1. The surface width of cracks shall not generally exceed.

a. 0.1 mm
b. 0.2 mm
c. 0.3 mm
d. 0.4 mm

Answer : c

2. Beaufort scale measure the velocity (km/h) of wind at a height of ……... above flat ground 

a) 10 m 

b) 20 m 

c) 30 m 

d) 40 m


Answer : a

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