Maintenance activities performed between two overhauling is called as

The system that does not use any belt, chain and gear in its drive

----------- is one of the positive drive type belts and has no slippage.

-------------- is one of the most accurate, strongest and quietest gear used in printing m/c today.

Unit cost of a book can be calculated by

The machine is expected to run for 300 days/year, 8 hours/day at 75% of its capacity. The total hours the machine is utilized in a year will be