Design Of Steel Structures Set 14

Civil Engineering

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This set of Design of Steel Structures Multiple Choice Questions & Answers (MCQs) focuses on Design Of Steel Structures Set 14

Q1 | The diameter of base of conical flare of a steel stack is ( d is the diameter of the cylindrical part)
  • Less than d
  • Equal to d
  • More than d
  • Any of the above
Answer: More than d
Q2 | The effective length of a compression member of length L held in position and restrained in direction at one end and effectively restrained in direction but not held in position at the other end, is
  • L
  • 0.67 L
  • 0.85 L
  • 1.5 L
Answer: L
Q3 | Working shear stress on the gross area of a rivet as recommended by IndianStandards, is
  • 785 kg/cm2
  • 1025 kg/cm2
  • 2360 kg/cm2
  • None of these
Answer: 1025 kg/cm2
Q4 | The critical load for a column of length I hinged at both ends and having flexural rigidity El, is given by
  • Pc = ²EI/l²
  • Pc = /l²
  • Pc = /I²
  • None of these
Answer: Pc = ²EI/l²
Q5 | Length of an outstanding leg of a vertical stiffener, may be taken equal to
  • 1/10th of clear depth of the girder plus 15mm
  • 1/20th of clear depth of the girder plus 20mm
  • 1/25th of clear depth of the girder plus 25mm
  • 1/30th of clear depth of the girder plus 50mm
Answer: 1/25th of clear depth of the girder plus 25mm
Q6 | 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
  • d = (M/fb)
  • d = 1.5 (M/fb)
  • d = 2.5 (M/fb)
  • d = 4.5 (M/fb)
Answer: d = 4.5 (M/fb)
Q7 | Minimum pitch of the rivets shall not be less than (Where d is gross diameter of rivet)
  • 1.5 d
  • 2.0 d
  • 2.5 d
  • 3.0 d
Answer: 2.5 d
Q8 | For steel members exposed to weather and not accessible for repainting, thethickness of steel should not be less than
  • 4.5 mm
  • 6 mm
  • 8 mm
  • 10 mm
Answer: 8 mm
Q9 | The slenderness ratio of a column supported throughout its length by a masonrywall is
  • Zero
  • 10
  • 100
  • Infinity
Answer: Zero
Q10 | Outstanding length of a compression member consisting of a channel, is measuredas
  • Half of the nominal width
  • Nominal width of the section
  • From the edge to the first row ofrivets
  • None of these
Answer: Nominal width of the section
Q11 | The side thrust T on the tie rods provided at the end beam of jack arch of rise R,is calculated from the formula
  • T = WL/4R
  • T = WR/8L
  • T = WL/8R
  • T = WL/2R
Answer: T = WL/8R
Q12 | Intermediate vertical stiffeners in a plate girder need be provided if the depth ofweb exceeds
  • 50 t
  • 85 t
  • 200 t
  • 250 tt
Answer: 85 t
Q13 | For the buildings having a low permeability, the internal wind pressure acting normal to the wall and roof surfaces is taken as (Where p is basic wind pressure)
  • Zero
  • ±0.2 p
  • ± 0.5 p
  • ±0.7 p
Answer: ±0.2 p
Q14 | If is the maximum allowable bending stress in a tension member whose radius of gyration is and depth is 2y, the required cross sectional area is given by
  • A = My/fr²
  • A = My²/fr²
  • A = My/fr
  • A = My/f²r²
Answer: A = My/fr²
Q15 | The load on a lintel is assumed as uniformly distributed if the height of themasonry above it, is upto a height of
  • The effective span
  • 1.25 times the effective span
  • 1.50 times the effective span
  • 2.0 times the effective span
Answer: 1.25 times the effective span
Q16 | Maximum pitch of rivets, used in steel stacks, is limited to
  • 6 t
  • 10 t
  • 12 t
  • 16 t t
Answer: 10 t
Q17 | According to IS: 800-1962, the coefficient of expansion of steel per degreecentigrade per unit length, is taken as
  • 0.000008
  • 0.000010
  • 0.000012
  • 0.000014
Answer: 0.000012
Q18 | 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
  • (D²/250) × (R/W)
  • (D3T/250) × (R/W)
  • (DT/250) × (R/W)
  • (DT/250) × (W/R)
Answer: (D3T/250) × (R/W)
Q19 | As per IS: 800, in the plastic design, which of the following pairs are correctly matched? Working Loads Load factor(i) Dead load 1.7(ii) Dead Load + imposed load 1.7(iii) Dead load + load due to wind or 1.3 seismic forces(iv) Dead load + imposed load + load 1.7 due to wind or seismic forces Of these statements
  • (i) and (ii) are correct
  • (i), (ii) and (iii) are correct
  • (ii) and (iii) are correct
  • Only (i) is correct
Answer: (i) and (ii) are correct
Q20 | Effective length of a column effectively held in position and restrained in direction atboth ends, is
  • L
  • 0.67 L
  • 0.85 L
  • 1.5 L
Answer: 0.67 L
Q21 | Pick up the correct statement from the following:
  • The ends of a strut, are connected together with two rivets
  • The members of strut will have at least two connections spaced equidistant in theirlength
  • The members when separated back-to-back, the connecting rivets should pass through solid washer or packing
  • All the above
Answer: All the above
Q22 | Effective length of a column effectively held in position and restrained in direction at one end but neither held in position nor restrained in direction at the other end, is
  • 1.5 L
  • 0.67 L
  • 0.85 L
  • 2 L
Answer: 2 L
Q23 | If the thickness of thinnest outside plate is 10 mm, then the maximum pitch ofrivets in tension will be taken as
  • 120 mm
  • 160 mm
  • 200 mm
  • 300 mm
Answer: 160 mm
Q24 | 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
  • Unstiffened seated connection
  • Stiffened seated connection
  • Seated connection
  • None of these
Answer: Seated connection
Q25 | The effective length of a battened strut effectively held in position at both ends but not restrained in direction is taken as
  • 1.8 LL
  • 1.1 L
  • 1.5 L
  • .none
Answer: 1.5 L
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