Related Questions

In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing
A Remains constant at all speeds
B Is minimum at zero speed and increases monotonically with increase in speed
C Is maximum at zero speed and decreases monotonically with increase in speed
D Becomes minimum at an optimum speed and then increases with further increase in speed
A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing.
A Partially
B Fully
C Either A or B
D None of these
If p = bearing pressure on projected bearing area, Z = absolute viscosity of lubricant and N = speed of journal, then the bearing characteristic number is given by
A $$\frac{{{\text{ZN}}}}{{\text{p}}}$$
B $$\frac{{\text{p}}}{{{\text{ZN}}}}$$
C $$\frac{{\text{Z}}}{{{\text{pN}}}}$$
D $$\frac{{\text{N}}}{{{\text{Zp}}}}$$
In a journal bearing, the load on the bearing is __________ to the axis of the journal.
A Parallel
B Perpendicular
C Both A and B
D None of these
In a partial journal bearing, the angle of contact of the bearing with the journal is
A 120°
B 180°
C 270°
D 360°
In a full journal bearing, the angle of contact of the bearing with the journal is
A 120°
B 180°
C 270°
D 360°
When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a
A Short bearing
B Long bearing
C Medium bearing
D Square bearing
A sliding bearing which can support steady loads without any relative motion between the journal and the bearing, is called
A Hydrostatic lubricated bearing
B Hydrodynamic lubricated bearing
C Boundary lubricated bearing
D Zero film bearing
In a hydrodynamic lubricated bearing
A There is a thick film of lubricant between the journal and the bearing
B There is a thin film of lubricant between the journal and the bearing
C The lubricant is forced between the journal and the bearing, by external pressure
D There is no lubricant between the journal and the bearing
Which of the following is a type of cash receipt journal + cash payment journal?
A Bank statement
B Statement of cash flow
C Cash book
D Cash documents

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