Heat exchanger tubes are never made of:
Heat exchanger tubes are never made of:
A. Plain Carbon Steel
B. Stainless Steel
C. Lead
D. Copper
A. Plain Carbon Steel
B. Stainless Steel
C. Lead
D. Copper
A. Chlorea
B. Plague
C. Diphtheira
D. Tetanus
A. Gulf Stream
B. Brazil
C. Benguela
D. Kuroshio
A. Domestic fowl
B. Earthworm
C. Rabbit
D. None
A. thyroid
B. pancreas
C. parathyroid
D. all of these
The liver and pancreas are both exocrine and endocrine glands; they are exocrine glands because they secrete products—bile and pancreatic juice—into the gastrointestinal tract through a series of ducts, and endocrine because they secrete other substances directly into the bloodstream.
A. Convex mirror
B. Concave mirror
C. Plane mirror
D. Both (b) and (c)