Draw a typical DO curve for a BOD run at the following conditions.
a. Stream water, 20°C, dark
b. Unseeded sugar water, 20°C, dark
c. Stream water, 20°, with light
d. Stream water, 40°C, dark

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.

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.