Noise level heard at a distance of about 100 metres from a jet engine with after burner is about ________ decibels?

Which property of refractories is the most important for top section of the blast furnace?

Which of the following is the most common pump for pumping either raw sewage or sludge?

Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function Gp(s) = 1/(4s + 1)(2s + 1)(s + 1)?

Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?

Equilibrium constant of a reaction varies with the________?