A collar thrust bearing:
1. can support more load than a Michell thrust bearing
2. can prevent a rotating shaft from moving in both axial directions
3. has boundary lubrication
4. is an anti-friction type bearing
a) 1, 2
b) 2, 3
c) 1, 2, 4
d) 1, 2, 3, 4
e) 3, 4
Answer: b