Class 11 Automotive Service Technician Chapter 7 Regular Maintenance of Gearbox 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 7 Regular Maintenance of Gearbox Question Answer and select need one. Class 11 Automotive Service Technician Chapter 7 Regular Maintenance of Gearbox Notes Download PDF. AHSEC Class 11 Automotive Service Technician Question Answer English Medium.
Class 11 Automotive Service Technician Chapter 7 Regular Maintenance of Gearbox
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 7 Regular Maintenance of Gearbox Textual Solutions are part of All Subject Solutions. Here we have given AHSEC Class 11 Automotive Service Technician Textbook Solutions English Medium for All Chapters, You can practice these here.
Regular Maintenance of Gearbox
Chapter: 7
| SESSION 1: LUBRICATION OF GEARBOX |
| Check Your Progress |
A. Fill in the blanks:
1. Lubricating oil is used for_____________.
Ans: Reducing friction.
2. Lubrication removes ________ from engine.
Ans: Contaminants.
3. Replace the_________at the manufacturer recommended interval.
Ans: Lubricating oil.
B. Multiple choice questions:
1. In motorcycles, lubricating oil should be changed after _____________.
(a) 2,000–3,500 km.
(b) 4,000–5,000 km.
(c) 7,000–8,000 km.
(d) None of the above.
Ans: (a) 2,000–3,500 km.
2. In cars, the lubricating oil should be changed after _____________.
(a) 10,000–15,000 km.
(b) 25,000–27,000 km.
(c) 3,000–5,000 km.
(d) None of the above.
Ans: (a) 10,000–15,000 km.
3. Steps for changing lubrication of gearbox include _____________.
(a) Checking for leakage of oil from the gearbox.
(b) Checking the level of lubricating oil in the gearbox by loosening the oil level.
(c) Bolt when the gearbox is filled with correct quantity of oil.
(d) All of the above.
Ans: (d) All of the above.
4. Basic steps for changing the lubricating oil include __________________.
(a) Placing the container below the drain plug of gearbox.
(b) Opening the filler and drain plug and leaving it for appropriate time.
(c) Replacing the washer of drain plug and tightening it to the specified torque.
(d) All of the above.
Ans: (d) All of the above.
C. Answer the following questions:
1. What is a gearbox?
Ans: A gearbox is a mechanical unit that contains a set of gears arranged in a specific manner to transmit power from the engine to the wheels in a vehicle. It controls the speed and torque of the vehicle by changing gear ratios, allowing the driver to adjust the power output as needed. The gearbox helps the vehicle speed up smoothly, delivers power efficiently, and gives better control in different driving situations.
2. Differentiate between oil and coolant.
Ans: The differences between oil and coolant are as under:
| Oil | Coolant |
| Oil is used for lubricating the engine to reduce friction and wear of the parts. | Coolant is used to maintain the temperature of the engine and prevent overheating. |
| Lubricates engine parts to reduce friction. | Removes heat from the engine to prevent overheating. |
| Lubricates engine parts. | Cool, engine, prevents overheating. |
| Circulates through engine block, cylinder heads, crankshaft, camshaft, bearings, pistons, etc., via the oil pump and oil galleries. | Circulates through the engine block, cylinder head, radiator, heater core, and hoses, driven by the water pump. |
| Engine oil, gear oil. | Antifreeze, coolant mixture. |
3. Name the tools used for changing coolant in a vehicle.
Ans: Tools used for changing coolant are screwdriver, spanner, drain pan, gloves and cloth.
| SESSION 2: SETTING OF GEARBOX |
| Check Your Progress |
A. Fill in the blanks:
1. More play in gear linkage causes _____________.
Ans: Wear and tear.
2. When gearbox increases ____________ in transmission of power, heat is produced in meshing gears.
Ans: Tractive efforts.
3. In a two-wheeler, the lubricating oil should be changed at every ______ km.
Ans: 2000-3,500.
4. Check the level of lubricating oil in the _______ by loosening the oil level bolt.
Ans: Gearbox.
B. Multiple choice questions:
1. Which of these is not a component of the gearbox?
(a) Gear linkage.
(b) Gear lever.
(c) Gear shifter lock.
(d) Piston.
Ans: (d) Piston.
2. What should align with shifting sleeve on the main shaft?
(a) Gear.
(b) Gear shifter fork.
(c) Gear linkage.
(d) Gear lever.
Ans: (a) Gear.
3. For easy shifting of gears, it is necessary to regularly lubricate the _________________.
(a) Thrust washer.
(b) Gear linkages.
(c) Spanner.
(d) Bolt.
Ans: (b) Gear linkages.
C. Answer the following questions:
1. What is the function of a gearbox?
Ans: The functions of gearbox are as under:
(i) The gearbox transmits engine power to the wheels.
(ii) It helps overcome resistances like gradient, air, and load resistance.
(iii) It controls speed and torque by changing gear ratios.
2. What are the different combinations in gearbox?
Ans: Different combinations in gearbox are:
(i) Gear with shifting sleeve.
(ii) Gear shifter fork with shifting sleeve.
(iii) Synchronising ring with synchronising cone.
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