COLUMNS & STRUTS MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS
COLUMNS & STRUTS
MULTIPLE CHOICE QUESTIONS
(MCQ) WITH ANSWERS
MCQ on columns & struts increase
confidence and understanding. Columns
are structural members subjected to axial
or eccentric loads. Short column fail
by compression. Medium columns fail by
compression & buckling. Long columns
fail by buckling alone.
Fig. Types of Columns-Short-Medium-Long (depends on slenderness ratio and material of column)
Fig. Equivalent of long columns under different fixing conditions
Fig. Axially and eccentrically loaded columns
-
The limiting slenderness ratio for a A steel short column is
.(a) ≤ 10
-
(b) ≤ 20
-
(c) ≤ 30
-
None
ANS: ©
-
The limiting slenderness ratio for a wooden short column is
-
(a) ≤ 10
-
(b) ≤ 20
-
(c) ≤ 30
-
None
ANS: (a)
-
Limiting slenderness ratio for a medium steel column is
(Le/k min) is
-
(a) ≥ 10 & ≤ 20
-
(b) ≥ 20 & ≤ 30
-
(c) ≥ 30 & ≤ 120
-
None
ANS: (c)
-
Limiting slenderness ratio for a medium wood column is
(a) ≥ 10 & ≤ 20
(b) ≥ 10 & ≤ 30
(c) ≥ 30 & ≤ 120
(d) None
ANS: (b)
-
Limiting slenderness ratio for a long steel column is
(a) ≥ 10 & ≤ 20
(b) ≥ 10 & ≤ 30
(c) ≥ 30 & ≤ 120
(d) None
ANS: (d)
-
Limiting slenderness ratio for a long wood Column is
(a) ≥10
(b) ≥20
(c) ≥ 30
(d) None
ANS: (c)
-
Slenderness ratio is
-
L/k
-
Le/k
-
k/L
-
None
ANS: (d)
-
Simple stress formula is applicable to a
-
Long column
-
Medium column
-
Short column
-
None
ANS: ©
9. Rankin’s Gordon formula is applicable to a
(a) Long column
(b) Medium column
(c) Short column
(d) None
ANS: (b)
10. Euler’s formula is applicable to a
(a) Long column
(b) Medium
(c) Short column
(d) None
ANS: (a)
11. Column with both ends hinged has the equivalent length as
(a) Firstly Le = L
(b) Secondly Le = L/2,
(c) Thirdly Le = L/2,
(d) None
ANS: (a)
-
Column with one end fixed & other end free, the equivalent length is
-
(a) Firstly Le = L
-
(b) Secondly Le = L/2,
-
(c) Thirdly Le = L/2,
-
(d) None
ANS: (d)
-
Column with both ends fixed, the equivalent length is
-
Firstly Le = L
-
Secondly Le = L/2,
-
Thirdly Le = L/ √2,
-
None
ANS: (b)
-
Column with one end fixed & other end hinged, the equivalent length is
-
Firstly Le = L
-
Secondly Le = L/2√2,
-
Thirdly Le = L/2,
-
None
ANS: (d)
15. Column with one end fixed & other hinged, the equivalent length is
-
Firstly Le = L
-
Secondly Le = L/√2,
-
Thirdly Le = L/2,
-
None
ANS: (b)
-
Column failing by buckling alone is a
-
Short column
-
Medium column
-
Short as well as medium column
-
None
ANS: (d)
17. The radius of gyration for a circular column is
-
-
D
-
D/2
-
D/4
-
None
-
ANS: (c )
-
18. Struts are
(a) Short columns
(b) Medium columns
(c) Long columns
(d) None
AND: (d)
19. Struts are long compression members which are
(a) Vertical
(b) horizontal
(c) Horizontal and inclined
(d) None
ANS: (c)
20. The inclination of a strut with horizontal is
-
-
900
-
Any angle between 00 & <900
-
Both (a) & (b)
-
None
-
ANS: (b)
21. The inclination of a column with horizontal is
-
-
900
-
Any angle between 00 & <900
-
Both (a) & (b)
-
None
-
ANS: (a)
22. A column is
-
-
Short
-
Medium
-
Short, medium & long
-
None
-
ANS: (c
23. The buckling takes place about the axis having
-
-
Maximum moment of inertia
-
Minimum moment of inertia
-
Both maximum & minimum moment of inertia
-
None
-
ANS: (b)
24. The buckling load for a long column is
-
-
Safe load/Factor of safety
-
Safe load X Factor of safety
-
Both (a) & (b)
-
None
-
ANS: (b)
25. The material of the column is
-
-
Homogeneous &isotropic
-
Isotropic & Continuous
-
Isotropic, continuous & homogeneous
-
None
-
ANS: (c )
26. The self weight of the column is
-
-
Considered
-
Neglected
-
Both (a) & (b)
-
None
-
ANS: (b)
27. The load acting on the column is
-
-
Lateral
-
Axial
-
Transverse
-
None
-
ANS: (b)
28. Euler assume the column as
-
-
Short & thin
-
Medium & thin
-
Long & thin
-
None
-
ANS: (c )
29. Which one is Johnson’s parabolic formula
-
-
Firstly P/A =σc[1—α(Le/kmin)]
-
Secondly P/A =σc[1—α(Le/kmin)2]
-
Thirdly P/A =σc[1—α(Le/kmin)3]
-
None
-
ANS: (b)
