Answer / harsh

Because petrol engine can give high speed but with small load carrying capacity when other side diesel engine gives lesser speed as compare to petrol engine but with very high load carrying capacity. Thats why it is use in trucks.

Answer / chikoo

Compression ration in Diesel engine is hingh than that of Petrol Engine.

Answer / jerry

diesel engines are preferred in heavy duty trucks because the ignition process is dependent on coalition of molecules and this is attainable with a higher compression ration where as petrol engines depends on the volatility and flash point of petrol 

Answer / ansari

Compression efficiency of diesel engine is more than petrol engine b/c in diesel engine air is compressed first then fuel is injected and air can be compressed without combustion where as in case of petrol engine air fuel mix is compressed together and hence higher compression is not possible. Diesel engine run on 4 stroke and petrol on 2 stroke. Diesel engine are heavier as more heat is produced and normally water cooled. Petrol engine are normally air cooled. and a lot more to discuss.

Answer / ankushkalia

In case of heavy vehicles, more torque is require. More torque comes from larger stroke and large stroke means high compression ratio. Diesel engines have high compression ratio. For same temperature and pressure, diesel engines are more efficient.

Answer / latchu

Petrol engine can install less spaces
But diesel engine required large space....

what is mean by boiling mechanism ?

0 Answers  

Distinguish between the shear center and elastic center.

0 Answers  

25 questions in 25 minutes were asked by L&T corein mechanical engg test on 28 nov 2011 are as follows:- L&t mechanical consists of 1> airfuel ratio 2> mollier chart for flow rate 3>homogeneous or hetreogeneous mixture 4>sublimation curve 5>effect on room temperature when fridge is opened 6>cop of refrigerator 7> punching and piercing uses shear or not 8>method not used for tapering 9>forming method not used for productn 10>numerical regardng no.of cuts 11>flow of chip is controlled by which parameters 12> property important for impact loading 13>stifness of spring when it is cut into 2 pieces 14> device reqd for energy fluctuation 15> property on which rivet is selected 16>crowning to prevent flat belt pulley errors like undercut 17>cavitation occurs at which stage 18>qstn regardng inventory control 19>for ship vessel industry what sort of plantlayout reqd 20>value engg definition 21> qstn on how the extnsn occurs for uniform loading 22> qstn regardng stress actng on the shaft23>maximum value of mohr's circle diameter 24>qstn regardng meshing of teeth 25>qstn on helical gear reqrd better read G.K.PUBLISHERS GATE PAPERS ESPECIALLY FROM 1993 to 2003 ESPECIALLY THEORY QUESTIONS RATHER THAN NUMERICAL QUESTIONS

0 Answers   L&T,

what is ton(refrigeration)?

2 Answers  

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0 Answers  

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0 Answers   IFFCO,

why rotory compressor is used in the gas turbine?

2 Answers  

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5 Answers  

• How will you be evaluated at Petro Star Mount, and how often?

1 Answers  

how to calculate volume of torispherical head in design of pressure vessel???????

3 Answers  

whats the coloring code of a air to open or a air to close valve?

0 Answers  

Which Property Shows Resistance to flow?

2 Answers   Bhel,