Abod test is to be run on a sample of wastewater that has a five-day bod of 230 mg/l. if the initial do of a mix of distilled water and wastewater is 8.0 mg/l, and the test requires a decrease in do of at least 2.0 mg/l with at least 2.0 mg/l of do remaining at the end of the five days, what range of dilution factors (p) would produce acceptable results? in 300 ml bottles, what range of wastewater volumes could be used?

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

Machinery that is a key part of the process and without which the plant or process cannot function is classifed as: (clo4) a)-critical machinery b)-essential machinery c)-general purpose machinery d)-none of the specified options.