Engineering Materials
Gun metal contains

70% copper and 30% zinc
90% copper and 10% tin
85 - 92% copper and rest tin with little lead and nickel
70 - 78% copper and rest tin

ANSWER DOWNLOAD EXAMIANS APP

Engineering Materials
Pick up wrong statement about wrought iron

It contains carbon of the order of 0 to 0.25%
It is very soft and ductile
It is made by adding suitable percentage of carbon to molten iron and subjecting the product to repeated hammering and rolling
It melts at 1535°C

ANSWER DOWNLOAD EXAMIANS APP

Engineering Materials
In spheroidising process, the steel is

Heated up to the lower critical temperature and then cooled in still air
Heated below the lower critical temperature and then cooled slowly
Heated slightly above the lower critical temperature and then cooled slowly to a temperature of 600°C
None of these

ANSWER DOWNLOAD EXAMIANS APP