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1. An airflow of 25 m3/s and radon daughter concentrations of 0.2 WL passes a seal from which issues a leakage flow of 0.4 m3/s at 150 WL. Determine the radon daughter concentration in the downstream airflow.
2. Describe the various methods of methane drainage available to drain gas for longwall mining operations.
3. In the case of cross measures methane drainage of longwall operations what factors influence the spacing of drainage boreholes?
4. On retreating longwall coalfaces active ventilation of the goaf is undertaken, why is this. Detail three methods of ventilating the goaf in such conditions.
5. Briefly describe the methods used to control radiation in uranium mines.
good understanding of Mil-Std-499 and Mil-Std-499A
CEE 357 Winter 2014. Independent writing assignment. Choose any current environmental issue on which a civil/environmental engineer might reasonably work.
Assessment will be carried out by oral examination during the lab sessions (nothing needs to be handed in). When you have completed the exercises you should ask a tutor to examine your solution. The tutor will then ask you some questions to test yo..
The project will consist of a written paper and a presentation - Egress and Life Safety Analysis - FIRE 4500 (FIRE 2225)
The L-beam illustrated in Figure is to carry, in addition to its own weight, a dead load g = 25 kN/m and a live load q = 100 kN/m over a simply-supported span of 8 m. Design and detail the tension reinforcement.
Calculate the d-spacing for the wet smectite. What happened to the smectite crystal structure, when it was exposed to water?
Design and modelling of adsorption chromatography based on isotherm data
What is the tempering treatment typically applied to martensitic steels. (iv) Briefly, discuss by defining, comparing and contrasting gray and white cast irons.
What other information would be required to be able to write a more complete Product Design Specification and derive at least four concept designs to satisfy the given specification. Use short written descriptions and simple sketches to illustra..
creating the pumping and piping system to supply cool water to the condenser
Understand common configurations for controlled and uncontrolled rectification and understand common configurations for controlled and uncontrolled rectification
what is the pressure drop in each of the airways and the total pressure drop in the series combination of airways and what is the pressure drop in each of the airways and the total pressure drop in the series combination of airways?
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