Test 26 - Riveted Joints

Question 1 ప్రశ్న 1

Which statement most accurately places riveted structural joints in the present Indian steel-design context?

A Rivets have disappeared completely from IS 800 and have no syllabus relevance B Riveted joints remain a legitimate syllabus and legacy-structure topic, while modern structural construction commonly relies more on bolted and welded connections C All new steel structures are required to use rivets instead of bolts D Rivets are used only in reinforced concrete construction

Question 2 ప్రశ్న 2

Which pairing correctly identifies Indian Standards referenced for structural rivets in IS 800:2007?

A IS 1929 for hot-forged steel rivets for hot closing and IS 2155 for cold-forged solid steel rivets for hot closing B IS 456 for hot-forged rivets and IS 3370 for cold-forged rivets C IS 875 for structural rivets and IS 1893 for rivet holes D IS 808 for rivet material and IS 2062 only for rivet-head dimensions

Question 3 ప్రశ్న 3

What characterizes a conventional riveted lap joint?

A The two main plates meet edge to edge and are joined only by two cover plates B The two plates overlap each other and are connected by rivets passing through the overlapping portion C The plates are connected without any overlap or cover plate D The rivets carry only axial tension and no shear

Question 4 ప్రశ్న 4

Which statement correctly compares the usual shear condition of rivets in single-cover and double-cover butt joints?

A Rivets are normally in double shear in a single-cover butt joint and single shear in a double-cover butt joint B Rivets are normally in single shear in both types C Rivets are normally in single shear in a single-cover butt joint and double shear in a symmetric double-cover butt joint D Rivets carry no shear in a butt joint

Question 5 ప్రశ్న 5

Which statement correctly defines pitch and gauge in a regular riveted joint?

A Pitch is the transverse distance between rivet rows and gauge is the plate thickness B Pitch is the centre-to-centre distance between consecutive rivets in the same row, while gauge is the transverse centre-to-centre distance between adjacent rivet rows C Pitch is the rivet diameter and gauge is the hole diameter D Pitch and gauge both mean the edge distance

Question 6 ప్రశ్న 6

According to the IS 800:2007 fastener terminology, how are edge distance and end distance distinguished?

A Edge distance is measured parallel to the direction of stress and end distance perpendicular to it B Edge distance is measured at right angles to the direction of stress, while end distance is measured in the direction of stress C Both are always measured diagonally D There is no distinction between the two terms

Question 7 ప్రశ్న 7

Under the general fastener-spacing rule of IS 800:2007, what is the minimum centre-to-centre spacing between fasteners of nominal diameter d?

A 1.5d B 2.0d C 2.5d D 4.0d

Question 8 ప్రశ్న 8

Under the legacy IS 800:1984 Working Stress provisions, what permissible shear and bearing stresses were specified for mild-steel power-driven shop rivets?

A 80 MPa in shear and 250 MPa in bearing B 100 MPa in shear and 300 MPa in bearing C 120 MPa in shear and 410 MPa in bearing D 150 MPa in shear and 450 MPa in bearing

Question 9 ప్రశ్న 9

In the legacy IS 800:1984 Working Stress provisions, how were permissible stresses for field rivets related to those for corresponding shop rivets?

A They were increased by 25 percent B They were unchanged C They were reduced by 10 percent D They were reduced by 50 percent

Question 10 ప్రశ్న 10

Under the legacy IS 800:1984 rivet provisions, what hole diameter was used for an 18 mm nominal rivet when the nominal rivet diameter did not exceed 25 mm?

A 18.0 mm B 19.0 mm C 19.5 mm D 20.0 mm

Question 11 ప్రశ్న 11

Using the legacy Working Stress convention, an 18 mm nominal rivet has effective diameter 19.5 mm and permissible shear stress 80 MPa. What is its single-shear strength?

A 11.95 kN B 23.89 kN C 37.70 kN D 47.78 kN

Question 12 ప్రశ్న 12

The same 18 mm nominal rivet with effective diameter 19.5 mm and permissible shear stress 80 MPa is placed in ideal double shear. What shear strength is obtained?

A 23.89 kN B 35.84 kN C 47.78 kN D 71.67 kN

Question 13 ప్రశ్న 13

An 18 mm nominal rivet is taken to have effective diameter 19.5 mm in the legacy calculation. It connects a 10 mm thick governing plate and the permissible bearing stress is 250 MPa. What is the bearing strength of one rivet?

