String diagram is used

[A]. for checking the relative values of various layouts
[B]. when a group of workers are working at a place
[C]. where processes require the operator to be moved from one work place to another
[D]. all of the above
✅ The correct answer is option D.

The procedure of modifying work content to give more meaning and enjoyment to the job by involving employees in planning, organisation and control of their work, is termed as

[A]. job enlargement
[B]. job enrichment
[C]. job rotation
[D]. job evaluation
✅ The correct answer is option B.