In a hydrodynamic lubricated bearing

there is a thick film of lubricant between the journal and the bearing
there is a thin film of lubricant between the journal and the bearing
there is no lubricant between the journal and the bearing
the lubricant is forced between the journal and the bearing, by external pressure
✅ The correct answer is option A.

Which of the following statement is wrong ?

The factor of evaporation for all boilers is always greater than unity.
The amount of water evaporated in kg per kg of fuel burnt is called equivalent evaporation from and at 100° C.
The ratio of heat actually used in producing the steam to the heat liberated in the furnace is called boiler efficiency.
none of the above
✅ The correct answer is option D.