25 In differential aeration corrosion, rich oxygenated parts are
(a) anodic(b)cathodic
(c) protected (d) none of above
26
To eliminate entrapment of moisture, it is advised to
(a) make corners smooth
(b) coat the containers
(c) use corrosion resistant alloy, like cupro-nickel (d) provide a drainage hole
27 Storage containers should be designed in such a way that
(a) No crevices are formed
(b) No obstacle to drainage occurs
(c) The design should ensure that the containers are drained in minimum time
(d) the containers should be constructed from plastics rather than metals or allows
28 The corrosion resistance of metals, such as stainless steels and copper alloys.
depends upon the buildup of uniform surface films. Which one of the following
would require a maximum attention of the designer?
(a) Accessibility of oxygen in the operating medium.
(b) Coating of the metal
(c)The drainage capability of the vessel (d)
The period of storage of the liquid in the container​