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This set of Design of Steel Structures Multiple Choice Questions & Answers (MCQs) focuses on Design Of Steel Structures Set 17
Q1 | For a cantilever beam of length continuous at the support and unrestrained against torsion at the support and free at the end, the effective length is equal to
- l = L
- l = 2L
- l = 0.5L
- l = 3L
Q2 | Pick up the correct statement from the following:
- When the gauge distance is larger than the pitch, the failure of the section may occur in a zig-zag line
- 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
- When the gauge distance and pitch are both equal, the failure to the section becomes more likely as the diameter of the holesincreases
- All the above
Q3 | If the thickness of plate to be connected by a rivet is 16 mm, then suitable sizeof rivet as per Unwin's formula will be
- 16 mm
- 20 mm
- 24 mm
- 27 mm
Q4 | Angle of inclination of the lacing bar with the longitudinal axis of the columnshould preferably be between
- 10° to 30°
- 30° to 40°
- 40° to 70°
- 90°
Q5 | The internal pressure coefficient on walls for buildings with large permeability istaken as
- ± 0.2
- ±0.5
- ± 0.7
Q6 | The centrifugal force due to curvature of track is assumed to act on the bridge at aheight of
- 1.23 m above the rail level
- 1.50 m above the rail level
- 1.83 m above the rail level
- 2.13 m above the rail level
Q7 | 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
- 0.67 L
- 0.8 L
- L
- 1.5 L
Q8 | 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
- t b × p)/6M]
- t M/(b × p)]
- t = 6M/bp
- t M/(b × p)
Q9 | Allowable working stress corresponding to the slenderness ratio of double angles placed back to back and connected to one side of a gusset plate, is reduced to
- 50 %
- 60 %
- 70 %
- 80 %
Q10 | The critical stress on a column for elastic buckling given by Euler's formula, is
- fc = ²E/(I/r)²
- fc = (I/r)²/
- fc = (I/r)/
- fc = ²E/(I/r)
Q11 | When a tension member is made of four angles with a plate as a web, the allowance for holes is made as
- Two holes for each angle and one hole for the web
- One hole for each angle and one hole for the web
- One hole for each angle and two holes for the web
- Two holes for each angle and two holes for theweb
Q12 | To keep the intensity of bearing pressure between the column base and concrete compressive and to vary from zero to 2P/BL, the ratio of the moment M to the axial load P should be
- L/2
- L/3
- L/4
- L/6
Q13 | The spans are considered approximately equal if the longest span does not exceed the shortest span by more than
- 5 %
- 10 %
- 15 %
- 20 %
Q14 | The mechanism method and the statical method give
- Lower and upper bounds respectively on the strength ofstructure
- Upper and lower bounds respectively on the strength ofstructure
- Lower bound on the strength ofstructure
- Upper bound on the strength of structure
Q15 | The maximum spacing of vertical stiffeners is (Where d is the distance between flange angles)
- 1.33 d
- 1.25 d
- 1.5 d
- 1.75 d
Q16 | 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
- 0
- 0.5
- Between 0.5 and 1.0
- 1.0
Q17 | The effective length of a double angle strut with angles placed back to back and connected to both the sides of a gusset plate, by not less than two rivets, is
- 0.5 L
- 0.67 L
- 0.85 L
- 2 L
Q18 | The range of economical spacing of trusses varies from
- L/3 to L/5
- L/4 to 2L/5
- L/3 to L/2
- 2L/5 to 3L/5, where L isspan
Q19 | The maximum slenderness ratio of a steel column, the design of which is governed by wind or seismic forces is
- 150
- 180
- 250
- 350
Q20 | The failure of a web plate takes place by yielding if the ratio of the clear depth to thickness of the web, is less than
- 45
- 55
- 62
- 82
Q21 | For steel members not exposed to weather, the thickness of steel should not be lessthan
- 4.5 mm
- 6 mm
- 8 mm
- 10 mm
Q22 | When a tension member consists of two channel sections, the allowance for rivet hole is made for two holes from
- Each web
- Each flange
- Each web or one hole from each flange whichever is more
- Each web or one hole from each flange whichever is less
Q23 | 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 - [b/{1 + 0.35 (b/a)}]
- a + [b/{1 + 0.35 (b/a)}]
- a - [b/{1 + 0.2 (b/a)}]
- a + [b/{1 + 0.2 (b/a)}]
Q24 | Secant formula for direct stress in compression, is applicable only for slendernessratio upto
- 120
- 130
- 140
- 150