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

1 Answer

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 rim and retains the air. The inner construction of tyre is almost the same as that of tubed tyre, except that it is lined on inside with a special air-retaining liner.

It consist of two main parts i.e. carcass and tread. The carcass is basic structure taking mainly the various loads and consists of a number of piles wounded in a particular fashion from the cards of rayon or any other suitable material. The tread is a part of tyre, which comes in contact with the road surface when the wheel rotates. It is generally made of synthetic rubber.

The design of tyre treads depends on various tyre properties like grip, noise and the wear. Between the bead and the tread, outer rubber covering and the carcass is called the sidewall. At the inner edges, beads are formed by reinforcing with steel wires. All piles are tied to the beads, which prevent any change of shape.

 image


Advantages:-

1) Lesser unsprung weight-due to lack of tube weight reduce & increase fuel efficiency .

2) Better cooling:-hence there is no tube heat directly transferred to rim which provide better cooling.

3) Comfortable ride:-in tubeless tyre shocks & vibration absorbed effectively which increase driving comfort.

4) Slower Leakage of air:- in case of puncture air retaining liner hold nail in position & prevent sudden air diffusion.

5) Simple assembly:-Only the tyre has be fitted on rim

6) Improve road safety:- in case of puncture air defuses slowly which provide safety to driver as well as other.

Related questions

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 : 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 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 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 : 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 : 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 : 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 : 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 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 : 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 : 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 : 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 : 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 : 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 : 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 : 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 : 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

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 : 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 effect of Inflation pressure on the life of the tyre. With a sketch explain tyre rotation procedure and its necessity.

Last Answer : Effects of Under-inflation: 1. Uneven tread wear, more wear at tyre sides. 2. Lack of directional stability. 3. Increased rolling resistance leading to increased fuel consumption. 4. ... axle, while the drive axle tyres are brought straight to the free rolling axle (without crossing). 

Description : Tubeless tyres are made of __________ rubber, which is a co-polymer of isoprene & isobutylene. (A) Nitrile (B) Silicone (C) Neoprene (D) Buty

Last Answer : (D) Buty

Description : Draw sketch of Bourdon tube pressure gauge and state its advantages.

Last Answer : Advantages:  • These give more accurate results. • Bourdon tube cost low. • Bourdon tube are simple in construction. • They can be modified to give electrical outputs. • They are safe even for high pressure measurement. • Accuracy is high especially at high pressures.

Description : Which is better for a mountain bike? Tubed or tubeless tires? Any experiences ?

Last Answer : Never tried the tubeless but I think the main difference would be weight.

Description : Is it possible to know it? I have a favorite

Last Answer : Most "wheels" have tubeless tires (TubeLess is written on them). But you can also put a soul in them - so you don't know the real assembly from the outside.

Description : Can i have tubeless tires on a mountain bike if my rims are bent?

Last Answer : Depends on:if your rims are made to be used as tubeless to start withhow they're bentIf it's an overall bend of a big part of the rim - as in the wheel being out of true - then tubeless will still ... work. You need a good fit between the bead of the tire and the rim to be able to run tubeless.

Description : Can i have tubeless tires on a mountain bike if my rims are bent?

Last Answer : Depends on:if your rims are made to be used as tubeless to start withhow they're bentIf it's an overall bend of a big part of the rim - as in the wheel being out of true - then tubeless will still ... work. You need a good fit between the bead of the tire and the rim to be able to run tubeless.

Description : Draw the sketch of multiplate clutch and describe its construction and working. 

Last Answer : Multi - Plate clutch consists of a number of clutch plates instead of only one clutch plate like in the Single plate clutch. Friction surface also increased because of a number of clutch plates. Because of number of friction ... T = n.μ.W.R where R = Mean radius of the friction surfaces

Description : Describe with neat sketch the construction and working of surface condenser

Last Answer : Construction- It consists of horizontal cast iron cylindrical vessel pack with tubes, through which the cooling water flows. The ends of the condenser are cut off by vertical perforated type plates into ... ; the secondary function of condenser is to supply pure and hot feed water to boiler.  

Description : Describe the construction of gear drive of camshaft drive arrangement with sketch.

Last Answer : Gear Drive of Camshaft Drive: Camshaft is driven by the crankshaft either by a pair of meshing gears (timing gears) or by means of a pair of timing sprocket connected by a chain ... and crankshaft to ensure opening the valves exactly at the correct time in relation to piston position. 

Description : Describe the construction and working of D-MPFI and L-MPFI with help of neat sketch.

Last Answer : D-LMFI System: It is Manifold fuel injection system.In this type, the vacuum in the intake manifold and volume of air by its density are sensed in this type of MPFI system .As air enters into ... intake manifold , the air flow sensor measures the amount of air and sends information to ECU.

Description : Describe construction and working of TBI system with suitable sketch.

Last Answer : Construction and working of TBI system: Throttle Body Injection is an electronically controlled injection system in which an electronic fuel injector injects the fuel intermittently in to the intake manifold ... to calculate the triggering signals for the injectors and other system actuators.

