77 + Interview Questions in Bolted Connections in Design Of Steel Structures Page 2 InterviewSolution

51.	Tensile strength of bolt is given by(a) 0.9fubAn/1.1(b) 0.9fybAn/1.1(c) 0.9fubAn/1.25(d) 0.9fybAn/1.25I got this question by my school teacher while I was bunking the class.This interesting question is from Bolted Connections topic in portion Bolted Connections of Design of Steel Structures
Answer» CORRECT choice is (C) 0.9fubAn/1.25 Explanation: Tensile strength of BOLT is GIVEN by 0.9fubAn/1.25, where fub=ultimate tensile STRESS of bolt, An= net tensile area.

Discussion

52.	Shear strength of bolt is given by ____(a) fu(nnAnb+ nsAsb)/(√3 x 1.1)(b) fy(nnAnb+ nsAsb)/(√3 x 1.1)(c) fu(nnAnb+ nsAsb)/(√3 x 1.25)(d) fy(nnAnb+ nsAsb)/(√3 x 1.25)I had been asked this question in an interview.Question is taken from Bolted Connections in division Bolted Connections of Design of Steel Structures
Answer» The CORRECT choice is (c) fu(nnAnb+ nsAsb)/(√3 X 1.25) Explanation: Shear strength of BOLT = fu(nnAnb+ nsAsb)/(√3 x 1.25), where fu=ultimate strength of bolt, nn=number of shear PLANES with thread intercepting shear plane, ns=number of shear planes without thread intercepting shear plane, Anb=nominal PLAIN shank area of bolt, Asb=net shear area of bolt at threads.

Discussion

53.	Spacing of tacking fasteners when exposed to weather should not exceed ______(a) 32t, where t= thickness of outside plate(b) 25t, where t= thickness of outside plate(c) 20t, where t= thickness of outside plate(d) 16t, where t= thickness of outside plateI had been asked this question in an online quiz.This is a very interesting question from Bolted Connections topic in chapter Bolted Connections of Design of Steel Structures
Answer» Correct answer is (d) 16t, where t= thickness of outside PLATE Easiest explanation: SPACING of tacking fasteners in a line should not exceed (i)32T or 300mm, whichever is LESS when not EXPOSED to weather, where t= thickness of outside plate, (ii)16t or 200mm, whichever is less when not exposed to weather, where t= thickness of outside plate.

Discussion

54.	Tacking fasteners are used when _______(a) minimum distance between centre of two adjacent fasteners is exceeded(b) maximum distance between centre of two adjacent fasteners is exceeded(c) maximum distance between centre of two adjacent fasteners isnot exceeded(d) for aesthetic appearanceThe question was asked during an interview.The query is from Bolted Connections topic in section Bolted Connections of Design of Steel Structures
Answer» The CORRECT option is (b) maximum distance between centre of two ADJACENT fasteners is exceeded The best EXPLANATION: Tacking fasteners are USED when maximum distance between centre of two adjacent fasteners is exceeded. These are not SUBJECTED to calculated stress.

Discussion

55.	Maximum edge distance should not exceed ______(a) 10tε, where ε = √(250/fy), t = thickness of thinner outer plate(b) 20tε, where ε = √(250/fy), t = thickness of thinner outer plate(c) 16tε, where ε = √(250/fy), t = thickness of thinner outer plate(d) 12tε, where ε = √(250/fy), t = thickness of thinner outer plateThis question was addressed to me during an interview.Question is from Bolted Connections topic in division Bolted Connections of Design of Steel Structures
Answer» Right option is (d) 12tε, where ε = √(250/fy), t = THICKNESS of thinner outer plate The best EXPLANATION: Maximum EDGE DISTANCE should not exceed 12tε, where ε = √(250/fy), t = thickness of thinner outer plate. If members are exposed to CORROSIVE influence, it shall not exceed (40+4t), where t = thickness of thinner connected plate.

