Question

Which of the following seal assembly has not been used in stirrer glands and bearings?

(a) Stuffing box

(b) Bush seal

(c) Electric drive

(d) Mechanical seal

I have been asked this question by my school principal while I was bunking the class.

Asked question is from Fermenter Design topic in division Design of Fermenter of Fermentation Technology

Answer 1

The correct choice is (c) Electric drive

Explanation: The four basic types of seal assembly used in stirrer glands and bearings are the stuffing box or packed-gland seal, the simple bush seal, the mechanical seal, and the magnetic drive. The stirrer shaft can enter from the top, bottom, side of the fermenter vessel.