Chemical Engineering MCQs

6108 MCQs  (Page 464 of 611)

The main purpose of galvanising iron sheets is to___________________?
A. Harden the surface
B. Increase its glossiness and lustre
C. Prevent the action of water
D. Prevent the action of oxygen
Presence of high amount of silicon in cast iron________________?
A. Suppresses the decomposition of fe3c
B. Increases the formation of graphite
C. Increases the contraction of the metal
D. Reduces its fluidity
Tin vessels are corroded by____________________?
A. Anhydrous ammonia
B. Aromatic solvents
C. Synthetic detergent solution
D. None of these
18/8 steel is a/an __________ stainless steel ?
A. Austenitic
B. Ferritic
C. Martensitic
D. None of these
Work hardening of a material ________________?
A. Decreases its tensile strength
B. Decreases its ductility
C. Increases its ductility
D. Does not affect its ductility
German silver in an alloy of________________?
A. Copper, nickel and zinc
B. Copper, aluminium and silver
C. Silver, zinc and aluminium
D. Silver, nickel and zinc
Concentrated HCl at 30°C can be stored in a vessel made of ________________________?
A. Ptfe and porcelain
B. Cast iron and aluminium
C. Stainless steel and high silicon cast iron
D. None of these