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What is the correct answer?

4

The average shear stress for rolled steel beam section, is

A. 845 kg/cm2

B. 945 kg/cm2

C. 1025 kg/cm2

D. 1500 kg/cm2

Correct Answer :

B. 945 kg/cm2


Related Questions

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4

If p and d are pitch and gross diameter of rivets, the efficiency (η) of the riveted joint, is given by

A. η = p/p - d

B. η = p/p + d

C. η = p - d/p

D. η = p + d/p

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4

The greatest permissible clear dimension of the web of thickness t in the panel of a plate girder, is restricted to

A. 180 t

B. 220 t

C. 230 t

D. 270 t

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4

A second horizontal stiffener is always placed at the neutral axis of the girder if the thickness of the web is less than

A. d/250 for structural steel

B. d/225 for high tensile steel

C. Both (c) and (b)

D. Neither (a) nor (b)

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4

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

A. 45° and 45°

B. 30° and 60°

C. 40° and 50°

D. 20° and 70°

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4

Design of a riveted joint is based on the assumption:

A. Bending stress in rivets is accounted for

B. Riveted hole is assumed to be completely filled by the rivet

C. Stress in the plate in not uniform

D. Friction between plates is taken into account

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4

The allowable shear stress in the web of mild steel beams decreases with

A. Decrease in h/t ratio

B. Increase in h/t ratio

C. Decrease in thickness

D. Increase in height Where 'h' is height and t is thickness

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4

Number of rivets required in a joint, is

A. Load/Shear strength of a rivet

B. Load/Bearing strength of a rivet

C. Load/Tearing strength of a rivet

D. Load/Rivet value

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4

The economical depth d of a web plate in which allowable bearing stress is fb, and the maximum bending moment is M, as suggested by Rawater and Clark, is

A. d = (M/fb)

B. d = 1.5 (M/fb)

C. d = 2.5 (M/fb)

D. d = 4.5 (M/fb)

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4

A column splice is used to increase

A. Length of the column

B. Strength of the column

C. Cross-sectional area of the column

D. None of these

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4

Economical depth of a plate girder corresponds to

A. Minimum weight

B. Minimum depth

C. Maximum weight

D. Minimum thickness of web

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4

In double lacing, the thickness t of flat lacing is

A. t < 1/40 th length between inner end rivets

B. t < 1/50 th length between inner end rivets

C. t < 1/60 th length between inner end rivets

D. t < 1/70 th length between inner end rivets

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4

The bracing provided in the plane of end posts is called

A. Sway bracing

B. Portal bracing

C. Top lateral bracing

D. Bottom lateral bracing

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4

In the cross-section of a weld, throat is the

A. Minimum dimension

B. Average dimension

C. Maximum dimension

D. None of the above

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4

A compression member consisting of angle sections may be a

A. Continuous member

B. Discontinuous single angle strut

C. Discontinuous double angle strut

D. All the above

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4

For a standard 45° fillet, the ratio of size of fillet to throat thickness is

A. 1 : 1

B. 1 : √2

C. √2 : 1

D. 2 : 1

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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

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4

When the axis of load lies in the plane of rivet group, then the rivets are subjected to

A. Only shear stresses

B. Only tensile stresses

C. Both (A) and (B)

D. None of the above

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4

With usual notations of the letters, the shear stress fs at any point of the cross-section is given by

A. fs =FQ/It

B. fs =Ft/IQ

C. fs =It/FQ

D. fs =IF/Qt

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4

If a pair of angles placed back to back in tension are connected by one leg of each angle, the net effective area of the section, 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

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

The use of tie plates in laced columns is

A. Prohibited

B. Not prohibited

C. Permitted at start and end of lacing system only

D. Permitted between two parts of the lacing

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4

Net sectional area of a tension member, is equal to its gross section area

A. Plus the area of the rivet holes

B. Divided by the area of rivet holes

C. Multiplied by the area of the rivet holes

D. None of these

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4

For a steel grillage footing to support two unequal column loads

A. Line of action of the resultant of two column loads, is made to coincide with the centre of gravity of the base of the footing

B. Trapezoidal shape is used for the base footing

C. Projections of beams on either side in lower tier are such that bending moments under columns are equal

D. All the above

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4

In case horizontal stiffeners are not used, the distance between vertical legs of flange angles at the top and bottom 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

Column footing is provided

A. To spread the column load over a larger area

B. To ensure that intensity of bearing pressure between the column footing and soil does not exceed permissible bearing capacity of the soil

C. To distribute the column load over soil through the column footing

D. All the above

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4

The safe working pressure for a spherical vessel 1.5 m diameter and having 1.5 cm thick wall not to exceed tensile stress 50kg/cm2, is

A. 16 kg/cm2

B. 18 kg/cm2

C. 20 kg/cm2

D. 22 kg/cm2

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4

Efficiency of a riveted joint is defined as the ratio of

A. Least strength of a riveted joint to the strength of solid plate

B. Greatest strength of a riveted joint to the strength of solid plate

C. Least strength of a riveted plate to the greatest strength of the riveted joint

D. All the above

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4

The greatest gauge of long rivets should not exceed (where d is the diameter of the holes).

A. 2 d

B. 4 d

C. 6 d

D. 8 d

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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

Intermediate vertical stiffeners in a plate girder need be provided if the depth of web exceeds

A. 50 t

B. 85 t

C. 200 t

D. 250 t Where t is thickness of web