61. A laminated spring is given an initial curvature because
a) it is more economical
b) it gives uniform strength
c) spring becomes flat when it is subjec-ted to design load
d) none of the above
Ans: c
62. A laminated spring is supported at
a) ends and loaded at centre
b) centre and loaded at ends
c) ends and loaded anywhere
d) centre and loaded anywhere
Ans: b
63. Laminated springs are subjected to
a) direct stress
b) bending stress
c) shear stress
d) none of the above
Ans: b
64. Deflection in a leaf spring is more if its
a) strength is more
b) strength is less
c) stiffness is less
d) stiffness is more
Ans: c
65. Buckling load for a given column depends upon
a) length of column only
b) least lateral dimension only
c) both length and least lateral dimension
d) none of the above
Ans: c
66. When both ends of a column are fixed, the crippling load is P. If one end of the column is made free, the value of crippling load will be changed to
a) P/16
b) P/4
c) P/2
d) 4P
Ans: a
67. Euler's formula for a mild steel long column hinged at both ends is not valid for slenderness ratio
a) greater than 80
b) less than 80
c) greater than 180
d) greater than 120
Ans: b
68. A long column has maximum crippling load when its
a) both ends are hinged
b) both ends are fixed
c) one end is fixed and other end is hinged
d) one end is fixed and other end is free
Ans: b
69. Effective length of a chimney of 20 m height is taken as
a) 10 m
b) 20m
c) 28.28m
d) 40m
Ans: d
70. Rankine's formula for column is valid when slenderness ratio
a) lies between 0 and 140
b) lies between 0 and 100
c) is less than 80
d) has any value
Ans: d
a) it is more economical
b) it gives uniform strength
c) spring becomes flat when it is subjec-ted to design load
d) none of the above
Ans: c
62. A laminated spring is supported at
a) ends and loaded at centre
b) centre and loaded at ends
c) ends and loaded anywhere
d) centre and loaded anywhere
Ans: b
63. Laminated springs are subjected to
a) direct stress
b) bending stress
c) shear stress
d) none of the above
Ans: b
64. Deflection in a leaf spring is more if its
a) strength is more
b) strength is less
c) stiffness is less
d) stiffness is more
Ans: c
65. Buckling load for a given column depends upon
a) length of column only
b) least lateral dimension only
c) both length and least lateral dimension
d) none of the above
Ans: c
66. When both ends of a column are fixed, the crippling load is P. If one end of the column is made free, the value of crippling load will be changed to
a) P/16
b) P/4
c) P/2
d) 4P
Ans: a
67. Euler's formula for a mild steel long column hinged at both ends is not valid for slenderness ratio
a) greater than 80
b) less than 80
c) greater than 180
d) greater than 120
Ans: b
68. A long column has maximum crippling load when its
a) both ends are hinged
b) both ends are fixed
c) one end is fixed and other end is hinged
d) one end is fixed and other end is free
Ans: b
69. Effective length of a chimney of 20 m height is taken as
a) 10 m
b) 20m
c) 28.28m
d) 40m
Ans: d
70. Rankine's formula for column is valid when slenderness ratio
a) lies between 0 and 140
b) lies between 0 and 100
c) is less than 80
d) has any value
Ans: d
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