A. 70% copper and 30% zinc
B. 90% copper and 10% tin
C. 85-92% copper and rest tin with little lead and nickel
D. 70-75% copper and rest tin
E. 70% copper and 30% tin
Related Mcqs:
- 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
E. 94% aluminium and 6% tin - Brass (alloy of copper and zinc) is an example of__________________?
A. substitutional solid solution
B. interstitial solid solution
C. intermetallic compounds
D. all of the above
E. none of the above - The crystal structure of brass is_________________?
A. F.C.C.
B. B.C.C.
C. H.C.P.
D. Orthorhombic crystalline structure
E. none of the above - Admiralty brass used for steam condenser tubes contains copper and zinc in the following ratio_________________?
A. 50 : 50
B. 30 : 70
C. 70 : 30
D. 40 : 60
E. 60 : 40 - In which of the following cases, consideration of creep is important_________________?
A. flywheel of steam engine
B. cast iron pipes”
C. cycle chains
D. gas turbine blades
E. piston I.C. engine - The surface hardness of the following order is achieved by nitriding operation__________________?
A. 600 VPN
B. 1500 VPN
C. 1000 to 1100 VPN
D. 250 VPN
E. 2000 VPN - Gamma iron exits at following temperature___________________?
A. room temperature
B. near melting point
C. between 1400°C and 1539°C
D. between 910°C and 1400°C
E. none of the above - Pipes for bicycle frames are made of___________________?
A. cold rolled steel
B. hot rolled steel
C. forged steel
D. cast steel
E. carbon-chrome steel - Permalloy is a___________________?
A. kind of stainless steel
B. none ferrous alloy
C. polymer
D. cutting tool material
E. nickel and iron alloy having high permeability - 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
E. copper, zinc and antimony
