In a riveted joint, when the number of rivets decreases from the inner most row to outer most row, the joint is said to be

A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zigzag riveting is proposed. Which of the following statement is correct?

A

There are four rivets per pitch length, all in double shear

B

There are four rivets per pitch length, out of which two are in single shear and two are in double shear

C

There are five rivets per pitch length, all in double shear

D

There are five rivets per pitch length, out of which four are in double shear and one is in single shear

In a lap joint, if the plates are connected to each other when the joint is made with only one row of rivets then it is called double-riveted lap joint.

A

True

B

False

If the rivets in adjacent rows are staggered and the outermost row has only one rivets, the arrangement of the rivets is called

A

Chain riveting

B

Zigzag riveting

C

Diamond riveting

D

Crisscross riveting

According to I.B.R., the distance between the rows of rivets, for equal number of rivets in more than one row for lap joint or butt joint (chain riveting) shall not be less than

A

d

B

1.5 d

C

2 d

D

2.5 d

In a riveted joint, when the rivets in the various rows are opposite to each other, the joint is said to be

A

Chain riveted

B

Zig-zag riveted

C

Diamond riveted

D

None of these

If number of rivets subjected to single shear per pitch length is 2 and those subjected to double shear per pitch length are 3, then find the shear resistance of rivets is diameter of rivets is 20mm and permissible shear 60N/mm².

A

None of the listed

B

146.1kN

C

150.7kN

D

140.2kN

A joint is said to be double-riveted, triple riveted etc. accordingly to the number of sheets used.

A

True

B

False

A high pressure cylinder consists of a steel tube with inner and outer diameters 30 and 60mm respectively. It is jacketed by an outer steel tube, having an outer diameter of 90mm. Maximum principal stress induced is 80N/mm². Calculate the radial stress due to shrink shift in inner tube. b) -3.04 c) -3.04 d) +3.04

A

+3.04

B

1-(15/r) ²

C

1-(15/r) ²

D

1-(15/r) ²

A high pressure cylinder consists of a steel tube with inner and outer diameters 30 and 60mm respectively. It is jacketed by an outer steel tube, having an outer diameter of 90mm. Maximum principal stress induced is 80N/mm². Calculate the tangential stress due to shrink shift in inner tube. b) -3.04 c) -3.04 d) +3.04

A

+3.04

B

1+ (15/r) ²

C

1+ (15/r) ²

D

1+ (15/r) ²

Two plates are joined by double strap butt joints with rivets arrangement as shown in the figure. Width of the plate is 300mm and diameter of rivets 30mm. The thickness of the plates can be taken as 20mm. Allowable stress in tension, shear and compression are 80 N/mm²,60 N/mm² and 160N/mm². Calculate the tensile strength of rivets along B-B.

A

84.8kN

B

468.8kN

C

384kN

D

None of the listed

In a riveted joint, when the number of rivets decreases from the inner most row to outer most row, the joint is said to be

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