98 + Interview Questions in Design Of Compression Members in Design Of Steel Structures Page 1 InterviewSolution

1.	The compressive strength for ISMB 400 used as a column for length 5m with both ends hinged is(a) 275 kN(b) 375.4 kN(c) 453 kN(d) 382 kNThis question was posed to me by my college professor while I was bunking the class.I want to ask this question from Design of Compression Members topic in section Design of Compression Members of Design of Steel Structures
Answer» Right OPTION is (B) 375.4 kN The best EXPLANATION: K = 1 for both ends hinged, KL = 1×5000 = 5000, r = 28.2mm (from steel table), Ae = 7846 mm^2(from steel table) KL/r = 5000/28.2 = 177.3 h/bf = 400/140 = 2.82, t = 16mm Therefore, BUCKLING class = b From table in IS code, fcd = 47.85MPa Pd = Ae fcd = 7846 X 47.85 = 375.43 kN.

Discussion

2.	The value of design compressive strength is limited to(a) fy + γm0(b) fy(c) fyγm0(d) fy / γm0This question was posed to me during an online exam.I would like to ask this question from Design of Compression Members in portion Design of Compression Members of Design of Steel Structures
Answer» Right choice is (d) FY / γm0 To elaborate: The value of DESIGN COMPRESSIVE STRENGTH is GIVEN by fcd = [fy / γm0] / [φ + (φ^2-λ^2)^0.5] ≤ fy / γm0 i.e. fcd should be less than or equal to fy / γm0.

Discussion

3.	What is the value of non dimensional slenderness ratio λ in the equation of design compressive strength?(a) (fy /fcc)(b) √(fy fcc)(c) √(fy /fcc)(d) (fy fcc)I had been asked this question during an internship interview.This key question is from Design of Compression Members topic in division Design of Compression Members of Design of Steel Structures
Answer» The correct option is (c) √(fy /fcc) The best I can EXPLAIN: The value of non dimensional SLENDERNESS ratio λ in the equation of design COMPRESSIVE strength is given by λ = √(fy /fcc) , where fy is YIELD stress of material and fcc = (π^2E)/(KL/r)^2, where E is modulus of elasticity of material and KL/r is effective slenderness ratio i.e. ratio of effective LENGTH.

Discussion

4.	The design compressive strength in terms of stress reduction factor is given by(a) Xfy(b) Xfy / γm0(c) X /fy γm0(d) Xfy γm0This question was posed to me by my college director while I was bunking the class.My question is from Design of Compression Members in portion Design of Compression Members of Design of Steel Structures
Answer» RIGHT ANSWER is (b) Xfy / γm0 The explanation is: The DESIGN compressive STRENGTH in terms of stress reduction factor is given by fcd = Xfy / γm0 , where X = stress reduction factor for different buckling class, slenderness ratio and yield stress = 1/ [φ + (φ^2-λ^2)^0.5], fy is yield stress of material and γm0 is partial SAFETY factor for material strength.

Discussion

5.	Euler buckling stress fcc is given by(a) (π^2E)/(KL/r)^2(b) (π^2E KL/r)^2(c) (π^2E)/(KL/r)(d) (π^2E)/(KLr)^2I got this question during an interview.The origin of the question is Design of Compression Members in chapter Design of Compression Members of Design of Steel Structures
Answer» Right answer is (a) (π^2E)/(KL/r)^2 To explain I would say: Euler buckling STRESS fcc is given by fcc = (π^2E)/(KL/r)^2, where E is modulus of ELASTICITY of MATERIAL and KL/r is effective slenderness ratio i.e. ratio of effective length, KL to APPROPRIATE radius of gyration, r.

