A grinding wheel is said to be glazed if

Q. A grinding machine whose wheel has a radius of $1/\pi$ is rotating at $2.5rev/sec$ A tool to be sharpened is held against the wheel with a force of $40N$. If the coefficient of friction between the tool and wheel is $0.2$, power required is:

Q. Abrasive material used in grinding wheel selected for grinding ferrous alloys is

Q. A specimen is being grinded on a surface grinder with grinding wheel speed of 1600 m/min, and workpiece speed of 25 mm/min, grinding wheel diameter of 200 mm, grinding depth of cut of 0.025 mm. Take transverse feed of workpiece = 4.4 mm/pass and specific cutting energy = $2200J/m{m}^3$. Assume that pitch of grits at periphery of grinding wheel is 12 mm, the factor for negative rake angle of abrasive grains as 5. Mean grinding power in above operation will be___kW

Q. A grinding wheel $A27K7V$ is specified for finished grinding of a $HSS$ cutting tool. What do you understand about the wheel from the abvoe code. Is this an appropriate choice?

Q. Match the following

	Group I		Group II
P.	Dressing	1.	Blunting of grinding wheels
Q.	Loading	2.	Shaping of grinding wheels
R.	Glazing	3.	Sharpening of grinding wheels
S.	Trueing	4.	Clogging of grinding wheels