Diffrence between centrifugal & recipocating pump?

8 Answers   Essar, IOCL,

---

What is a common source of error in determining the percent spent caustic in refinery applications?

0 Answers  

---

from which book shud i will prepare for the hpcl and various company exma i m fresher and my basic is not strong could u suggest from where to start

7 Answers   IOCL,

---

Explain can large temperature differences in vaporizers cause operational problems?

0 Answers  

---

hi all i have doe cheical engg, but i have to go for iob po interview so can anybody suggest me abt the kind of qns that can be asked.

0 Answers   Indian Overseas Bank,

---

---

What is a "saltation velocity"?

0 Answers  

---

What is the best way to handle bend or turns in slurry piping systems?

0 Answers  

---

How can you estimate the efficiency of a pump?

0 Answers  

---

What particle sizes are electrostatic precipitators used to remove?

0 Answers  

---

ENGINEERING ECONOMY - EXAMPLE 7.2 : In the purchase of a machine with a period n = 8.5 years, the minimum attractive rate of return, i = 12 %, the cost P = $55000, F = $4000 is the salvage, annual maintenance A = $3500. The return of the investment or equivalent uniform annual benefit is $15000. The equivalent uniform annual cost is P (A / P, i, n) + A - F (A / F, i, n). The investment is considered acceptable only when equivalent uniform annual benefit is greater than the equivalent uniform annual cost. From the compound interest table, (A / P, i = 12 %, n = 8 years) = 0.2013, (A / P, i = 12 %, n = 9 years) = 0.1877, (A / F, i = 12 %, n = 8 years) = 0.0813, (A / F, i = 12 %, n = 9 years) = 0.0677. Prove by calculations whether the investment above is acceptable.

1 Answers  

---

Question 45 - According to Raoult’s law for ideal liquid, x (PSAT) = yP where x is mole fraction of component in liquid, y is mole fraction of component in vapor, P is overall pressure and PSAT is saturation pressure. A liquid with 60 mole % component 1 and 40 mole % component 2 is flashed to 1210 kPa. The saturation pressure for component 1 is ln (PSAT) = 15 - 3010 / (T + 250) and for component 2 is ln (PSAT) = 14 - 2700 / (T + 205) where PSAT is in kPa and T is in degree Celsius. By assuming the liquid is ideal, calculate (a) the fraction of the effluent that is liquid; (b) the compositions of the liquid and vapor phases. The outlet T is 150 degree Celsius.

1 Answers  

---

What information is needed to specify a mixer?

0 Answers  

---