Discussion

56.	Maximum gauge length is _________(a) 100+4t, where t is thickness of thinner plate(b) 100-4t, where t is thickness of thinner plate(c) 4t, where t is thickness of thinner plate(d) 100mmI got this question in homework.I'm obligated to ask this question of Bolted Connections in section Bolted Connections of Design of Steel Structures
Answer» Right answer is (a) 100+4t, where t is thickness of THINNER plate For explanation: Distance between centres of any two consecutive fasteners in line adjacent and parallel to EDGE of outside plate shall not exceed (100+4t) or 200mm, WHICHEVER is less in COMPRESSION and TENSION members.

Discussion

57.	Minimum edge distance and end distance for rolled, machine flame cut is(a) 1.7 x hole diameter(b) 1.2 x hole diameter(c) 1.5 x hole diameter(d) 2.0 x hole diameterI have been asked this question in an international level competition.Question is taken from Bolted Connections topic in portion Bolted Connections of Design of Steel Structures
Answer» Right choice is (c) 1.5 X hole diameter The EXPLANATION: Minimum EDGE distance and end distance from centre of any hole to nearest edge of plate shall not be (i) less than 1.7 x hole diameter, in case of sheared or HAND flame cut edge, (ii) less than 1.5 x hole diameter, in case of ROLLED, machine flame cut.

Discussion

58.	What is the difference between end and edge distance?(a) Edge distance is measured parallel to direction of stress, while end distance is measured perpendicular to direction of stress(b) Edge distance is measured parallel to direction of stress, while end distance is measured parallel to direction of stress(c) Edge distance is measured perpendicular to direction of stress, while end distance is measured perpendicular to direction of stress(d) Edge distance is measured perpendicular to direction of stress, while end distance is measured parallel to direction of stressI have been asked this question at a job interview.I'd like to ask this question from Bolted Connections in division Bolted Connections of Design of Steel Structures
Answer» RIGHT option is (d) Edge distance is measured perpendicular to direction of stress, while end distance is measured parallel to direction of stress Easiest explanation: Edge distance is distance at right ANGLES to the direction of stress from centre of HOLE to adjacent edge. End distance is distance in the direction of stress from centre of hole to end of element.

Discussion

59.	In case of staggered pitch, pitch may be increased by ______(a) 50%(b) 20%(c) 100%(d) 30%I got this question during an interview.I'm obligated to ask this question of Bolted Connections topic in portion Bolted Connections of Design of Steel Structures
Answer» Right ANSWER is (a) 50% The best I can explain: Spacing between centres of fasteners MAY be increased by 50% when fasteners are staggered at equal INTERVAL and gauge does not exceed at 75mm, subjected to maximum spacing condition.

Discussion

60.	Pitch shall not be more than ___ in tension member and _______ in compression member.(a) 12t, 16t, where t = thickness of thinner plate(b) 20t, 16t, where t = thickness of thinner plate(c) 16t, 12t, where t = thickness of thinner plate(d) 16t, 20t, where t = thickness of thinner plateI have been asked this question by my college director while I was bunking the class.The doubt is from Bolted Connections topic in portion Bolted Connections of Design of Steel Structures
Answer» The CORRECT choice is (C) 16t, 12t, where t = thickness of THINNER plate For explanation I would SAY: Pitch SHALL not be more than 16t or 200mm, whichever is less in tension memberwhere t is thickness of thinner plate.Pitch shall not be more than 12t or 200mm, whichever is less in compression member, where t is thickness of thinner plate.

