8) The most commonly used antifreeze material in cooling system is

9) The time required for one complete cut on a piece of work 350 mm long and 50 mm in diameter with cutting speed 35 m/min and the feed 0.5 mm/rev is

10) A steel shaft of 25 mm diameter is rotated at speed 637 r.p.m. Find the cutting speed in m/min.

11) The type of maintenance in which the repairs made after the equipment is out of order and it cannot perform its normal function any larger is called

12) Which of the following welding methods uses a pool of molten metal?