When the pitch is p, rivet hole diameter is d, and the thickness of the plate is t, then what will be the area that resists the tensile force?

A flat plate 30mm wide and “t”mm wide is subjected to a tensile force of 5kN. The plate has a circular hole of diameter 15mm with the centre coinciding with the diagonal intersection point of the rectangle. If stress concentration factor=2.16, find the thickness of the plate if maximum allowable tensile stress is 80N/mm².

A

8mm

B

9mm

C

10mm

D

12mm

In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)

A

1 d

B

1.5 d

C

2.5 d

D

2 d

In order to avoid tearing off the plate at an edge, the distance from the center of the rivet hole to the nearest edge of the plate (i.e. margin) should be (where d = Diameter of rivet hole in mm)

A

d

B

1.5 d

C

2 d

D

2.5 d

Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole and $${\sigma _{\text{t}}}$$ = Permissible tensile stress for plate material)

A

$${\text{pd}}{\sigma _{\text{t}}}$$

B

$${\text{pt}}{\sigma _{\text{t}}}$$

C

$$\left( {{\text{p}} - {\text{d}}} \right){\sigma _{\text{t}}}$$

D

$$\left( {{\text{p}} - {\text{d}}} \right){\text{t}}{\sigma _{\text{t}}}$$

For the plate of thickness t, which is in tension has permissible stress of σt, with pitch p, and rivet hole diameter d, find the tensile strength of the riveted joint.

A

σt(p-d)2t

B

σt(d-t)p

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

Which of the following assumptions are made in the design of rivet joints? A. Rivets are stressed equally B. Stress in plate is maximum at mid-width C. Rivet hole is completely filled by rivet D. Friction between plates is neglected

A

only A

B

A and C only

C

B and D only

D

A, C and D only

For riveted joint, which empirical relation is used for calculating the diameter of rivet? Where, t = Thickness of main plate, d = Rivet diameter in mm

A

$\rm d = 3\sqrt t$

B

$\rm d = 1.9 \sqrt t$

C

$\rm d = 1.2 \sqrt t$

D

$\rm d = 6\sqrt t$

In seive plate column, holes are drilled or punched in sizes ranging from 2.5 to 12 mm (5 mm being widely used). The hole pitch is normally __________ times the hole diameter to give the required hole area.

A

0.5 to 1.5

B

2.5 to 4.0

C

5 to 10

D

10 to 15

In order to avoid tearing of the plate at edge, the distance from the center line of the rivet hole to the nearest edge of the plate in terms of dia. of rivet d should be equal to

A

1 d

B

1.25 d

C

1.5 d

D

1.75 d

When the pitch is p, rivet hole diameter is d, and the thickness of the plate is t, then what will be the area that resists the tensile force?

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