Discussion

61.	Maximum pitch distance = ______________(a) 16 x thickness of thinner plate(b) 32 x thickness of thinner plate(c) 40 x thickness of thinner plate(d) 20 x thickness of thinner plateThis question was posed to me in an international level competition.Query is from Bolted Connections topic in division Bolted Connections of Design of Steel Structures
Answer»

Discussion

62.	What is the minimum pitch distance?(a) 2.0 x nominal diameter of fastener(b) 3.0 x nominal diameter of fastener(c) 1.5 x nominal diameter of fastener(d) 2.5 x nominal diameter of fastenerThe question was posed to me at a job interview.This question is from Bolted Connections topic in portion Bolted Connections of Design of Steel Structures
Answer» Right option is (d) 2.5 x nominal diameter of fastener The explanation is: Pitch is CENTRE to centre SPACING of bolts in a row, MEASURED along direction of load. DISTANCE between centre to centre of fasteners shall not be more than 2.5 times nominal diameter of fasteners.

Discussion

63.	Which of the following is correct for pitch of the bolts and gauge?(a) pitch is measured along direction of load, gauge is measured perpendicular to direction of load(b) pitch is measured perpendicular direction of load, gauge is measured along to direction of load(c) pitch is measured along direction of load, gauge is measured along to direction of load(d) pitch is measured perpendicular direction of load, gauge is measured perpendicular to direction of loadThe question was posed to me in an international level competition.My question is taken from Bolted Connections topic in chapter Bolted Connections of Design of Steel Structures
Answer» The correct choice is (a) PITCH is measured along direction of load, GAUGE is measured perpendicular to direction of load Explanation: Pitch is centre to centre spacing of BOLTS in a row, measured along direction of load. Gauge is the distance between two consecutive bolts of adjacent row measured at right ANGLES to the direction of load.

Discussion

64.	Which of the following is correct?(a) size of hole = nominal diameter of fastener – clearances(b) size of hole = nominal diameter of fastener x clearances(c) size of hole = nominal diameter of fastener / clearances(d) size of hole = nominal diameter of fastener + clearancesI had been asked this question in homework.I'm obligated to ask this question of Bolted Connections topic in division Bolted Connections of Design of Steel Structures
Answer» The correct choice is (d) size of HOLE = NOMINAL DIAMETER of fastener + clearances For explanation: Size of hole = nominal diameter of fastener + clearances Clearance MAY be standard size, OVERSIZE, short slotted or long slotted.

Discussion

65.	Which of the following is advantage of HSFG bolts over bearing type bolts?(a) joints are not rigid(b) bolts are subjected to shearing and bearing stresses(c) high strength fatigue(d) low static strengthThe question was posed to me in an online quiz.Asked question is from Bolted Connections topic in division Bolted Connections of Design of Steel Structures
Answer» The correct answer is (c) high STRENGTH fatigue To explain I would say: The advantages of HSFG bolts over bearing type bolts are : (i) joints are rigid, (ii) bolts are not subjected to shearing and bearing stresses as load TRANSFER is mainly due to friction, (iii) high static strength due to high frictional resistance, (iv) high strength fatigue since nuts are prevented from loosening, (V)smaller number of bolts results into smaller number of gusset plates.

Discussion

66.	High strength bolt is used for ____________(a) shear connection(b) slip resistant connection only(c) bearing type connection only(d) both slip resistant and bearing type connectionI got this question by my school principal while I was bunking the class.The question is from Bolted Connections in section Bolted Connections of Design of Steel Structures
Answer» Right choice is (d) both slip resistant and bearing TYPE connection Best explanation: High strength bolt MAY be used for slip resistant and bearing type connection. At SERVICEABILITY, HSFG BOLTS do not slip and the joints are called slip resistant connections. At ultimate load, HSFG bolts do not slip and the joints behave LIKE bearing type connections.

Discussion

67.	What is the yield strength of bolt of class 4.6?(a) 400 N/mm^2(b) 240 N/mm^2(c) 250 N/mm^2(d) 500 N/mm^2This question was addressed to me in a job interview.Query is from Bolted Connections in chapter Bolted Connections of Design of Steel Structures
Answer» RIGHT choice is (b) 240 N/mm^2 Easiest explanation: For CLASS 4.6, ULTIMATE strength = 4×100 = 400 N/mm^2 yield strength / ultimate strength = 0.6 yield strength = 0.6×400 = 240 N/mm^2.

