# 440+ Design of Steel Structures Solved MCQs

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56.8k
301.

A. L
B. 0.67 L
C. 0.85 L
D. 1.5 L
302.

A. 0.65 kN/m²
B. 0.75 kN/m²
C. 1.35 kN/m²
D. 1.50 kN/m²
303.

D. None of these
304.

## If N is the number of rivets in the joint, the strength of a riveted joint against shearing of rivets, is given by

A. Ps = N d2 × Ps
B. Ps = N × (d × t × ps)
C. Ps = N × (p - d) × t × Ps
D. Ps = N × (P + d) × t × ps
Answer» A. Ps = N d2 × Ps
305.

## The sway bracing is designed to transfer

A. 2Vi % of the top panel wind load to bottom bracing
B. 10% of the top panel wind load to bottombracing
C. 25% of the top panel wind load to bottombracing
D. 50% of the top panel wind load to bottom bracing
Answer» D. 50% of the top panel wind load to bottom bracing
306.

## Column footing is provided

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
307.

## Rolled steel beams are designated by Indian Standard series and its

A. Weight per metre and depth of itssection
B. Depth of section and weight per metre
C. Width of flange and weight per metre
D. Weight per metre and flange width
Answer» B. Depth of section and weight per metre
308.

A. 8 t
B. 16 t
C. 24 t
D. 32 t
309.

## For a compression member with double angle section, which of the following section will give larger value of minimum radius of gyration?

A. Equal angles back to back
B. Unequal legged angles with long legs back to back
C. Unequal legged angles with short legs back to back
D. Both (B) and (C)
Answer» B. Unequal legged angles with long legs back to back
310.

## Pick up the correct statement from the following:

A. The minimum pitch should not be less than 2.5 times the gross diameter of the river
B. The minimum pitch should not be less than 12 times the gross diameter of therivet
C. The maximum pitch should not exceed 10 times the thickness or 150 mm whichever is less in compression
D. All the above
Answer» A. The minimum pitch should not be less than 2.5 times the gross diameter of the river
311.

A. 500 mm
B. 600 mm
C. 1000 mm
D. 300 mm
312.

## 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 momentsunder columns are equal
D. All the above
313.

## In a tension member if one or more than one rivet holes are off the line, the failure of the member depends upon:

A. Pitch
B. Gauge
C. Diameter of the rivet holes
D. All the above
314.

A. L
B. 0.67 L
C. 0.85 L
D. 1.5 L
315.

## By providing sufficient edge distance, which of the following failures of riveted joint can be avoided?

A. Tension failure of the plate
B. Shear failure of the rivet
C. Shear failure of the plate
D. Crushing failure of the rivet
Answer» C. Shear failure of the plate
316.

A. 1500 kg/cm2
B. 1420 kg/cm2
C. 1650 kg/cm2
D. 2285 kg/cm2
317.

## When the ratio of the moment M to axial load P is greater than L/6, the resultant of the compressive bearing pressure which acts at a distance Y from one side, is given by

A. y = (L/3) - (M/P)
B. y = (L/2) - (P/M)
C. y = (L/2) + (M/P)
D. y = (L/3) + (M/P)
Answer» B. y = (L/2) - (P/M)
318.

A. 16 kg/cm2
B. 18 kg/cm2
C. 20 kg/cm2
D. 22 kg/cm2
319.

## Battening is preferable when the (i) Column carries axial load only (ii) Space between the two main components is not very large (iii) Column is eccentrically loaded The correct answer is

A. Only (i)
B. Only (iii)
C. (i) and (ii)
D. (ii) and (iii)
320.

## For a steel member of slenderness ratio 350, the allowable stress is 76 kg/cm2 if it is

A. HTW grade of thickness exceeding 32 mm
B. HT grade of thickness exceeding 45 mm
C. HT grade of thickness not exceeding 45 mm
D. All the above
321.

## Bearing stiffener in a plate girder is used to

A. Transfer the load from the top flange to the bottomone
B. Prevent buckling of web
C. Decrease the effective depth of web
D. Prevent excessive deflection
Answer» B. Prevent buckling of web
322.

A. WL3/3EI
B. WL4/3EI
C. WL3/48EI
D. 5WL4/384EI
323.

## If d is the distance between the flange angles,

A. Vertical stiffeners are provided in steel plate girders if the web is less thand/85
B. Vertical stiffeners are provided in high tensile steel plate girders if the web is lessthan d/175
C. Horizontal stiffeners are provided in steel plate girders if the web is less thand/200
D. All the above
324.

## 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
325.

## Pick up the correct statement from the following:

A. The steel beams placed in plain cement concrete, are known as reinforcedbeams
B. The filler joists are generally continuous over three-supports only
C. Continuous fillers are connected to main beams by means of cleat angles
D. Continuous fillers are supported by main steelbeams
Answer» D. Continuous fillers are supported by main steelbeams
326.

