A. Carbon dioxide
B. Hydrogen
C. Ammonia
D. All the above
A. 15 days
B. 30 days
C. 60 days
D. 90 days
A. Highly resistant to sulphide corrosion
B. Highly impervious
C. Hydraulically efficient because of their smooth interior surface
D. Especially suited to pressure pipes
A. marble
B. lime stone
C. compact sand stone
D. granite
A. 25,000 to 35,000 litres/sqm/day
B. 40,000 to 50,000 litres/sqm/day
C. 50,000 to 60,000 litres/sqm/day
D. 80,000 to 10,000 litres/sqm/day
A.p = Txr
B.p = T/r
C. p = T/2r
D.p = 2T/r
E. none of the above
A. 1000
B. 2100
C. 2700
D. 10,000
E. 21,000.