clean the bonnet area and engine room.
(xii) Start the compressor and give air pressure to remove the water from the electrical and electronic gadgets.
(xiii) Allow the engine to dry.
(xiv) Connect the battery terminal and start the engine, checking for smooth working.
| SESSION 3: TUNING FUEL SYSTEM OF AN ENGINE |
| Check Your Progress |
| SESSION 4: TUNING OF IGNITION SYSTEM OF AN ENGINE |
| Check Your Progress |
| SESSION 5: TUNING OF LUBRICATION SYSTEM OF AN ENGINE |
| Check Your Progress |
| SESSION 6: TUNING OF COOLING SYSTEM OF AN ENGINE |
| Check Your Progress |
| SESSION 7: TIGHTENING OF FASTENERS (NUTS, BOLTS AND SCREW) |
| Check Your Progress |
| SESSION 8: ENGINE TIMING (TUNING) |
| Check Your Progress |
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