1. What happens if gasoline is used in a Diesel engine?Diesel engine will work ?
2. Which Mechanism is used in Automobile gearing system
No, It will not work,as the Compression ratio of Petrol engine is 6 to 10 & that of Diesel engine is 15 to 22. Thus on such high compression, gasoline gets highly compressed & it may blast.
2. Which Mechanism is used in Automobile gearing system
Differential mechanism
3. Why different types of sound are produced in different bikes though they say run on SI engine
Engine specifications are different in different manufactures like as Bore Diameter(CC), Ignition timing.Also the exhaust passage take more responsible for sound.
4. Why entropy decreases with the increase in temperature?
ds=dQ/T
6. How to calculate bearing number to diameter of the inner and outer?
7. Explain Bicycle rear wheel Sprocket working?
8. Definition of Octane number & Cetane number?
14. Why entropy decreases with the increase in temperature?
Entropy is inversely proportional to the temperature so.as temp. increases,entropy decreases.
5. 1 hp how much watt?
746.2Watt
5. 1 hp how much watt?
746.2Watt
Divide the shaft diameter size by 5, it will give last two digitof the bearing no. and according to type of load we have tochose the type of bearing and that will give prior no. ofthe bearing.
Rear wheel sprocket works under the principle of ratchet and pawl.
Octane No.- Octane number is defined as the percentage, by volume, of iso octane in the mixture of iso octane and h-heptane. It is the measure of rating of SI engine.
Cetane No.- Cetane number is defined as the percentage, by volume, of n-cetane in the mixture of n-cetane and alpha methyl naphthalene. It is the measure of rating of CI engine.
9. Poisons ratio is higher in (rubber/steel/wood)When a material is compressed in one direction, it usuallytends to expand in the other two directions perpendicular tothe direction of compression. This phenomenon is called thePoisson effect. Poisson’s ratio is a measure of the Poisson effect.
9. Poisons ratio is higher in (rubber/steel/wood)When a material is compressed in one direction, it usuallytends to expand in the other two directions perpendicular tothe direction of compression. This phenomenon is called thePoisson effect. Poisson’s ratio is a measure of the Poisson effect.
For rubber = 0.5
For steel = 0.288
For wood < 0.2
Thus Poisson’s ratio is higher in RUBBER.
10. The Fatigue life of a part can be improved by?
Improving the surface finish by Polishing & providing residual stress by Shot peening.
11. When crude oil heated Which Hydro carbon comes first?
11. When crude oil heated Which Hydro carbon comes first?
Natural gas(Gasoline)… at 20 Celsius
12. 1hp=how much rpm?
12. 1hp=how much rpm?
We need Torque to find out.
Apply this formula:T = HP x 5252 rpm
13. which mechanism is used in automobile gearing system?T = torque (in lb-ft)
HP = horsepower
5252 = constant
rpm = revolutions per minute
Differential mechanism
Engine specifications are different in different manufactures like as bore diameter(cc),ignition timing.Also the exhaust passage take more responsible for sound.14. Why entropy decreases with the increase in temperature?
ds=dQ/T
Entropy is inversely proportional to the temperature so.as temp. increases,entropy decreases
15. What type of metal is used in a propeller
15. What type of metal is used in a propeller
Aluminium,stainlesssteel,magnesium bronze,NIBRAL(nickel,brass,aluminium)
16. Why involute curve used in gear
1) it’s smooth to drive the gear.
2) in gears contact is only point, this type is curve take the more load than normal one
17. How Trains take turns, though there is no any differential2) in gears contact is only point, this type is curve take the more load than normal one
Purpose of the differential is to enable vehicles to take turn, by allowing both the wheel to rotate with different speed. This is required when wheels, like in car, are connected with same axle. Interestingly, wheel in trains are not connected with the axle, they are independent and hence can take turns without ant differential. This is same as how the bullock cart takes turns, without any differential.
18. Why freezer in the fridge is placed in top level?
Because density of cold air is higher than warm air,hence itis placed at top.Cold air comes downward & cool the bottom part.
19. what is more dangerous longitudinal stress or Hoop stress and why?
Hoop stress is more dangerous than longitudinal stress, because the dangerous area coming under the hoop stress is circumferential,while in longitudinal,the axial area will come under dangerous area will will be less than circumferential area.So the hoop stress is more dangerous than longitudinal stress.
