1. 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 end
Explanation: 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 along longitudinal axis of main member.
2. 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 times
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.
3. 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 whole
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.
4. 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 member
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.
5. Depth of intermediate batten = _______ depth of end batten
a) 1/2
b) 3/4
c) 1
d) 2
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.
6. Thickness of batten should not be less than
a) 1/40th of distance between innermost connecting lines of bolts
b) 1/50th of distance between innermost connecting lines of bolts
c) 1/100th of distance between innermost connecting lines of bolts
d) 1/10th of distance between innermost connecting lines of bolts
Explanation: Thickness of batten should not be less than 1/50th of distance between innermost connecting lines of rivets/bolts/welds perpendicular to main member.
7. A laced column is_____ than battened column for same load
a) equally strong
b) weaker
c) stronger
d) cannot be compared
Explanation: A laced column is stronger than battened column for same load, unsupported length and end conditions.
8. 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 50
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.
9. Minimum number of bolts for connecting end of strut is
a) 0
b) 3
c) 1
d) 2
Explanation: Ends of strut should be connected with minimum of 2 bolts/rivets or equivalent length of weld length (length must not be less than maximum width of member).
10. Which of the following is true?
a) when there is small spacing between the two sections placed back-to-back, washers and packing should be provided
b) when there is small spacing between the two sections placed back-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, minimum bolt is sufficient for connection
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 placed back-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.