# 440+ Design of Steel Structures Solved MCQs

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54.5k
401.

A. l = L
B. l = 2L
C. l = 0.5L
D. l = 3L
402.

## Pick up the correct statement from the following:

A. When the gauge distance is larger than the pitch, the failure of the section may occur in a zig-zag line
B. When the gauge distance is smaller than the pitch, the failure of the section may occur in a straight right angle section through the centre of rivet holes
C. When the gauge distance and pitch are both equal, the failure to the section becomes more likely as the diameter of the holesincreases
D. All the above
403.

A. 16 mm
B. 20 mm
C. 24 mm
D. 27 mm
404.

A. 10° to 30°
B. 30° to 40°
C. 40° to 70°
D. 90°
405.

A. ± 0.2
B. ±0.5
C. ± 0.7
D. 0
406.

## 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
Answer» C. 1.83 m above the rail level
407.

A. 0.67 L
B. 0.8 L
C. L
D. 1.5 L
408.

## If M is the moment due to a couple in a bearing plate whose width is b and allowable bending stress is P, the thickness (t) of the bending plate of the column splice, is

A. t b × p)/6M]
B. t M/(b × p)]
C. t = 6M/bp
D. t M/(b × p)
Answer» B. t M/(b × p)]
409.

A. 50 %
B. 60 %
C. 70 %
D. 80 %
410.

## The critical stress on a column for elastic buckling given by Euler's formula, is

A. fc = ²E/(I/r)²
B. fc = (I/r)²/
C. fc = (I/r)/
D. fc = ²E/(I/r)
411.

## When a tension member is made of four angles with a plate as a web, the allowance for holes is made as

A. Two holes for each angle and one hole for the web
B. One hole for each angle and one hole for the web
C. One hole for each angle and two holes for the web
D. Two holes for each angle and two holes for theweb
Answer» C. One hole for each angle and two holes for the web
412.

A. L/2
B. L/3
C. L/4
D. L/6
413.

A. 5 %
B. 10 %
C. 15 %
D. 20 %
414.

## The mechanism method and the statical method give

A. Lower and upper bounds respectively on the strength ofstructure
B. Upper and lower bounds respectively on the strength ofstructure
C. Lower bound on the strength ofstructure
D. Upper bound on the strength of structure
Answer» B. Upper and lower bounds respectively on the strength ofstructure
415.

A. 1.33 d
B. 1.25 d
C. 1.5 d
D. 1.75 d
416.

## If the loaded length of span in meters of a railway steel bridge carrying a single track is 6 m, then impact factor is taken as

A. 0
B. 0.5
C. Between 0.5 and 1.0
D. 1.0
Answer» C. Between 0.5 and 1.0
417.

A. 0.5 L
B. 0.67 L
C. 0.85 L
D. 2 L
418.

## The range of economical spacing of trusses varies from

A. L/3 to L/5
B. L/4 to 2L/5
C. L/3 to L/2
D. 2L/5 to 3L/5, where L isspan
419.

A. 150
B. 180
C. 250
D. 350
420.

A. 45
B. 55
C. 62
D. 82
421.

A. 4.5 mm
B. 6 mm
C. 8 mm
D. 10 mm
422.

## When a tension member consists of two channel sections, the allowance for rivet hole is made for two holes from

A. Each web
B. Each flange
C. Each web or one hole from each flange whichever is more
D. Each web or one hole from each flange whichever is less
Answer» D. Each web or one hole from each flange whichever is less
423.

## 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)}]
Answer» D. a + [b/{1 + 0.2 (b/a)}]
424.

A. 120
B. 130
C. 140
D. 150
425.

A. t
B. t
C. t = 21/64
D. t = 64/21
426.

## 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
Answer» C. 2.0 mm thickness of packing
427.

A. 10 %
B. 13 %
C. 15 %
D. 18 %
428.

A. r = I/A
B. r I/A)
C. r = (I/A)
D. r A/I)
429.

A. Column
B. Stanchion
C. Post
D. All the above
430.

## 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
Answer» A. Pe = P + MA/Z
431.

A. 4 mm
B. 6 mm
C. 8 mm
D. 10 mm
432.

## The distance measured along one rivet line from the centre of a rivet to the centre of adjoining rivet on an adjacent parallel rivet line, is called

A. Pitch of rivet
B. Gauge distance of rivet
C. Staggered pitch
D. All the above
433.

## The effective length of a simply supported beam with ends restrained against torsion, and also the ends of compression flange partially restrained against lateral bending, is given by

A. L = span
B. L = 0.85 span
C. L = 0.75 span
D. L = 0.7 span
Answer» B. L = 0.85 span
434.

A. 10
B. 11
C. 12
D. 13
435.

A. < 19
B. < 24
C. > 19
D. > 24
436.

## When a load is transferred through one surface to another surface in contact, the stress is known as

A. Tensile stress
B. Compressive stress
C. Shearing stress
D. None of these
437.

## A 20 mm dia steel bar which is subjected to an axial tension of 2300 kg/cm2 produces a strain of cm. If Young's modulus of steel is 2.1 × 106kg/cm2, the bar is

A. In the elastic range
B. In the plastic range
C. At yield point
D. None of these
Answer» A. In the elastic range
438.

D. All the above
439.

A. 5 %
B. 10 %
C. 15 %
D. 20 %
440.

A. 60
B. 45
C. 35
D. 25
441.

A. 10 mm
B. 12 mm
C. 15 mm
D. 20 mm
442.

A. 180
B. 200
C. 250
D. 350
443.

## Tacking rivets in compression plates not exposed to the weather, have a pitch not exceeding 300 mm or

A. 16 times the thickness of outside plate
B. 24 times the thickness of outside plate
C. 32 times the thickness of outside plate
D. 36 times the thickness of outside plate
Answer» C. 32 times the thickness of outside plate
444.

## 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)}]
Answer» B. a + [b/{1 + 0.35 (b/a)}]
445.