Jam nut is a locking device in which _____________________?

Related Mcqs:

1. Castle nut is a locking device in which__________________?

   A. one smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
   B. a slot is cut partly is middle of nut and then slot reduced by tightening a screw
   C. a hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
   D. through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end
   E. none of the above.

2. Split nut is a locking device in which_________________?

   A. one smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
   B. a slot is cut partly in middle of nut and then slot reduced by tightening screw
   C. a hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
   D. through slots are made at top and a cotter-pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at the other end
   E. none of the above

3. Elastic nut is a locking device in which__________________?

   A. one small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
   B. a slot is cut partly in middle of nut and then slot reduced by tightening a screw
   C. hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip
   D. through slots are made at top and a cotter-pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end
   E. none of the above

4. The pitch of threads on a Jock nut in comparison to pitch of nut is_________________?

   A. same
   B. coarser
   C. finer
   D. very coarse
   E. very fine

5. For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately________________?

   A. 0.4 times
   B. 0.6 times
   C. 0.7 times
   D. 0.8 times
   E. 0.9 times the normal diameter of bolt

6. If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to___________________?

   A. diameter of bolt
   B. 0.75 x diameter of bolt
   C. 1.25 x diameter of bolt
   D. 1.5 x diameter of bolt
   E. 0.5 x diameter of bolt

7. A self locking screw has________________>

   A. fine threads
   B. coarse threads
   C. coefficient of friction > tangent of load angle
   D. hole for inserting split pin
   E. two nuts for locking

8. The following type of nut is used with alien bolt____________________?

   A. alien nut
   B. hexagonal nut
   C. slotted nut
   D. castle nut
   E. any one of the above

9. 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

10. If threads on a bolt are left hand, threads on nut will be_____________________?

    A. right hand with same pitch
    B. left hand with same pitch
    C. could be left or right hand
    D. right hand with fine pitch
    E. left hand with fine pitch