169.  The Indian stambard code which deals with steel structures, is
A. IS :875
B. IS :800
C. IS : 456
D. IS: 1893.

---

170.  For a column of height L fixed in position and direction both at its top and bottom, its effective length, is
A. 0.67 L
B. L
C. 1.5 L
D. 2L.

---

171.  Stiffeners are used in a plate girder
A. to reduce the compressive stress
B. to reduce the shear stress
C. to take the bearing stress
D. to avoid bullring of web plate.

---

172.  A 20 anal din steel bar which is subjected to an axial tension of 2300 kg/cm2 produces a stair: of 0,004 ern, If Young's modulus of steel is 2.1 x 1.06 kg/cm, the bar is
A. in the 'elastic range
B. in the plastic range
C. at Yield point
D.

---

173. If d is the distance between the flange angles,
A. vertical stiffeners are provided in steel plate girders if the web is less than d/85
B. vertical stiffeners are provided in high tensile steel plate girders if the web is less than d1175
C. horizontal stiffeners are provided in high tensile girder steel plate if the web is less than d/180
D. All the above.

---

174. If d is the distance between the flange angles, the vertical stiffeners in plate girders are spaced not greater than
A. d
B. 1.25 d
C. 1.5 d
D. 1.75 d

---

175. If d is the distance between the flange angles, the vertical stiffeners in plate girders without horizontal stiffeners, are spaced at a distance not less than
A. 0.15 d
B. 0.22 d
C. 0.33 d
D. 0.44 d

---