Which of the following sentence is not correct?
1
Pressure angle varies from maximum at the beginning of engagement, reduces to zero at the pitch point and again increases to maximum at the end of engagement in cycloidal profile.
2
Pressure angle is constant in involute profile throughout the engagement.
3
There is phenomena of interference in cycloidal profile.
4
Involute teeth are easy to manufacture and thus are cheaper.
5
All of the above