Design of Steel Structures

311. When the upper column does not provide full bearing area over lower column, the column splice is provided with the following assumption

1. Bearing plate is assumed as a short beam to transmit the axial load to the lower column section
2. Axial load is assumed to be taken by flanges
3. Load transmitted from the flanges of upper column and reactions from the flanges of lower columns are equal and form a couple
4. All the above

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312. When two plates are placed end to end and are joined by two cover plates, the joint is known as

1. Lap joint
2. Butt joint
3. Chain riveted lap joint
4. Double cover butt joint

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313. Which of the following conditions is to be satisfied both in elastic and plastic analysis?

1. Equilibrium condition
2. Yield condition
3. Plastic moment condition
4. Mechanism condition

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314. Which of the following sections should preferably be used at places where torsion occurs?

1. Angle section
2. Channel section
3. Box type section
4. Any of the above

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315. Which of the following types of riveted joint is free from bending stresses?

1. Lap joint
2. Butt joint with single cover plate
3. Butt joint with double cover plates
4. None of the above

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316. With a percentage increase of carbon in steel, decreases its

1. Strength
2. Hardness
3. Brittleness
4. Ductility

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317. With usual notations of the letters, the shear stress f_s at any point of the cross-section is given by

1. f_s =FQ/It
2. f_s =Ft/IQ
3. f_s =It/FQ
4. f_s =IF/Qt

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318. Working shear stress on the gross area of a rivet as recommended by Indian Standards, is

1. 785 kg/cm²
2. 1025 kg/cm²
3. 2360 kg/cm²
4. None of these

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