deependra singh parihar


{ City } surat
< Country > india
* Profession * mech. engineer
User No # 27116
Total Questions Posted # 4
Total Answers Posted # 3

Total Answers Posted for My Questions # 33
Total Views for My Questions # 89365

Users Marked my Answers as Correct # 97
Users Marked my Answers as Wrong # 12
Questions / { deependra singh parihar }
Questions Answers Category Views Company eMail

What does a pump develops? Flow or Pressure. Give the Answer with Proper Logic.

Essar,

22 Mechanical Engineering 33466

The 4/5th part of volume of a piece of wood is swiming as well as sunk in a fluid. if the relative dencity of wood is 0.8 then what will be the dencity of fluid in KG/M3. PLEASE ANSWER WITH SOLUTION.

Essar,

2 Mechanical Engineering 3789

A Wheel accelerates from rest with an acceleration of 6 rad/sec seq. How many revolutions are experienced in 4 sec.? give answer with solution.

Essar,

4 Mechanical Engineering 10723

What is cutt off ratio in IC Engines.give proper defination.

Essar, Hyundai, Jindal Steel and Power, L&T,

5 Mechanical Engineering 41387



Answers / { deependra singh parihar }

Question { 14056 }

Why do we use diesal engine for heavy machinery and not petrol?


Answer

We use diesel engine for heavy purpose because it has the
compression ratio (11:1-13:1)more than patrol engine (9:1-
11:1).so the thermal efficience of diesel engine will be
higher compared with petrol engine,

Is This Answer Correct ?    9 Yes 3 No

Question { 20914 }

why valves not used in two stroke engines?


Answer

Because in these engines the working cycle is completed in
1 cycle of crank shaft. so the time of cooling for the
engine is less compared to 4 strke Engines. During at the
end of compression stroke the Tempreture inside the bore
goes to 1500 - 1700 degree c. at this high temprature the
working of valves gets disturb & valves get damage because
valves are made of iron alloys.to elamanate this ports are
used.

Is This Answer Correct ?    42 Yes 5 No


Question { Reliance, 15469 }

how gearbox ratio was calculated?


Answer

The Speed Ratio for any given gear box is Calculated by
following relation

T1/T2 =N2/N1

so Speed of Driven or Follower gear will be

N2 = (T1/T2)*N1

Is This Answer Correct ?    46 Yes 4 No