Design of Steel Structures 1000+ MCQ with answer for SSC MTS

1. 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
Answer : B

2. 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

3. 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
Answer : B

4. As per ISI, rolled steel beam sections are classified into
A. Two series
B. Three series
C. Four series
D. Five series
Answer : D

5. The minimum thickness of a steel plate, which is directly exposed to weather and is not accessible for cleaning and repainting, should be:
A. 4.5 mm
B. 6 mm
C. 8 mm
D. 10 mm
Answer : C

6. Pick up the correct statement from the following:
A. Loaded columns are supported on column bases
B. Column bases transmit the column load to the concrete foundation
C. Column load is spread over a large area on concrete
D. All the above
Answer : D

7. Rise of a Jack arch is kept about
A. 1/2 to 1/3 of the span
B. 1/3 to 1/4 of the span
C. 1/4 to 1/8 of the span
D. 1/8 to 1/12 of the span
Answer : D

8. Gantry girders are designed to resist
A. Lateral loads
B. Longitudinal loads and vertical loads
C. Lateral, longitudinal and vertical loads
D. Lateral and longitudinal loads
Answer : C

9. Horizontal stiffener in a plate girder is provided to safeguard against
A. Shear buckling of web plate
B. Compression buckling of web plate
C. Yielding
D. All of the above
Answer : B

10. Shape factor is a property which depends
A. Only on the ultimate stress of the material
B. Only on the yield stress of the material
C. Only on the geometry of the section
D. Both on the yield stress and ultimate stress of material
Answer : C

11. The capacity of the smallest pressed steel tank is
A. 1000 litre
B. 1650 litre
C. 1950 litre
D. 2450 litre
Answer : C

12. If the floor is supported at or near the bottom but top chords of a bridge is not braced, then the bridge is called
A. Deck type
B. Through type
C. Half through type
D. Double deck type
Answer : C

13. Under a concentrated load, bearing stress f_b 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. f_b = W/(b + h?3)t_w
B. f_b = W/(b + 2h?3)t_w
C. f_b = W/(b + 2h?2)t_w
D. f_b = W/(b + h?2)t_w
Answer : B

14. The basic wind speed is specified at a height 'h' above mean ground level in an open terrain. The value of 'h' is
A. 10 m
B. 20 m
C. 25 m
D. 50 m
Answer : A

15. If f is the maximum allowable bending stress in a tension member whose radius of gyration is r and depth is 2y, the required cross sectional area A is given by
A. A = My/fr²
B. A = My²/fr²
C. A = My/fr
D. A = My/f²r²
Answer : A

16. Pick up the correct statement from the following:
A. The steel beams placed in plain cement concrete, are known as reinforced beams
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 steel beams
Answer : D

17. A riveted joint may experience
A. Shear failure
B. Shear failure of plates
C. Bearing failure
D. All the above
Answer : D

18. If the 20 mm rivets are used in lacing bars, then the minimum width of lacing bar should be
A. 40 mm
B. 60 mm
C. 80 mm
D. 100 mm
Answer : B

19. The ratio of the span L of the filler joists to the depth d from the underside of the joist to the top of the structural concrete, should not exceed
A. 60
B. 45
C. 35
D. 25
Answer : C

20. The beam outside a wall upto floor level above it, is known as
A. Rafter
B. Purlin
C. Spandrel beam
D. Lintel
Answer : C

21. The effective length of a battened column is increased by
A. 5 %
B. 10 %
C. 15 %
D. 20 %
Answer : B

22. Maximum pitch f rivets, used in steel stacks, is limited to
A. 6 t
B. 10 t
C. 12 t
D. 16 t Where t is thickness of thinner plate being connected
Answer : B

23. 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 is span
Answer : A

24. If the thickness of thinnest outside plate is 10 mm, then the maximum pitch of rivets in tension will be taken as
A. 120 mm
B. 160 mm
C. 200 mm
D. 300 mm
Answer : B

