Answer / krishnamurthy

Keep the boiler furnace always in negative draft (atleast -
5 mmwC)

Answer / s.khan

boiler can be prevent of back pressure by a good draft
system,i.e balance draft.due to induced draft there is a
negative pressure in furnace but it is not good for
efficient boiler,because of in this way hot gases goes out
tgrough stack very fast without giving complete heat to water.

Can anybody please provide any link to calculate force rquired to bend a metal sheet into pipe? or describe how is it calculated?

2 Answers  

---

Instead of having individual transmission what is the benefit of unified transmission?

2 Answers   Tehama,

---

how to calculate bearing number?

4 Answers   NRB Bearings, NTN, SKF,

---

what r kinds of energies? or types of energies

2 Answers  

---

How to calculate tonnage for embossing or serration washer?

1 Answers   IIS,

---

What is the use of a PULLEY?

12 Answers   Essar, L&T, Valeo Lighting Systems India Private Limited, Wipro,

---

Which has the greater pressure in a stern tube sealing seawater or L.O.

0 Answers   RRB,

---

What is the difference between s.s to en8

2 Answers  

---

what is the size of A4 size paper?

7 Answers   Bhel,

---

How will you classify sliding contact?

0 Answers  

---

if u have three steam turbine blades, how will u find which blade is for low pressure, high pressure and medium pressure?????

5 Answers   Bhel, Sail,

---

What is white metal

1 Answers   Hyundai, RRB,

---