If d is the diameter of bolt hole then for a flanged pipe joint to be leak proof, the circumferential pitch of the bolts should be_________________?

Related Mcqs:

1. 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

2. The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be_________________?

   A. same in both cases
   B. 2 times more
   C. 3 times more
   D. 4 times more
   E. unpredictable

3. 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

4. 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

5. 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

6. Eye bolts are used for_________________?

   A. foundation purposes
   B. locking devices *
   C. absorbing shock and vibrations
   D. transmission of power
   E. lifting and transportation of machines and cubicles

7. The shear plane in case of bolts should_________________?

   A. be across threaded portion of shank
   B. be parallel to axis of bolt
   C. be normal to threaded portion of shank
   D. never be across the threaded portion
   E. none of the above

8. Allen bolts are___________________?

   A. self locking bolts
   B. designed for shock load
   C. used in aircraft application
   D. provided with hexagonal depression in head
   E. uniform strength bolts

9. The connecting rod bolts are tightened up so that tightening stress _________________?

   A. is just sufficient to hold parts together
   B. approaches yield point
   C. is 50% of yield point
   D. is about yield point divided by safety factor
   E. none 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