Pearlite is a combination of___________________?
(A) ferrite and cementite
(B) cementite and gamma iron
(C) ferrite and austenite
(D) ferrite and iron graphite
(D) pearlite and ferrite
Lead is poured into the joint between two pipes. These pipes may be made of____________________?
(A) cast iron
(B) vitrified clay
(C) asbestos cement
(D) concrete
(D) mild steel
Austenite rs a combination of_________________?
(A) ferrite and cementite
(B) cementite and gamma iron
(C) ferrite and austenite
(D) ferrite and iron graphite
(D) pearlite and ferrite
Perminvar alloy having constant permeability is an alloy of________________?
(A) nickel, copper and iron
(B) nickel, copper and zinc
(C) copper, nickel and antimony
(D) iron, zinc and bismuth
(D) antimony, copper and zinc
Monel metal contains_________________?
(A) 63 to 67% nickel and 30% copper
(B) 88% copper and 10% tin and rest zinc
(C) alloy of tin, lead and cadmium
(D) malleable iron and zinc
(D) none of the above
DuraJomin contains___________________?
(A) 94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
(B) 92.5% aluminium, 40% copper, 2% nickel, and 1.5% Mg
(C) 10% aluminium and 90% copper
(D) 90% magnesium and 9% aluminium with some copper
(D) 94% aluminium and 6% tin
Phosphor bronze contains____________________?
(A) 0.5% of phosphorous
(B) 1% phosphorous
(C) 2.5% phosphorous
(D) 5% phosphorous
(D) none of the above
Delta metal is an alloy of__________________?
(A) copper, zinc and iron
(B) iron, nickel and copper
(C) iron, lead and tin
(D) iron, aluminium and magnesium
(D) copper, zinc and antimony
Which of the following alloys does not contain tin_________________?
(A) white metal
(B) solder admiralty
(C) fusible metal
(D) phosphor bronze
(D) gun metal
Addition of copper to aluminium results in_____________________?
(A) improvement of casting characteristics
(B) improvement of corrosion resistance
(C) one of the best known age and precipitation-hardening systems
(D) improving machinability
(D) none of the above