All of the following materials have abrasive action on the belt conveyors except?
A.Arsenic salts
B.Borax
C.Wet ash
D.Alum
A.Arsenic salts
B.Borax
C.Wet ash
D.Alum
A.light work
B.infrequent service
C.either of (A) or (B) above
A.10 to 15 kg/HP
B.25 to 35 kg/HP
C.45 to 50 kg/HP
D.85 to 100 kg/HP
A.Electric hoists
B.Magnetic hoists
C.Hand chain hoists
D.all of the above
A.dc motor
B.Slip ring type induction motor
C.Ward Leonard system
D.Any of the above
A.manually operated
B.battery operated
C.diesel engine powered
D.Any of the above
A.Length
B.Lay
C.Material of core
D.Surface finish
A.mining areas for transportation of minerals
B.sleepers, pipes etc
C.heavy machinery
D.None of the above
A.Alum
B.Hog fuel
C.Bran
D.Coffee beans
A.Stone, crushed
B.Wet clay
C.Foundry sand
D.Coal, run of mine