Muntz metal contains copper and zinc in the ratio of________________?

A. 50 : 50
B. 40 : 60
C. 60 : 40
D. 20 : 80

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

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

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

Phosphor bronze contains____________________?

A. 0.5% of phosphorous
B. 1% phosphorous
C. 2.5% phosphorous
D. 5% phosphorous

Which of the following alloys does not contain tin_________________?

A. White metal
B. Solder admiralty
C. Fusible metal
D. Phosphor bronze

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

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

Elinvar, an alloy used in precision instruments, hair springs for watches, etc. contains the following element as principal alloying element__________________?

A. iron
B. copper
C. aluminium
D. zinc

Constantant an alloy used in thermocouples is an alloy of __________________?

A. Copper and tin
B. Copper and zinc
C. Copper and iron
D. Copper and nickel