Discussion

68.	Rivets in group subjected to direct loads share load ________(a) equally(b) unequally(c) according to rivet diameter(d) rivets are not used in groupsThe question was asked at a job interview.This intriguing question originated from Riveted Connections in section Bolted Connections of Design of Steel Structures
Answer» The correct CHOICE is (a) equally The explanation is: Rivets in group SUBJECTED to DIRECT LOADS share load equally. Strength of group of rivets = Strength of single rivet x number of rivets in group.

Discussion

69.	Height of head for flat countersunk head rivet is ______(a) 0.7d, where d=nominal rivet diameter(b) 0.5d, where d=nominal rivet diameter(c) 0.43d, where d=nominal rivet diameter(d) 0.25d, where d=nominal rivet diameterI have been asked this question in an online quiz.My doubt is from Riveted Connections in chapter Bolted Connections of Design of Steel Structures
Answer» Correct ANSWER is (c) 0.43d, where d=nominal rivet diameter Best explanation: Diameter of head for (i) button head rivet = 0.7d, (II) flat COUNTERSUNK head rivet = 0.43d, (iii) flat head rivet = 0.25d, where d=nominal rivet diameter.

Discussion

70.	Which of the following assumption is true for rivet connection?(a) friction between plates is considered(b) distribution of direct stress on portions of plates between rivet holes is uniform(c) bending stresses are considered(d) shear stress is not uniform on cross section of rivetI have been asked this question in an interview for job.This interesting question is from Riveted Connections in chapter Bolted Connections of Design of Steel Structures
Answer» Correct option is (B) distribution of DIRECT stress on portions of plates between rivet holes is uniform For explanation: The assumptions for rivet CONNECTION are : (i) FRICTION between plates is neglected, (ii) distribution of direct stress on portions of plates between rivet holes is uniform, (iii) shear stress is uniform on cross section of rivet, (IV) bending stresses are neglected.

Discussion

71.	Tolerance on length for rivet diameter > 16mm is_____(a) 1.5mm(b) 2mm(c) 5mm(d) 3mmThe question was asked in an international level competition.My query is from Riveted Connections in section Bolted Connections of Design of Steel Structures
Answer» The CORRECT OPTION is (d) 3MM To explain I would say: Preferred nominal length of SHANK are 28,30,32,…..,225mm. Range of length depends on rivet diameter. Tolerance on length = 1.5mm, for rivet diameter ≤ 16mm and tolerance on length = 3mm, for rivet diameter > 16mm.

Discussion

72.	Diameter of head for button head rivet is ______(a) 1.60d, where d=nominal rivet diameter(b) 2.5d, where d=nominal rivet diameter(c) 3d, where d=nominal rivet diameter(d) 5d, where d=nominal rivet diameterThe question was asked in a job interview.My enquiry is from Riveted Connections topic in portion Bolted Connections of Design of Steel Structures
Answer» The correct answer is (a) 1.60d, where d=nominal rivet diameter For explanation: Diameter of head for (i) button head rivet = 1.6d, (ii) FLAT COUNTERSUNK head = 1.5d, (III) flat head = 2D, where d=nominal rivet diameter.

Discussion

73.	Which of the following is correct?(a) effective diameter of rivets = rivet hole diameter(b) effective diameter of rivets = nominal diameter of rivet(c) effective diameter of rivets = 1.5 x rivet hole diameter(d) effective diameter of rivets = 1.5 x nominal diameter of rivetI had been asked this question during an interview.Origin of the question is Riveted Connections topic in portion Bolted Connections of Design of Steel Structures
Answer» The correct choice is (b) effective diameter of RIVETS = NOMINAL diameter of rivet To explain I WOULD say: Effective diameter of rivet is TAKEN as rivet HOLE diameterinstead of nominal diameter of rivet. Rivet hole diameter is diameter of rivet + clearance.

