According to IS:800, in the Merchant Rankine formula the value of imperfection index (n) is_______________?

Related Mcqs:

1. Efficiency of a riveted joint, having the minimum pitch as per IS : 800, is_________________?

   A. 40%
   B. 50%
   C. 60%
   D. 70%

2. As per IS : 800, for compression flange, the outstand of flange plates should not exceed________________?

   A. 121
   B. 161
   C. 201
   D. 251

   where t = thickness of thinnest flange plate

3. As per IS:800, in the plastic design, which of the following pairs are correctly matched? Working Loads Load factor________________?

   (i) Dead load 1.7
   (ii) Dead Load + imposed load 1.7
   (iii) Dead load + load due to wind or 1.3 seismic forces
   (iv) Dead load + imposed load + load 1.7

   due to wind or seismic forces Of these statements

   A. (i) and (ii) are correct
   B. (i), (ii) and (iii) are correct
   C. (ii) and (iii) are correct
   D. only (i) is correct

4. In case of plastic design, the calculated maximum shear capacity of a beam as per IS:800 shall be________________?

   A. 0.55 Awfy
   B. 0.65 Awfy
   C. 0.75 Awfy
   D. 0.85 Awfy
   where, Aw = effective cross-sectional area resisting shear fy = yield stress of the steel

5. If the thickness of plate to be connected by a rivet is 16 mm, then suitable size of rivet as per Unwin’s formula will be__________________?

   A. 16 mm
   B. 20 mm
   C. 24 mm
   D. 27 mm

6. Hudson’s formula gives the dead weight of a truss bridge as a function of_________________?

   A. bottom chord area
   B. top chord area
   C. effective span of bridge
   D. heaviest axle load of engine

7. In case of timber structures, the simple bending formula M = fz may be applied for________________?

   A. rectangular beams up to 300 mm depth
   B. all rectangular beams
   C. solid circular beams only
   D. all square cross-section beams

8. For a standard 45° fillet, the ratio of size of fillet to throat thickness is_______________?

   A. 1:1
   B. 1 : V2
   C. V2 : 1
   D. 2: 1

9. Other conditions being same, the load factor in indeterminate structures is_______________?

   A. equal to load factor in determinate structures
   B. more than the load factor in determinate structures
   C. less than the load factor in determinate structures
   D. unpredictable

10. The basic wind speed is specified at a height ‘h’ above mean ground level in an open terrain. The value of’h’ is__________________?

    A. 10 m
    B. 20 m
    C. 25 m
    D. 50 m