78. The ratio of maximum deviation angle and maximum polar deflection angle of a Lemniscate curve, is

A.2

B.3

C.4

D.5

79. The maximum radial distance of a Lemniscate curve, having maximum polar angle a, is

A. 3 R sin a

B. 3 R sin2 a

C. 3 R sin 2a

D. 3 R sin 0;12

80. If a Lemniscate curve having an angle of deflection A, is transitional throughout, the maximum polar angle is

A. A/2

B.413

C. A/4

D. 6.16.

81. In a right angle bend of a road provided with a transition throughout, the maxi-mum polar angle will be

A.100

B. 15?

C. 20?

D.300

82. If a Lemniscate curve of transition throughout is introduced to connect two parallel roads, the maximum polar angle of the curve, is

A. 10?

B. 15?

C. 20?

D. 30?

83. If R is the radius of a main curve and L is the length of the transition curve, the shift of the curve, is

A. L/24 R

B. L2124 R

C. L3124 R

D. L4/24 R

84. If L is the length of the transition curves provided on either side of a circular curve of radius R, the maximum angle of deflection with tangent for the junctions of the transition curve and circular curve, is

A. L I R

B. L I 2R '

C. LI3R

D. none of these.

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