Discussion

6.	The value of φ in the equation of design compressive strength is given by(a) φ = 0.5[1-α(λ-0.2)+λ^2].(b) φ = 0.5[1-α(λ-0.2)-+λ^2].(c) φ = 0.5[1+α(λ+0.2)-λ^2].(d) φ = 0.5[1+α(λ-0.2)+λ^2].This question was posed to me in a job interview.My question is based upon Design of Compression Members in chapter Design of Compression Members of Design of Steel Structures
Answer» The CORRECT answer is (d) φ = 0.5[1+α(λ-0.2)+λ^2]. For EXPLANATION: The VALUE of φ in the equation of design compressive strength is given by φ = 0.5[1+α(λ-0.2)+λ^2], where α is imperfection FACTOR(depends on buckling class) and λ is non-dimensional effective slenderness ratio.

Discussion

7.	If imperfection factor α = 0.49, then what is the buckling class?(a) a(b) c(c) b(d) gThis question was addressed to me in an online quiz.My doubt is from Design of Compression Members topic in chapter Design of Compression Members of Design of Steel Structures
Answer» The correct answer is (B) C Explanation: For buckling class c, the value of imperfection factor is 0.49. The imperfection factor takes into ACCOUNT all the relevant defects in real structure when considering buckling, geometric imperfections, eccentricity of applied loads and residual STRESSES.

Discussion

8.	The design compressive stress, fcd of column is given by(a) [fy / γm0]/ [φ – (φ^2-λ^2)^2].(b) [fy / γm0] / [φ + (φ^2-λ^2)].(c) [fy / γm0]/[φ – (φ^2-λ^2)^0.5].(d) [fy / γm0] / [φ + (φ^2-λ^2)^0.5].This question was addressed to me by my school principal while I was bunking the class.This intriguing question comes from Design of Compression Members topic in chapter Design of Compression Members of Design of Steel Structures
Answer» Right option is (d) [fy / γm0] / [φ + (φ^2-λ^2)^0.5]. Explanation: The design compressive STRESS, fcd of column is given by fcd = [fy / γm0] / [φ + (φ^2-λ^2)^0.5], where fy is YIELD stress of material, φ is dependent on imperfection FACTOR, λ is non DIMENSIONAL effective SLENDERNESS ratio.

Discussion

9.	The design compressive strength of member is given by(a) Aefcd(b) Ae /fcd(c) fcd(d) 0.5AefcdThis question was addressed to me by my college professor while I was bunking the class.This interesting question is from Design of Compression Members in division Design of Compression Members of Design of Steel Structures
Answer» The CORRECT OPTION is (a) Aefcd The EXPLANATION is: The design compressive strength of member is given by Pd= Aefcd, where Ae is effective sectional AREA, FCD is design compressive stress.

Discussion

10.	The outstand element of compression flange of a rolled section is 10.2 (ε=1). The flange will be classified as(a) compact(b) plastic(c) semi-compact(d) slenderThis question was posed to me in examination.My question comes from Design of Compression Members in division Design of Compression Members of Design of Steel Structures
Answer» Correct option is (a) COMPACT Easy EXPLANATION: The flange is classified as compact if outstand ELEMENT of COMPRESSION flange of rolled section is LESS than 10.5ε and for a welded section, less than 9.4ε.

Discussion

11.	The flange is classified as plastic if outstand element of compression flange ofrolled section is less than(a) 8.4ε(b) 9.4ε(c) 10.5ε(d) 15.7εI have been asked this question in an online interview.The query is from Design of Compression Members in division Design of Compression Members of Design of Steel Structures
Answer» Right choice is (b) 9.4ε The BEST I can explain: The flange is classified as PLASTIC if outstand ELEMENT of COMPRESSION flange of rolled section is less than 9.4ε and for a welded section, less than 8.4ε.

Discussion

12.	The flange is classified as semi-compact if outstand element of compression flange ofrolled section is less than(a) 8.4ε(b) 10.5ε(c) 15.7ε(d) 9.4εThe question was posed to me during a job interview.Enquiry is from Design of Compression Members in section Design of Compression Members of Design of Steel Structures
Answer» Correct ANSWER is (c) 15.7ε Explanation: The FLANGE is classified as semi-compact if outstand ELEMENT of compression flange of ROLLED section is less than 15.7ε and for a WELDED section, less than 13.6ε.