Description : Describe in brief with neat sketch construction of tunnel with needle beam method

Last Answer : In this method stout timber beam known as needle beam is used which forms the main temporary support during the excavation. Construction steps: (a) First of all a small drift of about 1 1 m is ... . (d) After excavation, the lining is provided to the tunnel section and mucking is done. 

Description : Describe with neat sketch the construction and working principle of MOSFET.

Last Answer : Construction and working principle of MOSFET:  A) Depletion type MOSFET: Construction: The N-channel depletion type MOSFET is formed on P-type silicon substrate with two heavily ... accumulation of electrons and hence more current. Thus the MOSFET is a gate voltage controlled device.

Description :  Describe the construction of high pressure mercury vapour lamp with neat sketch

Last Answer : Construction:-  It consists of an inner bulb generally of silicon, to withstand high temperatures. The bulb contains a small quantity of mercury and argon. It is protected by outer glass, this ... : The function of power factor improvement capacitor is to improve the power factor 0.5 to 0.95

Description : Describe with neat sketch working of air compressor used in automobile workshops. State its two advantages

Last Answer : As shown in ig. Shows two stages reciprocating air compressor with water cooled and intercooler First of all fresh air is sucked from atmosphere in low pressure (L.P) cylinder during its suction ... :  1) Less power is required to drive the compressor.  2) Higher volumetric efficiency 

Description : Sketch and describe pressure measurement system for 800 mm pressure, that contain Bourdon tube and LVDT.

Last Answer : Diagram: Explanation: The pressure measurement using bourdon tube and LVDT is shown in above figure. In this the, the bourdon tube act as primary transducer and LVDT which follows ... This set up is used for measurement of pressure which is converted into electrical signal by LVDT.

Description : Draw and describe construction and working of Bourdon tube.

Last Answer : Construction and working : C type bourdon tube is made up of an elliptically flattened tube bent in such a way as to produce the C' shape as shown in the figure. One end (free ... displacement can be indication of applied pressure. Accuracy of this element is higher than C' type element.

Description : Explain with sketch working of electronic petrol injection system. State its advantages over carbureted fuel system. 

Last Answer : Working of Electronic Fuel injection system: Because mechanical injection systems have limited adjustments to develop the optimal amount of fuel into an engine that needs to operate under a variety of different ... (acceleration). 7. Compact design of fuel supply system. 8. Modular design

Description : Explain with neat sketch working of direct drive SWT. Give any two advantages of it over geared type SWT.

Last Answer : Direct Drive SWT: This plant has no gear box. Turbine blades are very light weight made up of stiff carbon fibre material. Blades are flat shaped. Due to this shape, lift increases. ... needed is less 4. More reliable 5. Better performance 6. Light weight 7. Less maintenance

Description : Explain with neat sketch; the construction and working principle of Repulsion type moving iron instrument.

Last Answer : Repulsion Type Moving Iron Instrument: Construction: It consist of fixed cylinder hollow coil which carries operating current inside the coil there are two soft iron pieces. One of which is ... magnetized with same polarity a repulsive force act on them and moving iron piece gets deflected. 

Description : State with neat sketch the construction of three phase autotransformer.

Last Answer : Operation: Working principle is based on self-induction. When three-phase ac supply is given to star connected three windings, flux is produced and gets linked with each phase winding. The emf ... . Depending upon the position of variable terminal, we get variable AC voltage at the output.

Description : Which type of tyre is needed as a visitor to Germany.

Last Answer : Winter tyres are a legal requirement in Germany. This is national legislation and as a visitor you can fit tyres that meet your own country's requirements. However you can be given an on the ... to unsuitable tyres. For example if you are going into mountainous regions you will need snow chains.

Description : Explain with neat sketch construction of PIN Diode. Draw its characteristics in reverse bias mode. 

Last Answer : Construction A PIN diode is made up of three semiconductor materials; two heavily doped P- and N- type material separated by an intrinsic (undoped) semiconductor (I) as shown in above figure ... . This advantage allows the PIN diode to process even weak signals.  Characteristics

Description : Sketch the construction of tunnel diode and write its operation.

Last Answer : Construction: Applications: • In digital networks. • As a high speed switch. • As a high frequency oscillator. • As a logic memory storage device. • In relaxation oscillator circuits.

Description : Sketch construction of N-channel JFET and explain its operating principle.

Last Answer : Construction of N-channel JFET: Working of N channel FET: a)when VGS is zero,ID flows because of VDS b)Now when VGS increases towards negative, depletion layer also increases on both sides. c)so VGS control drain current ID d)so it is called as field effect Transistor

Description : Write the procedure of construction of WBM road with neat sketch showing various components

Last Answer : Construction Procedure:  a) Preparation of Foundation: The foundation for receiving the layer of WBM may be either the sub-grade or sub-base or base course. The depressions and pot holes on the existing road ... water and rolled. No traffic is allowed till WBM layer sets and dries out.