A 24.38 kN B 39.00 kN C 48.75 kN D 97.50 kN

Question 14 ప్రశ్న 14

For the rivet described above, the single-shear strength is 23.89 kN and bearing strength is 48.75 kN. What is the classical rivet value when the rivet is in single shear?

A 23.89 kN B 36.32 kN C 48.75 kN D 72.64 kN

Question 15 ప్రశ్న 15

For the same rivet used in a symmetric double-cover butt joint, its ideal double-shear strength is 47.78 kN and its governing bearing strength is 48.75 kN. What is its classical rivet value?

A 23.89 kN B 47.78 kN C 48.75 kN D 96.53 kN

Question 16 ప్రశ్న 16

For one pitch length of a single-riveted lap joint, which expression gives the classical tearing strength of a plate when p is pitch, d0 is rivet-hole diameter, t is plate thickness and sigma_t is permissible tensile stress?

A p t sigma_t B (p - d0)t sigma_t C d0 t sigma_t D (p + d0)t sigma_t

Question 17 ప్రశ్న 17

A single-riveted lap joint has pitch p = 60 mm, rivet-hole diameter d0 = 19.5 mm, plate thickness t = 10 mm and permissible plate tensile stress 150 MPa. What is the plate tearing strength per pitch length?

A 36.45 kN B 48.75 kN C 60.75 kN D 90.00 kN

Question 18 ప్రశ్న 18

For the single-riveted lap joint in the previous question, take rivet single-shear strength = 23.89 kN, bearing strength = 48.75 kN and plate tearing strength = 60.75 kN. The strength of the corresponding solid plate per pitch is 90.0 kN. What is the joint efficiency?

A 26.5 percent B 40.3 percent C 54.2 percent D 67.5 percent

Question 19 ప్రశ్న 19

A double-riveted chain lap joint has two rivets per pitch length. Take p = 70 mm, d0 = 19.5 mm, t = 10 mm, permissible plate tensile stress = 150 MPa, single-shear strength per rivet = 23.89 kN and bearing strength per rivet = 48.75 kN. Which failure mode governs the strength per pitch?

A Plate tearing at 46.5 kN B Rivet shear at 47.78 kN C Bearing at 97.5 kN D Solid-plate strength at 105 kN

Question 20 ప్రశ్న 20

For the double-riveted chain joint in the previous question, the governing joint strength is 46.5 kN per pitch and the strength of the unpunched solid plate over one 70 mm pitch is 105 kN. What is the joint efficiency?

A 26.5 percent B 44.3 percent C 55.7 percent D 67.8 percent

Question 21 ప్రశ్న 21

A concentric connection must transfer 180 kN using identical rivets having a classical rivet value of 23.89 kN each. Ignoring plate tearing and other group effects, what minimum number of rivets is required?

A 6 B 7 C 8 D 9

Question 22 ప్రశ్న 22

For a classical riveted tension joint, which principle correctly determines the strength of the joint?

A The largest of rivet shear, rivet bearing and plate tearing strengths governs B Only rivet shear is relevant C The least strength among the relevant plate-tearing, rivet-shear and rivet-bearing failure modes governs D The arithmetic average of all possible failure strengths governs

Question 23 ప్రశ్న 23

In a staggered or zigzag riveted tension joint, why can the net-section check be more involved than simply subtracting all hole diameters from one straight transverse section?

A A diagonal zigzag rupture path can pass between staggered holes and may have to be checked in addition to straight paths B Staggered rivets eliminate plate tearing completely C Only the gross plate area is used when rivets are staggered D The rivet heads replace all material removed by the holes

Question 24 ప్రశ్న 24

For an eccentrically loaded rivet group subjected to an in-plane force P acting at eccentricity e from the group centroid, which statement describes the usual elementary elastic analysis?

A Each rivet carries only P/n and eccentricity is ignored B Each rivet receives a direct shear P/n plus a secondary shear due to moment Pe, with the secondary shear proportional to its distance from the rivet-group centroid C Only the rivet nearest the load carries the entire force D The secondary shear is inversely proportional to the square of the rivet diameter only

Question 25 ప్రశ్న 25

Four identical rivets are located at coordinates (±50 mm, ±50 mm) about their group centroid. A vertical downward load of 40 kN acts 100 mm to the right of the centroid, producing a clockwise moment. Using direct shear P/n and secondary shear Vmi = Mri/Σr², what is the maximum resultant force in any rivet?

A 10.0 kN B 14.14 kN C 20.0 kN D 22.36 kN

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