Ball bearing type screws are found in following application_____________________?

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. Cap screws are___________________?

   A. similar to’small size tap bolts except that a greater variety of shapes of heads are available
   B. slotted for a screw driver and generally used with a nut
   C. used to prevent relative motion be-tween parts
   D. provided with detachable caps
   E. similar to stud

3. Set screws are_________________?

   A. similar to small size tap bolts except that a greater variety of shapes of heads are available
   B. slotted for a screw driver and generally used with a nut
   C. used to prevent relative motion be-tween parts
   D. similar to stud
   E. none of the above

4. Machine screws are________________?

   A. similar to small size tap bolts except that a greater variety of shapes of heads are available
   B. slotted for a screw driver and generally used with a nut
   C. used to prevent relative motion be-tween two parts
   D. similar to stud
   E. none of the above

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. 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

7. 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

8. Rankine’s theory of failure is applicable for following type of materials___________________?

   A. brittle
   B. ductile
   C. elastic
   D. plastic
   E. tough

9. For applications involving high stresses in one direction only the following type of thread would be best suited______________________?

   A. ISO metric thread
   B. acme thread
   C. square thread
   D. buttress thread
   E. British Association thread

10. When a nut is tightened by plaping a washer below it, the bolt will be subjected to following type of loads___________________?

    A. compression
    B. tension
    C. shear
    D. combined loads
    E. all of the above