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
Corrosion resistance of steel is increased by the addition of_________________?
(A) Phosphorous and tungsten
(B) Nickel and chromium
(C) Lead and vanadium
(D) Molybdenum and tungsten
Liquid ammonia is shipped in _____________ containers?
(A) Steel
(B) Aluminium
(C) Glass
(D) Lead lined
Zinc is highly ______________ at room temperature?
(A) Ductile
(B) Resistant to atmospheric corrosion
(C) Malleable
(D) Brittle
Dielectric strength of a material is____________________?
(A) Its energy storage capacity
(B) A magnetic property
(C) Its capacity to resist the flow of current
(D) Its capacity to withstand high voltage
Monel alloy is____________________?
(A) The costliest of all the alloys of nickel
(B) Not suitable for making kitchen utensils
(C) Used for making steam valves and turbine blades as it resists steam attack at high temperature
(D) Not used in cast and wrought forms
Cementite is________________?
(A) Fe3C chemically
(B) A compound of carbon and iron
(C) Characterised by an orthorhombic crystal structure
(D) All
Perspex is nothing but_____________________?
(A) Acrylic sheet
(B) An elastomer
(C) An alloy of lead and tin
(D) Aluminium foil clad with Bakelite
Ceramic recuperators are generally made of_________________?
(A) Silicon carbide
(B) Calcium carbide
(C) Fireclay bricks
(D) High alumina bricks
Kel-F is a material, which is________________?
(A) Chemically known as Polychlorotrifluoroethylene (PTFE)
(B) Having excellent chemical & high temperature resistance (upto 200°C)
(C) Having elastomeric properties
(D) All