Oil in journal bearing should be applied at the point where load is________________?

Related Mcqs:

1. 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. ZN/p
   B. p/ZN
   C. Z/pN
   D. N/Zp
   E. Zp/N

2. If a load W is applied instantaneously on a bar; then the stress induced in bar will___________________?

   A. be independent of ratio of mass of load W to mass of bar (y)
   B. increase with increase in y
   C. decrease with decrease in y
   D. depend on other considerations
   E. none of the above

3. The deflection of a cantilever beam under load W is 8. If its width is halved, then the deflection under load W will be________________?

   A. 28
   B. 8/2
   C. 48
   D. 8/4
   E. none of the above

4. Ball bearing type screws are found in following application_____________________?

   A. screw jack
   B. aeroplane engines
   C. crane
   D. steering mechanism
   E. bench vice

5. The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is___________________?

   A. 0.01 micron
   B. 0.1 micron
   C. 1 micron
   D. 10 microns
   E. 25 microns

6. The rated life of a bearing varies___________________?

   A. directly as load
   B. inversely as square of load
   C. inversely as cube of load
   D. inversely as fourth power of load
   E. none of the above

7. The function of cutting oil when threading a pipe is to___________________?

   A. provide cooling action
   B. lubricate the dies
   C. help remove chips
   D. all of the above
   E. none of the above

8. Other method of reducing shock load in the above case can be_________________?

   A. to decrease length
   B. to increase length
   C. unaffected by length
   D. other factors would decide same
   E. none of the above

9. Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to________________?

   A. dynamic loading
   B. static loading
   C. combined static and dynamic loading
   D. completely reversed loading
   E. all of the above

10. The connecting rod bolts are tightened up with initial tension greater than the external load so that___________________?

    A. joint may not open up
    B. bolts are weakest elements
    C. the resultant load on the bolt would not be affected by the external cyclic load
    D. bolts will not loosen during service
    E. none of the above