After completion of a company risk assessment the use of large hammer drills has a significant risk rating. What would the plumber have to do to comply with the risk assessment? A) take no additional precautions

which one of following is true of LPG heating gases?

A) Butane is lighter then air and any leaking gas will accomulate near a ceiling

B) Propane is heavier than air and any leaking gas will accomulate at ground level

C) Propane is lighter then air and any leaking gas will accomulate near a ceiling

D) Both propane and Butane are lighter than air and any leaking gas will accomulate near a ceiling

B IS THE RIGHT ANSWER