Design Of Steel Structures Set 2 MCQs

Q1 | The bracing provided in the plane of end posts is called

sway bracing

portal bracing

top lateral bracing

bottom lateral bracing

Q2 | In a built up beam actual bending compressive stress fbc is given by (when y1 is the distance of theedge of the beam from the neutral axis).

fbc = (m/ixx) × y

fbc = (ixx/m) × y

fbc = (ixx/m) + y

fbc = (m/ixx) + y

Q3 | If the thickness of a structural member is small as compared to its length and width, it is classifiedas

one dimensional

two dimensional

three dimensional

none of these

Q4 | The statical method of plastic analysis satisfies

equilibrium and mechanism conditions

equilibrium and plastic moment conditions

mechanism and plastic moment conditions

equilibrium condition only

Q5 | Lug angle is

used with single angle member

not used with double angle member

used with channel member

all the above

Q6 | For the economical design of a combined footing to support two equal column loads, theprojections of beams in lower tier are kept such that bending moment under column is equal to

bending moment at the centre of the beam

half the bending moment at the centre of the beam

twice the bending moment at the centre of the beam

none of these

Q7 | Stiffeners are used in a plate girder

to reduce the compressive stress

to reduce the shear stress

to take the bearing stress

to avoid bulking of web plate

Q8 | As compared to field rivets, the shop rivets are

stronger

weaker

equally strong

any of the above

Q9 | A fillet weld whose axis is parallel to the direction of the applied load, is known as

diagonal filler weld

end fillet weld

side fillet weld

all the above

Q10 | In a truss girder of a bridge, a diagonal consists of mild steel flat 4001.S.F. and carries a pull of 80tonnes. If the gross-diameter of the rivet is 26 mm, the number of rivets required in the splice, is

6

7

8

9

Q11 | When the bolts are subjected to reversal of stresses, the most suitable type of bolt is

black bolt

ordinary unfinished bolt

turned and fitted bolt

high strength bolt

Q12 | Factor of safety is the ratio of

yield stress to working stress

tensile stress to working stress

compressive stress to working stress

bearing stress to working stress

Q13 | The best arrangement to provide unified behaviour in built up steel columns is by

lacing

battening

tie plates

perforated cover plates

Q14 | The ratio of shearing stress to shearing strain within elastic limit, is known as

modulus of elasticity

shear modulus of elasticity

bulk modulus of elasticity

tangent modulus of elasticity

Q15 | In a built up section carrying a tensile force, the flanges of two channels are turned outward

to simplify the transverse connections

to minimise lacing

to have greater lateral rigidity

all the above

Q16 | A fillet weld may be termed as

mitre weld

concave weld

convex weld

all the above

Q17 | Gantry girders are designed to resist

lateral loads

longitudinal loads and vertical loads

lateral, longitudinal and vertical loads

lateral and longitudinal loads

Q18 | The distance between e.g. of compression and e.g. of tension flanges of a plate girder, is known as

overall depth

clear depth

effective depth

none of these

Q19 | The effective length of a compression member of length L held in position at both ends but notrestrained in direction, is

l

0.67 l

0.85 l

1.5 l

Q20 | The live load for a sloping roof with slope 15°, where access is not provided to roof, is taken as

0.65 kn/m²

0.75 kn/m²

1.35 kn/m²

1.50 kn/m²

Q21 | Design of a riveted joint is based on the assumption:

bending stress in rivets is accounted for

riveted hole is assumed to be completely filled by the rivet

stress in the plate in not uniform

friction between plates is taken into account

Q22 | Steel tanks are mainly designed for

weight of tank

wind pressure

water pressure

earthquake forces

Q23 | The cross-section of a standard fillet is a triangle whose base angles are

45° and 45°

30° and 60°

40° and 50°

20° and 70°

Q24 | The sway bracing is designed to transfer

2vi % of the top panel wind load to bottom bracing

10% of the top panel wind load to bottom bracing

25% of the top panel wind load to bottom bracing

50% of the top panel wind load to bottom bracing

Q25 | Cold driven rivets range from

6 to 10 mm in diameter

10 to 16 mm in diameter

12 to 22 mm in diameter

22 to 32 mm in diameter