Theory of Machine
The Grubler's criterion for determining the degrees of freedom (n) of a mechanism having plane motion is (where l = Number of links, and j = Number of binary joints)

n = (l -1) - j
n = 4(l - 1) - 3j
n = 3(l - 1) - 2j
n = 2(l - 1) - 2j

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
In a hydrodynamic journal bearing, there is

A very thin film of lubricant between the journal and the bearing such that there is contact between the journal and the bearing
A thick film of lubricant between the journal and the bearing
A forced lubricant between the journal and the bearing
No lubricant between the journal and the bearing

ANSWER DOWNLOAD EXAMIANS APP