## The diameter of base of conical flare of a steel stack is ( d is the diameter of the cylindrical part)

A. Less than d
B. Equal to d
C. More than d
D. Any of the above
327.

A. L
B. 0.67 L
C. 0.85 L
D. 1.5 L
328.

A. 785 kg/cm2
B. 1025 kg/cm2
C. 2360 kg/cm2
D. None of these
329.

A. Pc = ²EI/l²
B. Pc = /l²
C. Pc = /I²
D. None of these
330.

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

A. 1/10th of clear depth of the girder plus 15mm
B. 1/20th of clear depth of the girder plus 20mm
C. 1/25th of clear depth of the girder plus 25mm
D. 1/30th of clear depth of the girder plus 50mm
Answer» C. 1/25th of clear depth of the girder plus 25mm
331.

## 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)
Answer» D. d = 4.5 (M/fb)
332.

A. 1.5 d
B. 2.0 d
C. 2.5 d
D. 3.0 d
333.

A. 4.5 mm
B. 6 mm
C. 8 mm
D. 10 mm
334.

A. Zero
B. 10
C. 100
D. Infinity
335.

## Outstanding length of a compression member consisting of a channel, is measured as

A. Half of the nominal width
B. Nominal width of the section
C. From the edge to the first row ofrivets
D. None of these
Answer» B. Nominal width of the section
336.

A. T = WL/4R
B. T = WR/8L
C. T = WL/8R
D. T = WL/2R
337.

A. 50 t
B. 85 t
C. 200 t
D. 250 tt
338.

A. Zero
B. ±0.2 p
C. ± 0.5 p
D. ±0.7 p
339.

A. A = My/fr²
B. A = My²/fr²
C. A = My/fr
D. A = My/f²r²
340.

## The load on a lintel is assumed as uniformly distributed if the height of the masonry above it, is upto a height of

A. The effective span
B. 1.25 times the effective span
C. 1.50 times the effective span
D. 2.0 times the effective span
Answer» B. 1.25 times the effective span
341.

A. 6 t
B. 10 t
C. 12 t
D. 16 t t
342.

A. 0.000008
B. 0.000010
C. 0.000012
D. 0.000014
343.

## If R is the reaction on the bearing plate, the minimum moment of. inertia of the bearing stiffener provided at the support of a plate girder of overall depth D, the maximum thickness of the compression flange T, carrying total load W, is

A. (D²/250) × (R/W)
B. (D3T/250) × (R/W)
C. (DT/250) × (R/W)
D. (DT/250) × (W/R)
344.

A. (i) and (ii) are correct
B. (i), (ii) and (iii) are correct
C. (ii) and (iii) are correct
D. Only (i) is correct
Answer» A. (i) and (ii) are correct
345.

A. L
B. 0.67 L
C. 0.85 L
D. 1.5 L
346.

## Pick up the correct statement from the following:

A. The ends of a strut, are connected together with two rivets
B. The members of strut will have at least two connections spaced equidistant in theirlength
C. The members when separated back-to-back, the connecting rivets should pass through solid washer or packing
D. All the above
347.

A. 1.5 L
B. 0.67 L
C. 0.85 L
D. 2 L
348.

A. 120 mm
B. 160 mm
C. 200 mm
D. 300 mm
349.

## The connection of one beam to another beam by means of an angle at the bottom and an angle at the top, is known as

A. Unstiffened seated connection
B. Stiffened seated connection
C. Seated connection
D. None of these
350.

A. 1.8 LL
B. 1.1 L
C. 1.5 L
D. .none
351.

## The method of design of steel framework for greatest rigidity and economy in weight, is known as

A. Simply design
B. Semi-rigid design
C. Fully rigid design
D. None of these
352.

## For a cantilever beam of length built-in at the support and restrained against torsion at the free end, the effective projecting length is

A. l = 0.7 L
B. l = 0.75 L
C. l = 0.85 L
D. l = 0.5 L
Answer» B. l = 0.75 L
353.

A. 150 t
B. 160 t
C. 170 t
D. 180 t
354.

## Bearing stiffeners are provided at (i) The supports (ii) The mid span (iii) The point of application of concentrated loads The correct answer is

A. Only (i)
B. Both (i) and (ii)
C. Both (i) and (iii)
D. (i), (ii) and (iii)
Answer» C. Both (i) and (iii)
355.

## Pick up the correct statement from the following:

A. The slenderness ratio of lacing bars for compression members should not exceed145
B. The minimum width of lacing bar connected with rivets of nominal diameter 16 mm, is kept 50 mm
C. The minimum thickness of a flat lacing bar is kept equal to one-fortieth of its length between inner end rivets
D. All the above
356.

A. d
B. 1.25 d
C. 1.5 d
D. 1.75 d
357.

## If d is the distance between the flange angles of a plate girder, vertical stiffeners are provided at a distance not greater than

A. d but not less than 0.20 d
B. 1.25 d but not less than 0.33 d
C. 1.5 d but not less than 0.33 d
D. 2.0 d but not less than 0.50 d
Answer» B. 1.25 d but not less than 0.33 d
358.

