85. P = 47c2 El is the equation of Euler's crippling load if

A. both at the ends are fixed

B. both the ends are hinged

C. one end is fixed and other end is free

D. one end is fixed and other end is hinged:

86. P =n2E1 is the equation of Euler's crippling load, if 4 L2

A. both the ends are fixed

B. both the ends are hinged

C. one end is fixed and other end is free

D. one end is fixed and other end is hinged.

87. The equivalent length of a column of length L having one end fixed and the other end free, is

A. 2L

B. L

C.3L

D.4L

88. The ratio of crippling loads of a column having both the ends fixed to the column having both the ends hinged, is

A.1

B.2

C.3

D.4

89. For calculating the allowable stress of long columns. (The empirical formula bo -,'(-3-Y-n 1 - a) , is known as

A. Straight line formula

B. Parabolic formula

C. Perry's formula

D. Rankine's formula.

90. calculOing the allowable stress of long columns Gy GO=1- a ris the empirical formula, known as

A. Straight line formula

B. Parabolic formula

C. Perry's formula

D. Rankine's formula.

91. For calculating the permissible stress of long columnsGO= 0 is the empirical formula, known as1 + a (l/ r)

A. Straight line formula

B. Parabolic formula

C. Perry's formula

D. Rankine's formula.

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