25. 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

26. If the thickness of a structural member is small as compared to its length and width, it is classified as
A. One dimensional
B. Two dimensional
C. Three dimensional
D. None of these
Answer : B

27. The beams supporting the steps of a stair are generally known as
A. Headers
B. Trimmers
C. Stringers
D. Spandrel beams
Answer : C

28. The effective length of a weld, is taken as the actual length
A. Minus the size of weld
B. Minus twice the size of weld
C. Plus the size of weld
D. Plus twice the size of weld
Answer : B

29. If d is the distance between the flange angles, the vertical stiffeners in plate girders are spaced not greater than
A. d
B. 1.25 d
C. 1.5 d
D. 1.75 d
Answer : C

30. Which of the following types of riveted joint is free from bending stresses?
A. Lap joint
B. Butt joint with single cover plate
C. Butt joint with double cover plates
D. None of the above
Answer : C

31. 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
Answer : C

32. The rivets which are heated and then driven in the field, are known
A. Power driven shop rivets
B. Power driven field rivets
C. Hand driven rivets
D. Cold driven rivets
Answer : B

33. Lug angles
A. Are used to reduce the length of connection
B. Are unequal angles
C. Increases shear lag
D. All the above
Answer : A

34. Lug angle is
A. Used with single angle member
B. Not used with double angle member
C. Used with channel member
D. All the above
Answer : D

35. Pick up the incorrect statement from the following:
A. The nominal diameter of a rivet is its diameter before driving
B. The gross diameter of a rivet is the diameter of rivet hole
C. The gross area of a rivet is the cross-sectional area of the rivet hole
D. The diameter of a rivet hole is equal to the nominal diameter of the rivet plus 1.5 mm
Answer : D

36. 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

37. The maximum spacing of vertical stiffeners is
A. 1.33 d
B. 1.25 d
C. 1.5 d
D. 1.75 d Where d is the distance between flange angles
Answer : C

38. The bending moment for filler joists at the middle of an intermediate span, is
A. WL²/10
B. - WL²/10
C. - WL²/12
D. WL²/12
Answer : D

39. 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

40. The Indian standard code which deals with steel structures, is
A. IS : 875
B. IS : 800
C. IS : 456
D. IS : 1893
Answer : B

41. For the buildings having a low permeability, the internal wind pressure acting normal to the wall and roof surfaces is taken as
A. Zero
B. ±0.2 p
C. ± 0.5 p
D. ±0.7 p Where p is basic wind pressure
Answer : B

42. 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

43. 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 thlength between inner end rivets
D. t < 1/70 th length between inner end rivets
Answer : C

44. The web crippling due to excessive bearing stress can be avoided by
A. Increasing the web thickness
B. Providing suitable stiffener
C. Increasing the length of the bearing plates
D. None of the above
Answer : C

45. For a column of height L fixed in position and direction both at its top and bottom, its effective length, is
A. L
B. 1/?2 × L
C. ½ L
D. 2L
Answer : C

46. For the steel member exposed to weather and accessible for repainting, the thickness of steel should not be less than (accepting the webs of Indian Standard rolled steel joists and channels).
A. 4 mm
B. 6 mm
C. 8 mm
D. 10 mm
Answer : B

47. An imaginary line along which rivets are placed, is known as
A. Rivet line
B. Back line
C. Gauge line
D. All the above
Answer : D

48. 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
A. 0.5 L
B. 0.67 L
C. 0.85 L
D. 2 L
Answer : C

49. Diameter of a rivet hole is made larger than the diameter of the rivet by
A. 1.0 mm for rivet diameter upto 12 mm
B. 1.5 mm for rivet diameter exceeding 25 mm
C. 2.0 mm for rivet diameter over 25 mm
D. None of these
Answer : C

50. To keep the intensity of bearing pressure between the column base and concrete, compressive throughout the length of the column base, the ratio of the moment M to axial load P should be
A. < L/3
B. < L/6
C. > L/3
D. > L/6
Answer : B