Discussion

13.	The best double-angle compression member section is(a) unequal angles with short leg connected(b) unequal angles with long leg connected(c) unequal angles on opposite side of gusset plate(d) unequal angles on same side of gusset plateThe question was posed to me in class test.My doubt stems from Design of Compression Members in division Design of Compression Members of Design of Steel Structures
Answer» CORRECT choice is (a) UNEQUAL ANGLES with short leg CONNECTED Explanation: Unequal angles with short leg connected are preferred as compression member section.

Discussion

14.	The best compression member section generally used is(a) single angle section(b) I-section(c) double angle section(d) channel sectionI have been asked this question during a job interview.Origin of the question is Design of Compression Members in portion Design of Compression Members of Design of Steel Structures
Answer» Right ANSWER is (b) I-section Best EXPLANATION: GENERALLY, ISHB SECTIONS are used as COMPRESSION members.

Discussion

15.	Which of the following is not a compression member?(a) strut(b) boom(c) tie(d) rafterI have been asked this question in unit test.My question comes from Design of Compression Members in portion Design of Compression Members of Design of Steel Structures
Answer» CORRECT ANSWER is (c) tie For explanation: STRUT, boom and rafter are compression members, whereas tie is a tension member.

Discussion

16.	The strength of compression members subjected to axial compression is defined by curves corresponding to _______ classes(a) a, b, c and d(b) a, d(c) b, e, f(d) e, f, gThe question was asked in unit test.My doubt stems from Design of Compression Members topic in portion Design of Compression Members of Design of Steel Structures
Answer» Right choice is (a) a, b, c and d Easiest explanation: The strength of compression members subjected to axial compression is defined by CURVES corresponding to a, b, c and d CLASSES. The value of imperfection FACTOR depends on TYPE of buckling curve.

Discussion

17.	A column that can support same load in compression as it can in tension is called(a) intermediate column(b) long column(c) short column(d) cannot be determinedThe question was asked during a job interview.I'd like to ask this question from Design of Compression Members topic in chapter Design of Compression Members of Design of Steel Structures
Answer» Correct option is (c) short COLUMN The EXPLANATION: A column that can support same load in COMPRESSION as it can in tension is CALLED short column. Short column usually fail by crushing.

Discussion

18.	Longitudinal spacing between intermittent welds used for connection should be(a) greater than 18t(b) greater than 16t(c) not greater than 16t(d) equal to 18tI got this question in examination.My query is from Back-to-Back Connection topic in section Design of Compression Members of Design of Steel Structures
Answer» Correct CHOICE is (c) not greater than 16T Explanation: Longitudinal spacing between INTERMITTENT WELDS used for connection should not be greater than 16t, where t is thickness of thinner connection.

Discussion

19.	For members placed back-to-back, the spacing of bolt should not exceed(a) 12t(b) 16t(c) 18t(d) 20tI got this question during an online exam.My doubt is from Back-to-Back Connection in portion Design of Compression Members of Design of Steel Structures
Answer» The correct OPTION is (a) 12t To EXPLAIN: For members PLACED back-to-back, the SPACING of bolt should not EXCEED 12t or 200mm, where t is thickness of member.

Discussion

20.	Members connected back-to-back connected by bolts should be(a) not be used(b) subjected to transverse loading in plane perpendicular to bolted surface(c) subjected to twice the transverse loading in plane perpendicular to bolted surface(d) not subjected to transverse loading in plane perpendicular to bolted surfaceI got this question in homework.My question is based upon Back-to-Back Connection in division Design of Compression Members of Design of Steel Structures
Answer» The CORRECT answer is (d) not subjected to TRANSVERSE loading in plane perpendicular to bolted surface Explanation: MEMBERS CONNECTED back-to-back connected by bolts should not be subjected to transverse loading in plane perpendicular to riveted/bolted/welded surface.

