68. Name the structure carrying discharge of a natural stream across a canal intercepting the

stream :
(ക) © Gallery - (B) Cut off pile
)0 Cross drainage work (D) Sluice

69. Which among the following is torsional rigidity?
(4) product of rigidity modulus and moment of inertia
(B) product of rigidity modulus and polar moment of inertia
(ಛಿ) product of rigidity modulus and angle of twist
(D) product of torque and radius of shaft

70. During setting and hardening of cement concrete, hydration of which among the following
contributes to the progressive strength of concrete?

^) த B). CA
© CAF യ മുട
71. What is the polar moment of inertial of a circle of diameter D?
7)* 4
ಉ ೫೫ ® =
4 & D D4
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72. What is called, the time in hours taken by rainwater that falls at the farthest point to reach
the outlet of a catchment?
(A) effective duration (B) basin lag
(C) time of concentration (D) recession time

78. Name the short sections of wood or steel, which are fixed on principal rafter of trusses to
support purlins :
(^) ridge piece (2) wall plate
(0) ടട board യ ணி

74. Name the area to be irrigated by a dam :
(A) ayacut (3) catchment area
(ಲ) reservoir (D) upstream side

75. Among the following methods for computing average precipitation (or rainfall) in which
method the area of the basin is not taken into account?
(4) Isohyetal method 18) Thiesson polygon method
(C) Arithmetic average method (D) None of these

A ४ 11 130/2015
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