Steel Structures design 2

 21.When the load line coincides with the centre of gravity of the rivet group, then the rivets are subjected to ?

• shear only 
• tension only 
• bending only 
• both shear and tension 

22.When a load is exerted or transferred from one surface to another in contact, the stress is known as ?

• direct stress 
• bending stress 
• bearing stress 
• shear stress 

23.The common assumption that 'all rivets share equally a non-eccentric load' is valid at a load ?

• below the working load 
• equal to the working load 
• above the working load 
• equal to the failure load 

24.The longitudinal space between the effective length of intermittent butt welds is taken not more than ?

• four times the thickness of the thicker part joined 
• four times the thickness of the thinner part joined 
• sixteen times the thickness of the thicker part joined 
• sixteen times the thickness of the thinner part joined 

25.The working stress is the stress which may be developed in the member ?

• causing structural damage to it 
• causing residual strain 
• without causing structural damage to it 
• none of these 

26.The reinforcement of butt weld ?

• is ignored in calculating stresses 
• increases efficiency of joint 
• should not exceed 3 mm 
• all of these 

27.The structural analysis deals with the ?

• determination of loads and other forces to which the various parts of the structure are subjected 
• selection of proper material 
• selection of proper size and shape of each member 
• none of the above 

28.A joint in the length of a column is known as ?

• shear joint 
• load bearing joint 
• column splice 
• compression joint 

29.Allowable working stress in compression in the column splice plates may be taken as ?

• 60 N/mm² 
• 80 N/mm² 
• 100 N/mm² 
• 125 N/mm² 

30.The formula which takes into account any initial crookedness of the column and imperfectness of axial loading is ?

• Perry-Robertson formula 
• Euler's formula 
• Secant formula 
• Rankine's formula.

31.Net sectional area of a tension member is equal to ?

• axial pull x allowable stress in axial tension 
• axial pull - allowable stress in axial tension 
• axial pull + allowable stress in axial tension 
• none of the above 

32.The effective length of a fillet weld is taken as ?

• the actual length plus twice the size of weld 
• the actual length minus twice the size of weld 
• the actual length plus thrice the size of weld 
• the actual length minus thrice the size of weld 

33.The maximum allowable stress for rolled steel beams and channels is ?

• 128.5 MPa 
• 156.5 MPa 
• 181.5 MPa 
• 228.5 MPa 

34.A skeleton structure is one in which the member is represented by a ?

• circular curve 
• straight curve 
• line 
• all of these 

35.A channel section consists of ?

• two webs 
• two flanges 
• two webs and two flanges 
• one web and two flanges 

36.A structural member subjected to compressive force in a direction parallel to its longitudinal axis is called ?

• column 
• post 
• stanchion 
• any of these 

37.The main advantage of a steel member is that it ?

• has high strength 
• is gas and water tight 
• has long service life 
• all of these 

38.The axial load which is sufficient to keep the column in a slight deflected shape is called ?

• critical load 
• crippling load 
• buckling load 
• any one of these 

39.The bearing stress is calculated on the ?

• cross-sectional area of contact 
• net projected area of contact 
• mean of cross-sectional area and net projected area of contact 
• none of the above 

40.The effective length of continuous compression members is adopted between .......... times the distance between centres of intersection ?

• 0.7 and 1 
• 1 and 1.3 
• 1.3 and 1.6 
• 1.6 and 2.