Discussion

21.	Which of the following is not true?(a) spacing of tack bolt should be less than 600mm(b) spacing of tack bolt should be greater than 600mm(c) if bolts are used, they should be spaced longitudinally at less than 4 times the bolt diameter(d) connection should extend at least 1.5 times the width of the memberThe question was posed to me in unit test.This interesting question is from Back-to-Back Connection topic in chapter Design of Compression Members of Design of Steel Structures
Answer» RIGHT answer is (B) spacing of tack bolt should be greater than 600mm To elaborate: Spacing of tack bolt should be less than 600mm. If BOLTS are used, they should be spaced longitudinally at less than 4 times the bolt diameter. CONNECTION should extend at LEAST 1.5 times the width of the member.

Discussion

22.	Minimum diameter of bolt when member is less than 16mm thick is(a) 8(b) 10(c) 22(d) 20The question was posed to me in class test.This intriguing question originated from Back-to-Back Connection topic in chapter Design of Compression Members of Design of Steel Structures
Answer» CORRECT choice is (c) 22 Best explanation: Rivets/bolts should not be LESS than 16mm in diameter for MEMBER less than 10mm THICK, 20mm in diameter for member less than 16mm thick and 22MM in diameter for member more than 16mm thick.

Discussion

23.	Which of the following is true?(a) when there is small spacing between the two sections placedback-to-back, washers and packing should be provided(b) when there is small spacing between the two sections placedback-to-back, washers and packing should not be provided(c) there should be additional connection in between along the length of member(d) when leg of angles greater than 125mm wide or web of channel is mm wide, minimumbolt is sufficient for connectionThe question was posed to me in class test.My doubt stems from Back-to-Back Connection topic in portion Design of Compression Members of Design of Steel Structures
Answer» The correct choice is (a) when there is small spacing between the two SECTIONS placedback-to-back, washers and packing should be provided The explanation: There should be minimum of two additional connection in between, SPACED equidistant along the length of member. When there is small spacing between the two sections placedback-to-back, washers(in case of bolts) and packing(in case of WELDING) should be provided to make connection. When leg of angles greater than 125mm wide or web of channel is MM wide, minimum two bolts/rivets should be for connection.

Discussion

24.	Minimum number of bolts for connecting end of strut is(a) 0(b) 3(c) 1(d) 2The question was asked in unit test.This intriguing question comes from Back-to-Back Connection in division Design of Compression Members of Design of Steel Structures
Answer»

Discussion

25.	The slenderness ratio of each member when placed back-to-back or separated by small distance shall be(a) greater than 40(b) not greater than 40(c) 0.8 times the slenderness ratio of column as a whole(d) greater than 50This question was posed to me by my school teacher while I was bunking the class.My query is from Back-to-Back Connection topic in portion Design of Compression Members of Design of Steel Structures
Answer» The correct answer is (B) not greater than 40 The explanation: Two rolled sections PLACED back-to-back or separated by small distance should be connected together by rivets/bolts/welds so that SLENDERNESS ratio of each member when placed back-to-back or separated by small distance is not greater than 40 or 0.6 times the slenderness ratio of column as a whole.

Discussion

26.	A laced column is_____ than battened column for same load(a) equally strong(b) weaker(c) stronger(d) cannot be comparedThe question was posed to me in an international level competition.My doubt is from Battens in division Design of Compression Members of Design of Steel Structures
Answer» RIGHT choice is (c) STRONGER Easiest EXPLANATION: A LACED column is stronger than battened column for same load, UNSUPPORTED length and end conditions.

Discussion

27.	Thickness of batten should not be less than(a) 1/40^th of distance between innermost connecting lines of bolts(b) 1/50^th of distance between innermost connecting lines of bolts(c) 1/100^th of distance between innermost connecting lines of bolts(d) 1/10^th of distance between innermost connecting lines of boltsThe question was asked during an interview.Query is from Battens topic in division Design of Compression Members of Design of Steel Structures
Answer» RIGHT ANSWER is (b) 1/50^th of distance between innermost CONNECTING lines of bolts Explanation: Thickness of batten should not be less than 1/50^th of distance between innermost connecting lines of rivets/bolts/welds PERPENDICULAR to main member.

