saurabhjain

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Everything posted by saurabhjain

  1. Why parabolic fins are preferred ? You can answer this question.You can like the best answer.You can share the questionYou can get updates of new questions on Facebook linkedin twitter & google plus
  2. VALVE TIMING DIAGRAM

    From the album Engineering images

    The above diagram is for a Caterpillar series 3600 turbo charged after cooled engine. As can be seen from the timing diagram, the induction stroke commences when the inlet valve opens 10° before TDC when air is drawn into the cylinder as the piston moves down. The inlet valve closes 1° before BDC. The air is now trapped in the cylinder and as the piston rises on the compression stroke, the air is compressed. As the air is compressed, it rises in temperature. When the piston reaches 19° before TDC, the injection of fuel commences and continues until 73° after TDC. The heat in the compressed air ignites the fuel and combustion takes place. The gases expand forcing the piston down on the power stroke. The exhaust valves opens at 26° before BDC and the exhaust gases commence and are discharged as the piston rises on the exhaust stroke. Most of the exhaust gases have been discharged as the piston nears TDC. However, at 10° before TDC, the inlet valve opens and air enters the cylinder and helps discharge any remaining exhaust gases until the exhaust valve closes at 3° after TDC. The whole cycle is then repeated. Both the exhaust valve and inlet valve are open from 10° before TDC to 3° after TDC, an overlap of 13°. This is referred to as “valve overlap” and ensures that all the exhaust gases are discharged from the cylinder and the cylinder receives a fresh charge of air to make it more efficient when combustion next takes place. Therefore there is one power stroke for every cycle or two revolutions of the crankshaft.
  3. What is difference between stress and pressure?
  4. What are Herringbone gears and what for these are used ? 1. You can answer this question 2. You can like the best answer 3. You can share the question.
  5. Six stroke engine

    From the album Engines

  6. You know that diesel engine is the most appropriate choice of the engineers when it comes to drive heavy automobile like trucks, aircraft, ships etc. But what makes it so torque, is it the engine design, working cycle or something else. Please share your deep analysis to answer this questions
  7. Why should a chain drive be used over a belt or rope driven drive? State pro`s and con`s? 1. You can answer this question 2. You can like the best answer 3. You can share the question.
  8. View this quiz Production engineering quiz 1 lets check your knowledge on production engineering Submitter saurabhjain Time 10 minutes Type Graded Mode Submitted 05/03/2017 Category Mechanical Engineering Quiz  
  9. View this quiz Machine Design Quiz 1 Questions on the concepts of Machine Design Submitter saurabhjain Time 5 minutes Type Graded Mode Submitted 04/21/2017 Category Mechanical Engineering Quiz  
  10. View this quiz Automobile Engineering Quiz 1 Questions on the concepts of automobile engineering. Submitter saurabhjain Time 5 minutes Type Graded Mode Submitted 04/20/2017 Category Automobile Engineering  
  11. What is the difference between design and drafting ? Explain with example..
  12. What is the difference between pump and compressor ? When we use pump and When we use compressor? You can answer this questionYou can like the best answerYou can share the question.....You can get updates of new questions on Facebook linkedin twitter & google plus
  13. Explain why washers are used? You can answer this question. You can like the best answer. You can share the question You can get updates of new questions on Facebook linkedin twitter & google plus
  14. What is the difference between lapping and honing You can answer this question. You can like the best answer. You can share the question You can get updates of new questions on Facebook linkedin twitter & google plus
  15. gearbox

    From the album Gears

  16. Plasma Arc Welding

    From the album Engineering images 10

    In plasma-arc welding (PAW), developed in the 1960s, a concentrated plasma arc is created and directed towards the weld area. The produced arc is stable and reaches temperatures around 33,000°C. Plasma is an ionized hot gas composed of nearly equal numbers of electrons and ions. The plasma is started between the tungsten electrode and the orifice by a low-current pilot arc. What creates plasma-arc welding unlike other processes is that the plasma arc is concentrated because it is forced through a relatively small orifice Plasma Arc Welding Torch Operating currents generally are below 100 A, but they can be superior for special applications. While a filler metal is used, it is fed into the arc, as is made in GTAW. Arc and weld-zone shielding is supplied by means of an outer-shielding ring and the use of gases like the following argon, helium, or mixtures.
  17. Overhead Cam Engine & Pushrod

    From the album Engineering images 10

    Overhead valve, also commonly called pushrod, engines are a simplified V-style design. These are built to be compact and resistant to oil contamination and are often used in small displacement racing.In consumer automotive, however, the pushrod engine has largely been replaced by the SOHC and DOHC designs....
  18. If you are a mechanical engineering professional and have a twitter account .. we invite you in our mechanical engineering campaign to collaborate on twitter.. Retweet the following status on https://twitter.com/mechportal/status/646544243649961985 Look forward for your presence. Regards Mechanical Engineeirng forum
  19. Why diesel Engine don't have spark plug? 1. You can answer this question. 2. You can like the best answer. 3. You can share the question
  20. Gears

    All about gears
  21. constant mesh gearbox.jpg

    From the album Gears

    Construction: It is made up of following components: 1. Counter shaft or Lay Shaft: This shaft is in direct contact with the clutch and the main shaft. Keeping in mind according to the gear ratio, the speed of the counter shaft may be less that the speed of the engine. The gear ratio can be defined as the ratio of the teeth of driven gear to the teeth of the driver gear. 2. Main shaft: This shaft operates the speed of the vehicle. The power is made available to the main shaft through the gears from the counter shaft. This is done in accordance with the gear ratio. 3. Dog clutch: Dog clutch is special feature of constant mesh gearbox. It is used for the coupling of any two shafts. This is done by interference. Using a dog clutch, various gears can be locked to the output and input shafts. 4. Gears: The main work of the gears is the transmission of power between the shafts. If the gear ratio is more than one, the main shaft will work at a speed that is slower than the counter shaft, and vice versa. The arrangement of both reverse, as well as forward gears, is present.