Physical Chemistry Answers

Determine the gas flow rate (Nm3 /m2 -min) in upper zone of a blast furnace for the given data: permeability = 2.2x10-6 m4 /N-sec, suction (AP) = 1000 mm of water, bed depth (H) = 50 cm. 

In the following MCQ, identify the correct option and justify.

With reference to auxiliary injection in blast furnace, identify the correct statement(s).

a. Steam injection promotes indirect reduction in the blast furnace

b. Oil injection is usually coupled with oxygen enrichment

c. Replacement ratio for PCI is greater than 1

d. Use of high blast temperature results in lower productivity

In the following MCQ, identify the correct option and justify.

Identify the factor that enhances the overall efficacy of PCI:

a. Lower blast temperature

b. Particles should be very fine below 200 mesh

c. Optimum volatile matter

d. Wet coal fines

In the following MCQ, identify the correct option and justify.

Cost of coke contributes to the ________% to the total cost of iron making from blast furnace.

a. 25-30

b. 35-40

c. 45-50

d. 55-60

In the following MCQ, identify the correct option and justify.

The incorrect statement with reference to oxygen enrichment in air blast is:

a. RAFT increases

b. Shorter Isothermal zone

c. Lower exit gas temperature

d. Lower Coke rate

In the following MCQ, identify the correct option and justify.

Identify the factor favoring flooding in the blast furnace.

a. Lower Gas velocity

b. Lower viscosity of the slag

c. Non wetting slag

d. Lower coke size

In the following MCQ, identify the correct option and justify.

Which is not an indication of Channeling in Blast Furnace?

a. Furnace takes air with increase in pressure drop

b. High exit gas temperature

c. High CO/CO2 ratio

d. Higher flue dust emission

An electronic transition occurs between two neighboring energy levels and emits radiation with a wavelength of 432 nm. Determine n for the transition. Assume L = 1.2 nm

How many grams of silver nitrate would you need to dissolve in 500 of water in order to make a 6.0 M solution ? Show your work .

Please spend some time reflecting on what you've learned about alternate energy sources and think about some of the challenges our country is facing in its future.

1. Would you feel safe living within 5 miles of a nuclear power plant? Why or why not?