Discussion

28.	Depth of intermediate batten = _______ depth of end batten(a) 1/2(b) 3/4(c) 1(d) 2The question was posed to me in a job interview.This question is from Battens in portion Design of Compression Members of Design of Steel Structures
Answer» The CORRECT choice is (b) 3/4 For EXPLANATION: DEPTH of intermediate batten is taken as three fourth of the effective depth of end batten and should be more than twice the width of component MEMBER.

Discussion

29.	Which of the following is true about effective depth of end batten?(a) it should be less than distance between centre of gravity of component(b) it should be half the distance between centre of gravity of component(c) it should be less than twice the width of component member(d) it should be greater than twice the width of component memberThis question was posed to me by my college director while I was bunking the class.This intriguing question comes from Battens topic in division Design of Compression Members of Design of Steel Structures
Answer» The correct choice is (d) it should be greater than twice the width of COMPONENT MEMBER The explanation: EFFECTIVE depth of end BATTEN should not be less than distance between centre of gravity of component and should be greater than twice the width of component member.

Discussion

30.	Maximum spacing of batten should be such that slenderness ratio of component member should be(a) not greater than 50(b) greater than 50(c) greater than 0.7 times slenderness ratio of member as a whole(d) greater than slenderness ratio of member as a wholeI have been asked this question in final exam.My query is from Battens in division Design of Compression Members of Design of Steel Structures
Answer» The CORRECT option is (a) not GREATER than 50 Explanation: Maximum spacing of batten should be such that slenderness RATIO of component MEMBER should be not greater than 50 or 0.7 times slenderness ratio of member as a whole, about AXIS parallel to end of battens.

Discussion

31.	Effective slenderness ratio of battened column shall be ____ of actual slenderness ratio of column(a) 0.5 times(b) 1.1 times(c) 2 times(d) 2.5 timesThis question was posed to me during an online interview.This key question is from Battens topic in chapter Design of Compression Members of Design of Steel Structures
Answer» The correct choice is (b) 1.1 times Best explanation: Effective slenderness RATIO of BATTENED column SHALL be 1.1 times the maximum actual slenderness ratio of column to account for SHEAR deformation effects.

Discussion

32.	Which of the following is correct?(a) length of weld connecting each end of batten should be less than one fourth the depth of plate(b) length of weld and depth of batten shall be measured perpendicular to longitudinal axis of member(c) weld shall be returned only along other two edges for length less than minimum lap(d) length of weld connecting each end of batten should be such that at least one third of its length should be placed on each endThe question was asked in homework.Origin of the question is Battens in chapter Design of Compression Members of Design of Steel Structures
Answer» Right answer is (d) length of weld connecting each end of batten should be such that at least one third of its length should be PLACED on each end To EXPLAIN: Length of weld connecting each end of batten shall be more than half the depth of plate. Length of weld connecting each end of batten should be such that at least one third of its length should be placed on each end. Weld shall be RETURNED only along other two edges for length LESS than minimum lap. Length of weld and depth of batten shall be measured alonglongitudinal axis of main member.

Discussion

33.	Thickness of batten plates shall be(a) not less than 1/50^th of distance between innermost connecting transverse bolts/rivets(b) less than 1/50^th of distance between innermost connecting transverse bolts/rivets(c) less than 1/60^th of distance between innermost connecting transverse bolts/rivets(d) less than 1/80^th of distance between innermost connecting transverse bolts/rivetsThis question was addressed to me in an online quiz.My question is based upon Battens topic in section Design of Compression Members of Design of Steel Structures
Answer»

Discussion

34.	Which of the following is true about effective depth of battens?(a) less than perpendicular distance between centroids for end battens(b) less than three quarters of the perpendicular distance between centroids for intermediate battens(c) not less than twice the width of one member in plane of batten(d) less than twice the width of one member in plane of battenThe question was asked during an online exam.My query is from Battens topic in chapter Design of Compression Members of Design of Steel Structures
Answer» Right option is (c) not LESS than TWICE the width of one member in plane of batten Easiest EXPLANATION: When PLATES are used for battens, effective depth between end bolts/rivets or welds should not be less than twice the width of one member in plane of batten, not less than PERPENDICULAR distance between centroids for end battens and not less than three quarters of the perpendicular distance between centroids for intermediate battens.

