Regarding efficiency of roof bolting some circulars were issued which of the following statement is true as per cir 5/2002 and 11/2002?
A. efficiency of bolt should be monitored regularly
B. anchorage testing machine design should be conducive to testing strength of bolts
C. results of anchorage testing machine should be analysed adequately
D. intensive training should be given to timber men
Answer: Option B

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