pitch circle

base circle

pitch curve

prime circle

Right

Wrong

(a) primary forces and couples must be balanced

(b) secondary forces and couples must be balanced

both (a) and (b)

none of these

P = W tan(? - ?)

P = W tan(? + ?)

P = W tan(? - ?)

P = W cos(? + ?)

sliding pair

rolling pair

lower pair

higher pair