Discussion

35.	Battens should be designed to resist moment equal to(a) Vt L0 n(b) Vt L0 / n(c) Vt /L0 n(d) Vt L0 /2nThis question was posed to me by my college professor while I was bunking the class.The above asked question is from Battens topic in chapter Design of Compression Members of Design of Steel Structures
Answer»

Discussion

36.	Battens should be designed to resist longitudinal shear equal to(a) Vt L0 ns(b) Vt L0 / ns(c) Vt /L0 ns(d) Vt L0n/sThe question was posed to me in final exam.This question is from Battens topic in section Design of Compression Members of Design of Steel Structures
Answer» Right answer is (b) Vt L0 / ns Easy explanation: Battens should be designed to resist longitudinal shear EQUAL to V = Vt L0 / ns , where Vt is transverse shear force, L0 is distance between centre-to-centre of battens longitudinally, s is minimum transverse distance between centroids of bolt/rivet group/ welding connecting BATTEN to main MEMBER, n is number of parallel PLANES of battens.

Discussion

37.	Battens should be designed to resist transverse shear force which is(a) 5% of axial force(b) 0.5% of axial force(c) 2.5% of axial force(d) 7.2% of axial forceI have been asked this question during an interview.This interesting question is from Battens topic in section Design of Compression Members of Design of Steel Structures
Answer» Correct OPTION is (c) 2.5% of axial force The explanation: Battens should be designed to resist transverse shear force which is 2.5% of TOTAL axial force on whole COMPRESSION member. This transverse shear force is divided EQUALLY in all parallel planes in which, there is shear resisting ELEMENTS.

Discussion

38.	Which of the following statement is true?(a) Number of battens in a column should be such that member is divided into not less than three bays(b) Number of battens in a column should be such that member is divided into less than three bays(c) Number of battens in a column should be such that member is divided into less than two bays(d) No restriction on number of battensThis question was addressed to me in exam.My question comes from Battens topic in portion Design of Compression Members of Design of Steel Structures
Answer» The correct CHOICE is (a) Number of BATTENS in a column should be such that member is divided into not less than three bays Easy explanation: Battens are PLATES or any other rolled section used to CONNECT the main components of compression members. Battens should be placed opposite to each other on the two parallel FACES of compression members.Number of battens in a column should be such that member is divided into not less than three bays.

Discussion

39.	The load on rivet/bolt when two lacing flats are connected at same point is(a) (Vt / N) cotΘ(b) 2(Vt / N) cotΘ(c) 2Vt N cotΘ(d) Vt NcotΘThe question was posed to me in an online quiz.My question is based upon Lacings topic in chapter Design of Compression Members of Design of Steel Structures
Answer» Correct choice is (B) 2(Vt / N) cotΘ The explanation: Strength of BOLT /rivet should be greater than load COMING over rivet/bolt. The load on rivet/bolt when two lacing FLATS are connected at same point is 2(Vt/N)cotΘ.

Discussion

40.	Effective slenderness ratio of laced column shall be _________(a) equal to the maximum slenderness ratio of column(b) 1.05 times the maximum slenderness ratio of column(c) 0.5 times the maximum slenderness ratio of column(d) 2 times the maximum slenderness ratio of columnThis question was addressed to me during an interview for a job.This intriguing question originated from Lacings topic in chapter Design of Compression Members of Design of Steel Structures
Answer» The CORRECT option is (B) 1.05 TIMES the maximum slenderness ratio of COLUMN Easiest explanation: Effective slenderness ratio of laced column SHALL be taken as 5% more than the maximum slenderness ratio of column i.e. 1.05 times the maximum slenderness ratio of column, to account for shear deformation effects.

