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61.

The backlash between gears is expressed in terms of

A.	Difference between addendum and dedendum	B.	The difference between PCD of two gears
C.	The actual gear width on pitch circle minus the standard gear width for given number of teeth on gear	D.	Clearance between faces of the mating gears
E.	None of the above

62.

In most high speed milling cutters, positive radial rake angle is

63.

The included angle of a lathe centre is generally

64.

For mild steel work piece using carbide tool, the temperature at which maximum materials is removed is

65.

A standard ground drill for use on mild steel has a point angle of

66.

In centreless grinding, work piece is clamped in

67.

In centreless grinding the work piece advances by

A.	Push given by operator	B.	Hydraulic force
C.	Force exerted by grinding wheel	D.	Force exerted by regulating wheel
E.	Remains stationalry

68.

In a 48A 100-H-8-S-BE grinding wheel the type of bond used is

69.

International Prototype Meter is made of

70.

Specific temperature for the international Prototype metre is