Recent questions tagged automobile-transmission-system

Description : Distinguish among radial ply, cross ply & belted bias types tyres

Last Answer : Sr. No. Radial ply tyre Cross ply tyre Belted bias Type  1 Plies are running radially straight from bead to bead Piles are running diagonally opposite from bead to bead. The basic construction is ... tyre. Costlier than radial ply & cross ply tyre 8

Description : Describe with sketch construction of tubeless tyre & state its two advantages over Tube type

Last Answer : This type of tyre does not need separate tube, instead the air under pressure is filled in the tyre for which purpose a non return valve is fitted to the rim. The tyre is directly mounted on the ... safety:- in case of puncture air defuses slowly which provide safety to driver as well as other.

Description : Describe with neat sketch working of full floating type.

Last Answer : Fig:- full floating Rear axle Explanation: The figure shows the full floating axle. The wheel is on the axle casing. Two roller bearings are between the wheel and axle casing. ... supported by the wheel and the axle casing. Fully floating rear axle is used in heavy commercial vehicles 

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  

Description : Describe with schematic diagram working of constant mesh gearbox

Last Answer : -In constantmesh gearbox all the gears on the mainshaft are constantly mesh with layshaft gear & freely rotate on mainshaft. -When the clutch is in engaed position & gears ... than direction of mainshaft becomes reverse & reverse gear ratio obtained which is near about 3:1

Description : Describe with sketch the method of lubrication of synchromesh gearbox

Last Answer : Splash lubrication system : The splash lubricating system is simple to manufacture and implement in synchromesh gearbox. Lay shaft gear revolutions splash up lubricant from the sump to provide adequate ... the gear box 3. Selector mechanism is lubricated by thin machine oil/engine oil

Description : In modern car synchromesh gearbox is preferred over constant mesh gearbox. Justify its application with suitable illustration

Last Answer : Reason of synchromesh gear box preferred over constant mesh gearbox  1) No need of double declutching as in case of constant mesh gearbox.  2) Smooth engagement of higher gears due to synchromesh ... lay shaft gears to main shaft gear and then to the main shaft through synchronizer device 

Description : What are the different materials used for clutch lining? State its necessity.

Last Answer : Material:- 1. Leather 2. Cork 3. Fabric 4. Asbestos 5. Reybestos and Ferodo 6. Non- asbestos clutch lining material Necessity:- 1. It should have good anti fading characteristic 2. It should have longer life. 3. It should be nonpolluting. 4. It should have lesser cost

Description : Compare dry clutch & wet clutch on basis of

Last Answer : Parameter Dry Clutch Wet Clutch Construction When the clutch is operated dry i.e. without oil, it is called as a dry clutch. When the clutch is operated in an oil bath, it is ... , Bus, Truck etc. Multi-plate clutch is used in motor cycles, racing cars, heavy duty vehicles.

Description : Describe with neat sketch construction details of clutch plate.

Last Answer : Fig:- Single Plate Clutch Constructional details : It consist of steel plate with a splined central hub. Annular friction facing are attached to the steel plates by rivets. Special resins are ... are similar type of slots in each of the two plates situated on either side of the hub flang 

Description : Describe advantages of torque converter over manual transmission system

Last Answer : Advantages of torque converter : 1. Torque converter varies gear ratio in the range of 3:1 to 1:1 in infinite no. of stages which gives uniform acceleration 2. No need of operating ... avoiding manual interference of gear changing. 4. It allows starting & stopping vehicle without any difficulty.

Description : Describe the working of motorcycle clutch with neat sketch.

Last Answer : Working : While the flywheel is rotating the pressure plates rotate and press against the friction plate. This causes the friction plates and thus the clutch shaft to rotate as well. When the pedal is ... they are not fully pressed by pressure plates. Thus the shaft also stops rotation. 

Description : Illustrate with the sketch functional relationship of major components of power transmission system

Last Answer : Fig:- major assembly & There location on chassis frame 1. Chassis Frame: - it is backbone of vehicle. all sub systems mounted on chassis frame 2. Engine:-it is heart of vehicle ... 7. Wheels & Tyres:-it carry weight of vehicle , transmit driving thrust, absorb road shocks

Description : Sketch a layout of Front Engine Rear Wheel Drive vehicle & label the major parts

Last Answer : Fig:- Front EngineRear Wheel Drive Vehicle Layout

Description : Explain construction of Hotchkiss drive with suitable sketch

Last Answer : Hotchkiss drive: Explanation: Construction:- This drive is invented by Albert Hotchkiss. In the Hotchkiss drive two universal joints are used one at front and second at rear end of propeller shaft ... torque reaction leaf spring deflects. It is used in heavy duty vehicles like bus and trucks.

Description : Describe working of continuously variable transmission with suitable sketch

Last Answer : A Vario-drive consists of two set of split pulleys - drive and driven pulley and drive belt between the pulleys. The drive pulley is fitted to the crankshaft and driven to rear wheel ... driven pulley gets decreased thus a reduced drive ratio between the driven and drive pulleys is obtained.

Description : Describe with schematic sketch working of Vacuum operating clutch mechanism

Last Answer : Fig:- Vacuum Operated Clutch linkage -Vacuum operated clutch linkage operated by engine Vacuum created during suction stroke -It consists of vacuum reservoir tank connected to engine ... piston & plunger which further connected to release fork & release bearing as shown in fig

Description : Explain any one type of Frame section with neat sketch

Last Answer : four section of chassis frame with their merits Channel Section: The channel section is used for making the long members of the frame. It provides a good resistance to bending. It is poor ... to torsional loading (twisting) and they shall not use in the cases where torsion is dominant. 

Description : Explain the concept of Aspect Ratio.

Last Answer : Aspect Ratio: The aspect ratio of a tyre is the height of the tyre sidewall expressed as a percentage of the tyre’s width. For example, a tyre with a profile/aspect ratio of 65, is a tyre whose height is equal to 65% of its width. 

Description : State the function of Slip joint & universal Joint

Last Answer : 1)Slip joint Functions: When the rear wheel comes across a bump, the spring compresses or expands as the differential with the rear axle housing and the wheel moves up and down. This ... drive changes continuously and universal joint allows transmission of power and rotary motion at a varied angle

Description : State the purpose of Transfer case

Last Answer : 1. Transfer case is used in four wheel drive vehicle along with main gearbox to transmit torque and power to the rear axle. 2. It enables the driver to drive the vehicle in two wheel drives on ... applications.  3. It also enables to drive the vehicle in high gear or low gear whenever required.

Description : Write a function of Automobile Clutch

Last Answer : To engage and disengage the engine power from transmission as required when the vehicle is to stop by applying brakes. To facilitate the easy gear shifting from 1st to 2nd or from ... in transmission by providing suitable means. To reduce the vibrations during high speed power transmission

Description : Enlist different material used in Frames

Last Answer : 1) Mild steel 2) Carbon steel 3) Nickel alloy steel 4) Aluminum alloy. 02 

Description : State the necessity of Frame in Automobile.

Last Answer : 1. To support the body and chassis components such as engine, gear box, axles, suspension system, braking system etc. 2. To withstand different types of loads acting on it