Discussion

41.	lacing bars shall be inclined at an angle of ___ to axis of built up member.(a) 20^o(b) 35^o(c) 50^o(d) 90^oI had been asked this question in final exam.Question is taken from Lacings topic in chapter Design of Compression Members of Design of Steel Structures
Answer» Correct CHOICE is (c) 50^o The explanation is: Lacing BARS SHALL be inclined at an ANGLE of 40^o to 70^o to AXIS of built up member.

Discussion

42.	Which of the following is not true?(a) when welded lacing bars overlap main members, amount of lap should not be less than 4 times thickness of bar(b) welding is to be provided along each side of bar for full length of lap(c) lacing bars fitted between main members should be connected by fillet welds on each side(d) when lacing bars are not lapped to form connection to components of members, appreciable interruption in triangulated system is allowedThe question was asked by my college professor while I was bunking the class.Query is from Lacings in section Design of Compression Members of Design of Steel Structures
Answer» Right option is (d) when lacing bars are not lapped to form connection to components of members, appreciable interruption in triangulated system is allowed Easiest EXPLANATION: When welded lacing bars overlap MAIN members, amount of lap should not be less than 4 TIMES thickness of bar. Welding is to be provided along each side of bar for full length of lap. Lacing bars fitted between main members should be CONNECTED by full penetration butt weldor fillet welds on each side. Lacing bars SHALL be connected such that there is no appreciable interruption in triangulated system when lacing bars are not lapped to form connection to components of members.

Discussion

43.	Which of the following condition should be satisfied for spacing of lacings?(a) maximum slenderness ratio of component of main members between two consecutive lacing connection should be greater than 50(b) maximum slenderness ratio of component of main members between two consecutive lacing connection should be not greater than 50(c) maximum slenderness ratio of component of main members between two consecutive lacing connection should be more than 0.7 x most unfavourable slenderness ratio of combined column(d) maximum slenderness ratio of component of main members between two consecutive lacing connection should not be more than 0.9 x most unfavourable slenderness ratio of combined columnThe question was asked in exam.The query is from Lacings topic in section Design of Compression Members of Design of Steel Structures
Answer» Correct choice is (b) maximum SLENDERNESS ratio of component of main MEMBERS between two consecutive lacing CONNECTION should be not greater than 50 Easy explanation: The spacing of lacing BARS should be such that maximum slenderness ratio of component of main members between two consecutive lacing connection is not greater than 50. It should not be greater than 0.7 times most unfavourable slenderness ratio of combined column.

Discussion

44.	Thickness of lacing member should be(a) less than 1/40^th of the effective length for single lacing(b) not less than 1/60^th of the effective length for double lacing(c) less than 1/60^thof the effective length for double lacing(d) less than 1/60^th of the effective length for single lacingThe question was asked in an interview for job.Question is taken from Lacings topic in division Design of Compression Members of Design of Steel Structures
Answer» RIGHT option is (b) not LESS than 1/60^th of the effective length for double lacing The explanation is: THICKNESS of lacing member should not be less than 1/40^th of the effective length for SINGLE lacing and not less than 1/60^th of the effective length for double lacing.

Discussion

45.	Minimum width of lacing bars shall _______(a) be less than 3 times diameter of connecting bolt/rivet(b) be less than 5 times diameter of connecting bolt/rivet(c) not be less than 3 times diameter of connecting bolt/rivet(d) be less than 2 times diameter of connecting bolt/rivetThe question was asked by my school principal while I was bunking the class.The question is from Lacings in portion Design of Compression Members of Design of Steel Structures
Answer» Right option is (C) not be less than 3 TIMES diameter of CONNECTING bolt/rivet The explanation: Minimum width of LACING bars shall not be less than approximately 3 times the diameter of connecting bolt/rivet.