## 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)
Answer» C. Both (c) and (b)
359.

A. 26,000 kg
B. 26,025 kg
C. 26,050 kg
D. 26,075 kg
360.

## The effect of racking forces is considered in the design of (i) Lateral braces (ii) Chord members The correct answer is

A. Only (i)
B. Only (ii)
C. Both (i) and (ii)
D. None of the above
361.

A. L
B. L
C. ½ L
D. 2L
362.

A. 180
B. 200
C. 300
D. 350
363.

## Pick up the correct statement from the following:

A. Tacking rivets are used if the minimum distance between centres of two adjacent rivets exceeds 12 t or 200 mm, whichever isless
B. Tacking rivets are not considered to calculate stress
C. Tacking rivets are provided throughout the length of a compression member composed of two components back to back
D. All the above
364.

## 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 tw
B. fb = W/(b + 2h tw
C. fb = W/(b + 2h tw
D. fb = W/(b + h tw
Answer» B. fb = W/(b + 2h tw
365.

## For double angles carrying tension, placed back to back and connected to either side of the gusset plate, the sectional area of the section, is equal to cross sectional area of

A. The section
B. The section plus area of rivet holes
C. The section minus area of rivet holes
D. The section multiplied by the area of the rivet hole
Answer» C. The section minus area of rivet holes
366.

A. fbt² + fc²)
B. fbt² + ½fc²)
C. fbt² + 3fc²)
D. fbt² - 3fc²)
367.

## When a large value of radius of gyration is not requiredChannels are placed back to back

A. Channel flanges are kept inward
B. Channel flanges are kept outward
C. None of these
D. all
Answer» B. Channel flanges are kept outward
368.

A. 5 mm
B. 6 mm
C. 8 mm
D. 10 mm
369.

A. 0.15 d
B. 0.22 d
C. 0.33 d
D. 0.44 d
370.

A. 1
B. 2
C. 3
D. 4
371.

A. Stringers
B. Trimmers
C. Girts
D. Lintels
372.

## A structural member subjected to tensile force in a direction parallel to its longitudinal axis, is generally known as

A. A tie
B. A tie member
C. A tension member
D. All the above
373.

## According to the Unwin's formula, if 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
Answer» C. d = 1.91 t
374.

A. 10 tonnes
B. 12 tonnes
C. 15 tonnes
D. 18 tonnes
375.

A. 4.5 mm
B. 6 mm
C. 8 mm
D. 10 mm
376.

## For determination of allowable stress in axial compression, Indian Standard Institution has adopted

A. Euler's formula
B. Rankine formula
C. Perry Robertson formula
D. Secant formula
377.

## When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which 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
Answer» D. Gives the minimum angle between the two forces Fa and Fm
378.

A. 2 t
B. 4 t
C. 6 t
D. 8 t
379.

A. d/4
B. d/3
C. d/2
D. 2d/3
380.

## The rolled steel I-sections are most commonly used as beams because these provide

A. Large moment of inertia with less cross-sectional area
B. Large moment of resistance as compared to othersection
C. Greater lateral stability
D. All the above
381.

A. P = K/v2
B. v = K/P2
C. P = Kv2
D. P = Kv
382.

A. 4 zones
B. 5 zones
C. 6 zones
D. 7 zones
383.

## Study the following statements. (i) Top lateral bracing prevents the sides-way buckling of the chord. (ii) Sway bracing keeps the rectangular shape of the bridge cross-section. (iii) Sway bracing transfers the load from top of end posts to bearings. The correct answer is

A. Only (i)
B. Both (i) and (ii)
C. Both (i) and (iii)
D. All (i), (ii) and (iii)
Answer» B. Both (i) and (ii)
384.

A. 2 d
B. 4 d
C. 6 d
D. 8 d
385.

A. 1.5
B. 1.7
C. 2.0
D. all
386.

A. 1 cm
B. 1.5 cm
C. 2 cm
D. 2.5 cm
387.

## The beams supporting the steps of a stair are generally known as Headers

A. Trimmers
B. Stringers
C. Spandrel beams
D. none
388.

A. fs =FQ/It
B. fs =Ft/IQ
C. fs =It/FQ
D. fs =IF/Qt
389.

A. M = WL/100
B. M = WL/200
C. M = WL/300
D. M = WL/400
390.

A. 180
B. 200
C. 250
D. 350
391.

A. 1650 litre
B. 1950 litre
C. 2450 litre
D. none
392.

A. 2
B. 4
C. 6
D. 8
393.

A. 6
B. 8
C. 10
D. 15
394.

A. 1.0 mm
B. 1.5 mm
C. 2.0 mm
D. 2.5 mm
395.

## Pick up the correct statement from the following:

A. Vertical stiffeners may be placed in pairs one on each side of the web
B. Single vertical stiffeners may be placed alternately on opposite sides of the web
C. Horizontal stiffeners may be placed alternately on opposite sides of theweb
D. All the above
396.

A. 180 t
B. 220 t
C. 230 t
D. 270 t
397.

A. 180
B. 200
C. 250
D. 350
398.

A. L
B. 0.67 L
C. 0.85 L
D. 1.5 L
399.

A. 12 t
B. 16 t
C. 20 t
D. 25 tt
400.

A. 60
B. 70
C. 80
D. 100