What is the correct answer?


Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than

A. 5

B. 10

C. 20

D. 35

Correct Answer :

C. 20

Related Questions

Good design of the casing of a centrifugal pump aims at minimising the Cold cracking in the heat affected zone of a high strength steel weld… The ratio of the shear stress to the principal stress on a principal plane… Addition of __________ to steel does not impart hardness. Desalination of water Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of… Alcohols are not suitable as diesel engine fuel because the cetane number… Working of linear variable differential transducer (LVDT) is based on… Encyclopaedia of Chemical Technology has been Blast furnace slag is mainly molten Property responsible for the talcum powder to cling to the skin is the 'Ice point' is designated on Fahrenheit temperature scale by As per international norms, the maximum permissible value of noise level… An ideal material for making cooking vessels should have Eutectic reaction for iron-carbon system occurs at a temperature of __________… Capacity & power requirement for an air compressor working at high altitude… Which of the following alloying elements is present in maximum percentage… Powder metallurgy process does not make metal powder by Air-petrol ratio for maximum power generation in spark ignition engine… Ammonia leakage in the refrigeration system is detected by Nuclear fission of one atom of uranium-235 produces the energy equivalent… Ganister contains maximum percentage of Which of the following is not a charge material for cupola? Speed of a submarine in deep sea & that of an aeroplane is measured by… A common disinfectant used in village wells for disinfection of water… About __________ ton of coke is required in a cupola to produce one ton… Normalising does not __________ of a metal. Vibration upto 100 kilo hertz can be most accurately measured by a __________… In inventory control theory, the economic order quantity (EOQ) is the For the irreversible reaction, Ca+ 2C = Ca C2 , Δ H°298 = - 60000…