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4

The maximum permissible slenderness ratio of a member carrying loads resulting from wind, is

A. 180

B. 200

C. 250

D. 300

Correct Answer :

C. 250


Related Questions

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4

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

A. 1.0

B. 1.4

C. 1.8

D. 2.0

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4

Rolled steel angle sections are classified as

A. Equal angles

B. Unequal angles

C. Bulb angles

D. All the above

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4

The slenderness ratio of a column supported throughout its length by a masonry wall is

A. Zero

B. 10

C. 100

D. Infinity

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4

The maximum axial load which is just sufficient to keep a column in a small deflected shape, is called

A. Crippling load

B. Buckling load

C. Critical load

D. All the above

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4

According to IS Specifications, the effective length of a column effectively held in position at both ends and restrained in direction at one end is taken as

A. 0.67 L

B. 0.8 L

C. L

D. 1.5 L

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4

The minimum thickness of plates in a steel stack should be

A. 4 mm

B. 5 mm

C. 6 mm

D. 8 mm

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4

Rolled steel beams are:

A. Mainly used to resist bending stress

B. Used as independent sections to resist compressive stress

C. Used as independent sections to resist tensile stress

D. All the above

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4

Length of an outstanding leg of a vertical stiffener, may be taken equal to

A. 1/10th of clear depth of the girder plus 15 mm

B. 1/20th of clear depth of the girder plus 20 mm

C. 1/25th of clear depth of the girder plus 25 mm

D. 1/30th of clear depth of the girder plus 50 mm

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4

Effective length of a column effectively held in position at both ends and restrained in direction at one end, is

A. L

B. 0.67 L

C. 0.85 L

D. 1.5 L

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4

In a gusseted base, when the end of the column is machined for complete bearing on the base plate, then the axial load is assumed to be transferred to base plate

A. Fully by direct bearing

B. Fully through fastenings

C. 50% by direct bearing and 50% through fastenings

D. 75% by direct bearing and 25% through fastenings

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4

The ratio of the span L of the filler joists to the depth d from the underside of the joist to the top of the structural concrete, should not exceed

A. 60

B. 45

C. 35

D. 25

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4

The equivalent axial tensile load Pe, which produces an average axial tensile stress in the section equivalent to the combined stress due to axial tension P and bending M, at the extreme fibre of the section, is given by (where Z is the section modulus of the section).

A. Pe = P + MA/Z

B. Pe = P - MA/Z

C. Pe = P - Z/MA

D. Pe = P + Z/MA

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4

Generally the purlins are placed at the panel points so as to avoid

A. Axial force in rafter

B. Shear force in rafter

C. Deflection of rafter

D. Bending moment in rafter

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4

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

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4

Spans of continuous fillers are considered approximately equal if the longest span does not exceed the shortest span by more than

A. 5 %

B. 10 %

C. 15 %

D. 20 %

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4

Gantry girders are designed to resist

A. Lateral loads

B. Longitudinal loads and vertical loads

C. Lateral, longitudinal and vertical loads

D. Lateral and longitudinal loads

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4

Under a concentrated load, bearing stress fb in a beam is given by (where b is the length of the bearing plate and h is the depth of the root of the fillet).

A. fb = W/(b + h√3)tw

B. fb = W/(b + 2h√3)tw

C. fb = W/(b + 2h√2)tw

D. fb = W/(b + h√2)tw

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4

Maximum permissible slenderness ratio of a member normally acting as a tie in a roof truss, is

A. 180

B. 200

C. 250

D. 350

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4

A single angle in tension is connected by one leg only. If the areas of connecting and outstanding legs are respectively a and b, net effective area of the angle, is

A. a - [b/{1 + 0.35 (b/a)}]

B. a + [b/{1 + 0.35 (b/a)}]

C. a - [b/{1 + 0.2 (b/a)}]

D. a + [b/{1 + 0.2 (b/a)}]

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4

Bearing stiffener in a plate girder is used to

A. Transfer the load from the top flange to the bottom one

B. Prevent buckling of web

C. Decrease the effective depth of web

D. Prevent excessive deflection

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4

IS : 800 - 1971 recommends that in a splice plate the number of rivets carrying calculated shear stress through a packing greater than 6 mm thick, is to be increased by 2.5% for every

A. 1.00 mm thickness of packing

B. 1.50 mm thickness of packing

C. 2.0 mm thickness of packing

D. 2.50 mm thickness of packing

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4

The permissible bearing stress in steel, is

A. 1500 kg/cm2

B. 1890 kg/cm2

C. 2025 kg/cm2

D. 2340 kg/cm2

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4

Which of the following types of riveted joint is free from bending stresses?

A. Lap joint

B. Butt joint with single cover plate

C. Butt joint with double cover plates

D. None of the above

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4

According to the Unwin's formula, if t is thickness of the plate in mm, the nominal diameter of the rivet, is

A. d = 1.91 t

B. d = 1.91 t2

C. d = 1.91 √t

D. d = 1.91 t

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4

The centrifugal force due to curvature of track is assumed to act on the bridge at a height of

A. 1.23 m above the rail level

B. 1.50 m above the rail level

C. 1.83 m above the rail level

D. 2.13 m above the rail level

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4

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

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4

To the calculated area of cover plates of a built-up beam, an allowance for rivet holes to be added, is

A. 10 %

B. 13 %

C. 15 %

D. 18 %

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4

When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which (Where, Fa is the load shared by each rivet due to axial load and Fm is the shearing load due to moment in any rivet.)

A. Is at the maximum distance from CG of the rivet group

B. Is at the minimum distance from CG of the rivet group

C. Gives the maximum angle between the two forces Fa and Fm

D. Gives the minimum angle between the two forces Fa and Fm

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4

Pick up the incorrect statement from the following:

A. The nominal diameter of a rivet is its diameter before driving

B. The gross diameter of a rivet is the diameter of rivet hole

C. The gross area of a rivet is the cross-sectional area of the rivet hole

D. The diameter of a rivet hole is equal to the nominal diameter of the rivet plus 1.5 mm

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4

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