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.Management Sciences
Category: Materials and Construction
Which of the following crystal structures characterises the austenitic stainless steel ?
A. Simple hexagonal
B. Body centred cubic
C. Face centred cubic
D. None of these
The purpose of nitriding the steel is to___________________?
A. Harden its surface
B. Soften its surface
C. Improve its reliability
D. None of these
Carbon is present in the uncombined (graphitic) form in case of__________________?
A. Cast iron
B. Steel
C. Ferroalloy
D. None of these
Lead pipe is_____________________?
A. Especially resistant to solutions containing H2SO4
B. Usually joined by burning (e.g. by melting to adjacent pieces with a torch)
C. Having very low elastic limit resulting in permanent deformation from either mechanical or
thermal strain
D. All A., B. and C.
Cast iron vessels are not suitable for the storage of_________________?
A. Freon
B. H2SO4 (95%) at room temperature
C. H2SO4 (fuming)
D. Wet SO2
The addition of antimony in tin-based alloys improves its________________?
A. Rupture strength and hot hardness
B. Impact strength and bonding strength
C. Deformation resistance
D. Wear resistance
Evaporator used for concentrating tomato juice is made of __________________?
A. Nickel
B. Brass
C. Stainless steel-glass lined
D. Cast iron-rubber lined
Anodic material used for the cathodic protection of underground buried steel pipeline is_________________?
A. Nickel or copper
B. Zinc or magnesium
C. Bronze
D. Brass
Tin vessels are corroded by____________________?
A. Anhydrous ammonia
B. Aromatic solvents
C. Synthetic detergent solution
D. None of these
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