The diameter of base of conical flare of a steel stack is (where d is the diameter of the cylindrical part)
A. Less than d
B. Equal to d
C. More than d
D. Any of the above
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A butt weld is specified by
A. Effective throat thickness
B. Plate thickness
C. Size of weld
D. Penetration thickness
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The bracing provided in the plane of end posts is called
A. Sway bracing
B. Portal bracing
C. Top lateral bracing
D. Bottom lateral bracing
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The allowable shear stress in the web of mild steel beams decreases with (where 'h' is height and 't' is thickness)
A. Decrease in h/t ratio
B. Increase in h/t ratio
C. Decrease in thickness
D. Increase in height
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For a compression member with double angle section, which of the following section will give larger value of minimum radius of gyration?
A. Equal angles back to back
B. Unqual legged angles with long legs back to back
C. Unequal legged angles with short legs back to back
D. Both (B) or (C)
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According to IS Specifications, the effective length of a column effectively held in position at both ends and restrained in direction at one end is taken as
A. 0.67 L
B. 0.8 L
C. L
D. 1.5 L
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compression force in two end posts The pin of a rocker bearing in a bridge is designed for
A. bearing and shear
B. bending and shear
C. bearing and bending
D. bearing, shear and bending
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According to IS Specifications, the maximum pitch of rivets in compression is (where t is thickness of thinnest outside plate or angle)
A. Lesser of 200 mm and 12t
B. Lesser of 200 mm and 16t
C. Lesser of 300 mm and 32t
D. Lesser of 300 mm and 24t
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As compared to field rivets, the shop rivets are
A. Stronger
B. Weaker
C. Equally strong
D. Any of the above
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Which of the following sections should preferably be used at places where torsion occurs?
A. Angle section
B. Channel section
C. Box type section
D. Any of the above
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When the bolts are subjected to reversal of stresses, the most suitable type of bolt is
A. Black bolt
B. Ordinary unfinished bolt
C. Turned and fitted bolt
D. High strength bolt
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Minimum thickness of web in a plate girder, when the plate is accessible and also exposed to weather, is
A. 5 mm
B. 6 mm
C. 8 mm
D. 10 mm
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The best arrangement to provide unified behaviour in built up steel columns is by
A. Lacing
B. Battening
C. Tie plates
D. Perforated cover plates
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The maximum spacing of vertical stiffeners is (where d is the distance between flange angles)
A. 1.33 d
B. 1.25 d
C. 1.5 d
D. 1.75 d
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Minimum spacing of vertical stiffeners is limited to (where d is the distance between flange angles)
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Which of the following types of riveted joint is free from bending stresses?
A. Lap joint
B. Butt joint with single cover plate
C. Butt joint with double cover plates
D. None of the above
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The risk coefficient k, depends on
A. Mean probable design life of structures
B. Basic wind speed
C. Both (A) and (B)
D. None of the above
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Economical depth of a plate girder corresponds to
A. Minimum weight
B. Minimum depth
C. Maximum weight
D. Minimum thickness of web
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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°
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The maximum slenderness ratio of a compression member carrying both dead and superimposed load is
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