above the line joining the two wheel centers

below the line joining the two wheel centers

on the line joining the two wheel centers

at the intersection of the line joining the wheel centers with the work place plane

regulating wheel diameter

speed of the regulating wheel

angle between the axes of grinding and regulating wheels

all of the above

in feed grinding

through feed grinding

end feed grinding

any one of these

produce tapers

grind shoulders and formed surfaces

grind long, slender shafts or bars

all of these

in feed grinding

through feed grinding

end feed grinding

any one of these