Engineering Materials
The usual composition of a soldering alloy is

Tin, lead and silver
Tin and copper
Tin and lead
Tin, lead and small percentage of antimony

ANSWER DOWNLOAD EXAMIANS APP

Engineering Materials
In a hardening process, the hypo-eutectoid steel is

Heated from 30°C to 50°C above the upper critical temperature and then cooled in still air
Heated below or closes to the lower critical temperature and then cooled slowly
Heated from 30°C to 50°C above the upper critical temperature and then cooled slowly in the furnace
Heated from 30°C to 50°C above the upper critical temperature and then cooled suddenly in a suitable cooling medium

ANSWER DOWNLOAD EXAMIANS APP