851. The C.G. of a right circular cone lies on its axis of symmetry at a height of
A. h/2
B. h/3
C. hI4
D. hI5

852. Centre of gravity of a thin hollow cone lies on the axis of symmmetry at a height of
A. one-half of the total height above base
B. one-third of the total height above base
C. one-fourth of the total height above base
D. none of these.

853. The Centre of gravity of a 10 x 15 x 5 cm T section from its bottom, is
A. 7.5 cm
B. 5.0 cm
C. 8.75 cm
D. 7.85 cm

854. A square hole is punched out of a circular lamina, the diagonal of the square being the radius of the circle. If r is the radius of the circle, the C.G. of the remainder from the corner of the square on the circumference will be
A. r(rc + 0.25)
B. r(iT – 0.5)Tr -I- 0.25
C. rqc_-. 0.25)
D. rift+ 0.25J

855. The minimum number of rivets for the connection of a rivet hole and the gusset plate, is
A.1
B.2
C.3
D.4

856. The weakest section of a diamond riveting, is the section which passes through
A. first row
B. second row
C. central raw
D. one rivet hole of end row.

857. If b is the width of a plate joined by diamond riveting of diameter d, the efficiency of the joint is given by
A. b + d
B. b – d
C. -E (1 – m)
D. P (1 + m)

858. The type of butt joints in common use, is :
A. single inverted V-butt joint
B. double V-butt joint
C. double U-butt joint
D. single V-butt joint.

859. The maximum load to which a fillet joint of length L can be subjected to, is
A. 0.7 x S x fillet size x L
B. 2 x S x fillet size x L
C. permissible shear stress x fillet size x L
D.S x fillet size x L 3

860. The maximum resistance against rotation, is offered by the weld at a point
A. most distant
B. least distant
C. at either end
D. centrally located.

NOTE
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