127. The minimum width B of a solid casing for a cased beam, is equal to

A. B = + 25 mm

B. B = b + 50 mm

C. B = + 75 mm

D. B = b + 100 mm

128. A web plate is called unstiffened if the ratio of clear depth to thickness is less than

A.35

B.50

C.60

D.85

129. The distance between c.g. of compression and e.g. of tension flanges of a plate girder, is known as

A. overall depth

B. clear depth

C. effective depth

D. none of these.

130. In case horizontal stiffeners are not used, the distance between vertical legs of flange angles at the top and bottom of a plate girder, is known as

A. overall depth

B. clear depth

C. effective depth

D. none of these.

131. The distance between the outer faces of flanges of a plate girder, is known as

A. overall depth

B. clear depth

C. effective depth

D. none of these.

132. When the depth of a plate girder is at least n times the depth of vertical leg of the flange angles, the girder is known as deep plate girder, if n is

A.2

B.4

C.6

D.8

133. The failure of a web plate takes place by yielding if the ratio of the clear depth to thickness of the web, is less than

A.45

B.55

C.60

D.82

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