MCQs on Buckling of Columns
1 - Question
Piston rod is an example of column.
a) True
b) False
View Answer
Answer: a
Explanation: An slender machine component having its length considerable in proportion to its width qualifies for a column criterion.
2 - Question
Bucking of column means
a) Lateral deflection
b) Axial deflection
c) Torsional deflection
d) None of the listed
View Answer
Answer: d
Explanation: Buckling is characterised by lateral deflection but it is different from lateral deflection as there is sudden lateral deflection in buckling unlike lateral deflection where there is gradual deflection.
3 - Question
Slenderness ratio is [l= length of column and k= least radius of gyration of cross section about its axis].
a) l/k
b) k/l
c) l/2k
d) k/2l
View Answer
Answer: a
Explanation: It is a ratio of length to least radius of gyration.
4 - Question
Columns with what slenderness ratio are not designed with respect to buckling but are designed for compressive stresses.
a) >1
b) <1 c) >30
d) <30
View Answer
Answer: d
Explanation: When slenderness ratio is <30, there is no effect of buckling.
5 - Question
If slenderness ratio=45, which mode of failure will dominate?
a) Buckling
b) Compressive Stresses
c) Both buckling and compressive stress
d) Can’t be stated
View Answer
Answer: a
Explanation: If slenderness ratio>30, column shall be more prone to buckling.
6 - Question
Short column and long column are classified on the basis of
a) Slenderness ratio
b) Diameter
c) Length
d) None of the listed
View Answer
Answer: a
Explanation: Slenderness ratio takes into consideration length and radius of gyration and thus is preferred.
7 - Question
Cast iron column with a slenderness ratio of 75 are
a) Short Columns
b) Long Columns
c) Very short columns
d) None of the listed
View Answer
Answer: a
Explanation: Cast iron column with a slenderness ratio <80are short columns.
8 - Question
Steel columns with a slenderness ratio of 95 are
a) Short Columns
b) Long columns
c) Very long columns
d) None of the listed
View Answer
Answer: a
Explanation: Steel columns with slenderness ratio <100 are classified in short columns.
9 - Question
Which of the following are true for End fixity coefficient
a) Dimensionless number
b) Used in Euler’s equation
c) Provides condition of restraint at two ends
d) All of the listed
View Answer
Answer: d
Explanation: It is a dimensionless number used in Euler’s equation to take into account the restraints at the two ends.
10 - Question
Value of end fixity coefficient for both hands fixed is
a) 1
b) 4
c) 2
d) 0.25
View Answer
Answer: b
Explanation: Lower the mobility higher is the end fixity component.