The resultant axial load on a bolt depends upon

The resultant axial load on a bolt depends on

A

Initial tension

B

External load applied

C

Relative elastic yielding (springness) of the bolt and the connected member

D

All of the above

When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the

A

Initial tension

B

External load applied

C

Sum of the initial tension and external load applied

D

Initial tension or external load, whichever is greater

When the bolt is very yielding as compared to the connected members, then the resultant load on the bolt will be equal to the

A

Initial tension

B

External load applied

C

Sum of the initial tension and external load applied

D

Initial tension or external load, whichever is greater

A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is $$\tau $$. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

A

$$\frac{\tau }{2}$$

B

$$\tau $$

C

$$2\tau $$

D

$$4\tau $$

When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor and W = Axial compressive load on the spring)

A

$$\frac{{{\text{WD}}}}{{\pi {{\text{d}}^3}}} \times {\text{K}}$$

B

$$\frac{{2{\text{WD}}}}{{\pi {{\text{d}}^3}}} \times {\text{K}}$$

C

$$\frac{{4{\text{WD}}}}{{\pi {{\text{d}}^3}}} \times {\text{K}}$$

D

$$\frac{{8{\text{WD}}}}{{\pi {{\text{d}}^3}}} \times {\text{K}}$$

When a bolt is subjected to an external load, the stress induced in the bolt will be

A

Tensile stress

B

Shear stress

C

Combined tensile and shear stress

D

Any one of these

When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which (where, Fa is the load shared by each rivet due to axial load and Fm is the shearing load due to moment in any rivet.)

A

Is at the maximum distance from CG of the rivet group

B

Is at the minimum distance from CG of the rivet group

C

Gives the maximum angle between the two forces Fa and Fm

D

Gives the minimum angle between the two forces Fa and Fm

When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)

A

0.5 d

B

0.75 d

C

d

D

1.25 d

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

124 d

B

138 d

C

151 d

D

168 d

The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover joints, is calculated by the relation (where d = Nominal diameter of bolt in mm)

A

1420 d

B

1680 d

C

2080 d

D

2840 d

The resultant axial load on a bolt depends upon

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