Question 53 - 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  

---

Explain what are the disadvantages of using gear pumps?

0 Answers  

---

Experiment constitutes 1000 ml of 10 ppm dye solution and 0.2 g catalyst mixed in beaker. How to calculate the initial of concentration?

1 Answers  

---

what is the role of id fan in a furnace?

3 Answers   Essar, JSW,

---

What parameters should be considered while selecting type of filter?

4 Answers   Nocil,

---

which is more effective , a single extraction with a large volume of solvent or several small volume extractions? Explain.

2 Answers  

---

types and working of compressor

1 Answers   IOCL,

---

Hi.. Me going to tke test for management trainee(technical) Post I am an chemical engineering student . Can u guide how to prepare for this test.Can u send me test paper pattern..?

0 Answers  

---

What is the wet bulb globe temperature (wbgt)?

0 Answers  

---

Please tell me what type of questions will be asked in a petrochemical company

2 Answers  

---

white rust formation over zinc plated and yellow passivated fasteners during CED painting. WHY?

0 Answers   Wheels India,

---

Question 62 – The names of the flow streams could be represented by : H1 for first hot stream, H2 for second hot stream, C1 for first cold stream, C2 for second cold stream. Data of supply temperature Ts in degree Celsius : 150 for H1, 170 for H2, 30 for C1, 30 for C2. Data of target temperature Tt in degree Celsius : 50 for H1, 169 for H2, 150 for C1, 40 for C2. Data of heat capacity Cp in kW / degree Celsius : 3 for H1, 360 for H2, 3 for C1, 30 for C2. (a) Find the enthalpy changes, dH for all streams of flow H1, H2, C1 and C2 in the unit of kW. Take note of the formula dH = (Cp) (Tt - Ts). (b) Match the hot streams H1 and H2 with the suitable cold streams C1 and C2 to achieve the maximum energy efficiency.

1 Answers  

---