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_______________?

Related Mcqs:

1. 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

2. 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_________________?

   A. lOVZ
   B. 10VZtol5Vd
   C. 15Vdto20VZ
   D. 20Vdto30Vd
   E. 30V5″to40Vd

3. 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

4. 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

5. For tight leakage joints, following type of thread is best suited ____________________?

   A. metric
   B. buttress
   C. square
   D. acme
   E. NPT (national pipe threads)

6. The valve rod in a steam engine is connected to an eccentric rod by_________________?

   A. cotter joint
   B. bolted joint
   C. kunckle joint
   D. universal coupling
   E. gib and cotter joint

7. The strap end of a connecting rod of steam engine is joined by_________________?

   A. gib of cotter joint
   B. sleeve and cotter joint
   C. spigot socket cotter joint
   D. knuckle joint
   E. universal coupling

8. The piston rod of a steam engine is usually connected to the cross head by means of__________________?

   A. bolted joint
   B. kunckle joint
   C. cotter joint
   D. universal joint
   E. universal coupling

9. In order to obtain bolt of uniform strength____________________?

   A. increase shank diameter
   B. increase its length
   C. drill an axial hole through head up to threaded portion so that shank area is equal to root area of thread
   D. tighten die bolt properly
   E. all of the above

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