Machine Design
The expression 0.175 - 0.841/T is the Lewis form factor for

None of these
14½° composite and full depth involute system
20° stub system
20° full depth involute system

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
The contact ratio is the ratio of

Length of arc of contact to the circular pitch
Length of arc of recess to the circular pitch
Length of path of contact to the circular pitch
Length of arc of approach to the circular pitch

ANSWER DOWNLOAD EXAMIANS APP