Question

The number of ports in the lid of stirred vessel are _____________

(a) One

(b) Three

(c) Five

(d) Seven

I got this question at a job interview.

This interesting question is from Laboratory Fermentation System topic in section Fermentation System & Management of Fermentation Technology

Answer 1

Right option is (c) Five

To explain I would say: The number of ports in the lid of the stirred fermenter vessel is five. They are of Quickfit type and are used to attach probes or sensors like pH sensor, temperature sensor, antifoam sensor, dissolved oxygen measurement, pressure measurement, etc.