Thermal efficiency of Carnot cycle depends on _____ temperature only.

27) For welding plates of <5mm thickness, the edge require _____ beveling.

28) A 20 tooth pinion meshes with a 63 tooth gear. The gear ratio is

29) Thermal efficiency of a 2-stroke engine is _____ with respect to a 4-stroke engine.

30) In Electro-chemical Machining, material removal is due to