30. The load acting on a beam-column is
-
-
Lateral load
-
Axial load
-
Axial + lateral
-
None
-
ANS: (c )
31. A strut may fail by
-
-
Pure compression
-
Buckling
-
Both (a) & (b)
-
None
-
ANS: (b)
32. Euler Buckling load of a column of length ‘ L ‘ with one end fixed & other free is
-
-
4 Π2E/(L/kmin)2
-
2Π2E/(L/kmin)2
-
Π2E/4(L/kmin)2
-
None
-
ANS: (c )
33. Euler Buckling load of a column of length ‘ L ‘ with both ends fixed is
-
4 Π2E/(L/kmin)2
-
2Π2E/(L/kmin)2
-
Π2E/4(L/kmin)2
-
None
ANS: (a )
34. Euler Buckling load of a column of length ‘ L ‘ with one end fixed & other hinged is
-
-
4 Π2E/(L/kmin)2
-
2Π2E/(L/kmin)2
-
Π2E/4(L/kmin)2
-
None
-
-
ANS: (b )
35. Euler Buckling load of a column of length ‘ L ‘ with both ends hinged is
-
-
4 Π2E/(L/kmin)2
-
2Π2E/(L/kmin)2
-
Π2E/4(L/kmin)2
-
None
-
-
ANS: (d )
36. Euler Buckling load of a column of length ‘ L ‘ with both ends hinged is
-
-
4 Π2E/(L/kmin)2
-
2Π2E/(L/kmin)2
-
Π2E/(L/kmin)2
-
None
-
-
ANS: (c )
37. The ratio of Euler buckling loads of a fixed column to cantilever column is
-
8
-
12
-
16
-
None
ANS: (c )
38. Increase of slender ratio
-
Decreases the strength of the column
-
Increases the strength of the column
-
No change in the strength of the column
-
None
ANS: (a)
39. Load carrying capacity of a long column with both ends fixed is
-
Firstly Pcr = π2 E/(Le /kmin)2
-
Secondly Pcr = 2π2 E/(Le /kmin)2
-
Thirdly Pcr = 4π2 E/(Le /kmin)2
-
None
ANS: (c)
40. Load carrying capacity of a long column with both ends hinged is
-
Firstly Pcr = π2 E/(Le /kmin)2
-
Secondly Pcr = 2π2 E/(Le /kmin)2
-
Thirdly Pcr = 4π2 E/(Le /kmin)2
-
None
ANS: (a)
41. Load carrying capacity of a long column with one end fixed and other free is
-
Firstly Pcr = π2 E/(Le /kmin)2
-
Secondly Pcr = 2π2 E/(Le /kmin)2
-
Thirdly Pcr = 4π2 E/(Le /kmin)2
-
None
ANS: (d)
42. Load carrying capacity of a long column with one fixed and other free is
-
Firstly Pcr = π2 E/(Le /kmin)2/ 2
-
Secondly Pcr = 2π2 E/(Le /kmin)2 /4
-
Thirdly Pcr = 4π2 E/(Le /kmin)2 / 8
-
None
ANS: (b)
43. Load carrying capacity of a long column with one end fixed and other hinged is
-
Firstly Pcr = π2 E/(Le /kmin)2 /2
-
Secondly Pcr = 2π2 E/(Le /kmin)2 /4
-
Thirdly Pcr = 4π2 E/(Le /kmin)2 /8
-
None
ANS: (a)
44. The strength of an eccentrically loaded column vs axially loaded column
-
Increases
-
Decreases
-
Remains same
-
None
ANS: (b)
45. Column under eccentric loading is under
-
One stress
-
Two stresses
-
Three stresses
-
None
ANS: (b)
46. There is a column with hinged ends of rectangular section 20 x 40 mm with length as 2 m. Select the slenderness ratio.
-
946
-
546
-
346
-
None
ANS: (c)
47. The diameter and length of a circular solid column with fixed ends is 40 mm and 3 m. Select the slenderness ratio.
-
150
-
200
-
250
-
None
ANS: (a)
48. Give the slenderness ratio of a cantilever column with diameter as 40 mm and length 2 m.
-
600
-
500
-
400
-
None
ANS: (c)
49. The modulus of material which effects the column buckling load.
-
Bulk modulus
-
Shear modulus
-
Young’s modulus
-
None
ANS: (c)
50. The column which has the maximum buckling load carrying capacity
-
Hinged at both ends
-
One end fixed and other end free
-
Fixed at one end and hinged at the other
-
None
ANS: (c)
51. The column which has the least effective length
-
Hinged at both ends
-
One end fixed and other free
-
Fixed at one end and hinged at the other end
-
None
ANS: ©
52. Buckling of a long column results in
-
Lateral deflection
-
Axial deflection
-
Both (a) & (b)
-
None
ANS: (a)
53. The length and effective lengths of a column is L and Le. The minimum radius of gyration is ‘k’. The slenderness ratio is
-
L/k
-
Le / k
-
Both (a) & (b)
-
None
ANS: (b)
54. Critical stress for a long column is
-
> buckling stress
-
< buckling stress
-
=2 x buckling stress
-
None
ANS: (d)
55. Crippling stress for a long column is
-
< buckling stress
-
> buckling stress
-
= bucking stress
-
None
ANS: (c)
https://www.mesubjects.net/wp-admin/post.php?post=3477&action=edit Q.A. Columns
https://www.mesubjects.net/wp-admin/post.php?post=13106&action=edit Columns Struts