Latest Design of Steel Structures Multiple choice Questions and Answers pdf

31.    The best arrangement to provide unified behavior in built up steel columns is by
a)    lacing
b)    battening
c)    tie plates
d)    perforated cover plates

Ans: a

32.    If the 20 mm rivets are used in lacing bars, then the minimum width of lacing bar should be
a)    40mm
b)    60mm
c)    80mm
d)    100mm

Ans: b

33.    The use of tie plates in laced columns is
a)    prohibited
b)    not prohibited
c)    permitted at start and end of lacing system only
d)    permitted between two parts of the lacing

Ans: c

34.    Lacing bars in a steel column should be designed to resist
a)    bending moment due to 2.5% of the column load
b)    shear force due to 2.5% of the column load
c)    2.5% of the column load
d)    both (a) and (b)

Ans: b

35.    Angle of inclination of the lacing bar with the longitudinal axis of the column should preferably be between
a)    10° to 30°
b)    30° to 40°
c)    40° to 70°
d)    90°

Ans: c

36.    Battening is preferable when the
i)    column carries axial load only
ii)   space between the two main components is not very large
iii) column is eccentrically loaded The correct answer is
a)    only (i)
b)    only (iii)
c)    (i) and (ii)
d)    (ii) and (iii)

Ans: c

37.    The effective length of a battened column is increased by
a)    5%
b)    10%
c)    15%
d)    20%

Ans: b

38.    The overlap of batten plates with the main members in welded connections should be more than
a)    3t
b)    4t
c)    6t
d)    8t
where t = thickness of the batten plate

Ans: b

39.    The slenderness ratio of lacing bars should not exceed
a)    100
b)    120
c)    145
d)    180

Ans: c

40.    Economical depth of a plate girder corresponds to
a)    minimum weight
b)    minimum depth
c)    maximum weight
d)    minimum thickness of web