How does Ezekiel Mphahlele use imagery in Mrs. Plum?

Examples of Imagery:

'That day I was as angry as a red-hot iron when it meets water' (pg. 164)

"our food ... is so nice that it does not stop in the mouth or the throat to greet anyone before it passes smoothly down' (pg. 171)

'We walked in with slow footsteps that seemed to be sniffing at the floor' (187).