Discussion

74.	Which of the following about rivet is correct?(a) causes low level of noise pollution(b) it does not require skilled work(c) labour cost is low(d) removing poorly installed rivet is costlyThis question was posed to me during an internship interview.I'd like to ask this question from Riveted Connections in portion Bolted Connections of Design of Steel Structures
Answer» Correct OPTION is (d) removing poorly installed rivet is COSTLY To elaborate: (i)Rivet connection is associated with high LEVEL of noise pollution, (ii)needs heating rivet to red hot, (III)inspection of connection is skilled work, (iv) removing poorly installed rivet is costly, (v)labour cost is high.

Discussion

75.	Hammering is done in rivet to _______(a) give proper shape to rivet(b) completely fill up the rivet hole(c) partially fill up the rivet hole(d) make a rivet holeThe question was asked during an online interview.The above asked question is from Riveted Connections in division Bolted Connections of Design of Steel Structures
Answer» Correct CHOICE is (B) completely fill up the rivet hole To explain: Holding red hot rivet at SHOP HEAD end, hammering is made. It RESULTS into expansion of rivet to completely fill up the rivet hole and also into formation at driven head.

Discussion

76.	Size of rivet hole is _________ size of rivet(a) more than(b) less than(c) equal to(d) not compared withThis question was posed to me in a national level competition.Question is taken from Riveted Connections topic in section Bolted Connections of Design of Steel Structures
Answer» CORRECT option is (a) more than For EXPLANATION: SIZE of rivet hole is kept slightly more than size of rivet. Size of rivet hole is 1.5mm more for rivet DIAMETER < 25MM Size of rivet hole is 2mm more for rivet diameter ≥ 25mm.

Discussion

77.	What is riveting?(a) the process of making holes in the structure(b) process of making mould for structure(c) method of joining together pieces of metal by inserting ductile metal pins called rivets(d) method of joining together pieces of metal by inserting non ductile metal pins called rivetsI had been asked this question in quiz.Origin of the question is Riveted Connections topic in portion Bolted Connections of Design of Steel Structures
Answer» The correct OPTION is (c) METHOD of joining together PIECES of metal by inserting ductile metal pins called rivets To explain: Riveting is the method of joining together pieces of metal by inserting ductile metal pins called rivets into holes of pieces to be CONNECTED and forming a head at end of rivet to prevent each metal piece from COMING out.

Discussion

Explore topic-wise InterviewSolutions in .

Tensile strength of bolt is given by(a) 0.9fubAn/1.1(b) 0.9fybAn/1.1(c) 0.9fubAn/1.25(d) 0.9fybAn/1.25I got this question by my school teacher while I was bunking the class.This interesting question is from Bolted Connections topic in portion Bolted Connections of Design of Steel Structures

In case of staggered pitch, pitch may be increased by ______(a) 50%(b) 20%(c) 100%(d) 30%I got this question during an interview.I'm obligated to ask this question of Bolted Connections topic in portion Bolted Connections of Design of Steel Structures

What is the yield strength of bolt of class 4.6?(a) 400 N/mm^2(b) 240 N/mm^2(c) 250 N/mm^2(d) 500 N/mm^2This question was addressed to me in a job interview.Query is from Bolted Connections in chapter Bolted Connections of Design of Steel Structures

Tolerance on length for rivet diameter > 16mm is_____(a) 1.5mm(b) 2mm(c) 5mm(d) 3mmThe question was asked in an international level competition.My query is from Riveted Connections in section Bolted Connections of Design of Steel Structures

Size of rivet hole is _________ size of rivet(a) more than(b) less than(c) equal to(d) not compared withThis question was posed to me in a national level competition.Question is taken from Riveted Connections topic in section Bolted Connections of Design of Steel Structures