The rated life of a bearing varies___________________? - PakMcqs

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. Ball bearing type screws are found in following application_____________________?

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

3. 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...

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

   A. nil or lightest B. maximum C. average D. any one of the above E. unpredictable...

5. The fatigue life of a part can be improved by_____________________?

   A. electroplating B. polishing C. coating D. shot peening E. heat treating...

6. The endurance limit of a material with finished surface in comparison to rough surface is_________________?

   A. more B. less C. same D. more or less depending on quantum of load E. unpredictable...

7. Which is correct statement ?

   A. a member made of steel will generally be more rigid than a member of equal load-carrying ability made of cast iron B. a member made of cast iron will generally be. more rigid than a member of equal load carrying ability made of steel C. both will be equally rigid D. which one is...

8. If d is the normal diameter of a bolt in mm, then the initial tension in kg in a bolt used for making a fluid tight joint as for steam engine cover joint is calculated by the relation_______________?

   A. 102 d B. 124 d C. 138 d D. 151 d E. 168 d...

9. When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at_______________?

   A. shank B. head C. in the middle D. at the thread E. anywhere in the bolt...

10. If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to___________________?

    A. 0.2 B. 0.25 C. 0.50 D. 0.6 E. 0.75...