21) Beafort number of hurricane is
(a) 6
(b) 8
(c) 10
(d) 12
22) If ‘N’ is the number of shafts used, then the total number of faces available for attacking the excavation and construction in tunnes are
a) 2 N
b) N + 2
c) 2 N + 1
c) 2 N + 2
23) Kandla is a
(a) military harbour
(b) artificial harbour
(c) natural harbour
(d) semi-natural harbor
Good Luck!!