Discussion

46.	Which of the following is true about effective length?(a) effective length shall be taken as length between inner end bolts/rivets of bars for single lacings(b) effective length shall be taken as length between inner end bolts/rivets of bars for double lacings(c) for welded bars, effective length shall be taken as 0.9 times distance betweeninner end welds connecting single bars to members(d) effective length shall be taken as 1.5 times length between inner end bolts/rivets of bars for double lacingsI got this question during an internship interview.This intriguing question comes from Lacings in division Design of Compression Members of Design of Steel Structures
Answer» The correct option is (a) effective LENGTH shall be taken as length between INNER END bolts/rivets of bars for SINGLE lacings For explanation I would say: Effective length shall be taken as length between inner end bolts/rivets of bars for single lacings and 0.7 times length between inner end bolts/rivets of bars for double lacings. For welded bars, effective length shall be taken as 0.7 times distance betweeninner end WELDS connecting single bars to members.

Discussion

47.	Slenderness ratio of lacing is limited to(a) 200(b) 145(c) 500(d) 380I got this question in an online interview.My doubt stems from Lacings topic in section Design of Compression Members of Design of Steel Structures
Answer» RIGHT option is (b) 145 The EXPLANATION: SLENDERNESS ratio is the ratio of effective length by radius of gyration. Slenderness ratio of lacing shall not EXCEED 145.

Discussion

48.	Lacing shall be designed to resist a total transverse shear equal to ____ of axial force in member(a) 5%(b) 1%(c) 4.3%(d) 2.5%This question was posed to me in exam.Asked question is from Lacings topic in chapter Design of Compression Members of Design of Steel Structures
Answer»

Discussion

49.	Which of the following is correct?(a) lacings and battens should not be provided on opposite sides of same member(b) lacing system should not be uniform throughout length of column(c) single and double laced systems should be provided on opposite sides of same member(d) single laced system on opposite of main component shall be in opposite direction view from either sideI had been asked this question in an interview for internship.My question is based upon Lacings in portion Design of Compression Members of Design of Steel Structures
Answer»

Discussion

50.	The radius of gyration of combined column about axis perpendicular to plane of lacing should be _____ than about axis parallel to plane of lacing.(a) cannot be compared(b) smaller(c) greater(d) equal toThe question was asked during an interview.Origin of the question is Lacings in chapter Design of Compression Members of Design of Steel Structures
Answer» RIGHT choice is (c) greater Explanation: The radius of gyration of combined column about AXIS perpendicular to PLANE of LACING should be greater than about axis parallel to plane of lacing.

Discussion

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A laced column is_____ than battened column for same load(a) equally strong(b) weaker(c) stronger(d) cannot be comparedThe question was posed to me in an international level competition.My doubt is from Battens in division Design of Compression Members of Design of Steel Structures

Depth of intermediate batten = _______ depth of end batten(a) 1/2(b) 3/4(c) 1(d) 2The question was posed to me in a job interview.This question is from Battens in portion Design of Compression Members of Design of Steel Structures

Battens should be designed to resist longitudinal shear equal to(a) Vt L0 ns(b) Vt L0 / ns(c) Vt /L0 ns(d) Vt L0n/sThe question was posed to me in final exam.This question is from Battens topic in section Design of Compression Members of Design of Steel Structures

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lacing bars shall be inclined at an angle of ___ to axis of built up member.(a) 20^o(b) 35^o(c) 50^o(d) 90^oI had been asked this question in final exam.Question is taken from Lacings topic in chapter Design of Compression Members of Design of Steel Structures

Slenderness ratio of lacing is limited to(a) 200(b) 145(c) 500(d) 380I got this question in an online interview.My doubt stems from Lacings topic in section Design of Compression Members of Design of Steel Structures

Lacing shall be designed to resist a total transverse shear equal to ____ of axial force in member(a) 5%(b) 1%(c) 4.3%(d) 2.5%This question was posed to me in exam.Asked question is from Lacings topic in chapter Design of Compression Members of Design of Steel Structures