FITTER THEORY SEMESTER IV iti question paper

Case hardening is a method of producing hard skin on the surface of ................
a) Low-carbon steel parts
b) Alloy steel parts
c) High-carbon steel parts
d) Cast iron (heavy parts)

"Cyaniding" and "Nitriding" are two methods of....................
a) Tempering
b) Normalising
c) Hardening
d) Case hardening

Medium solder contains...............
a) 37% lead and 63% tin
c) 70% lead and 50% tin
b) 50% lead and 50% tin
d) None of these

Melting temperature range of soft solder................
a) 150-350°c
c) 500-600 °c
b) 600-900 °c
d) None of these

Best conductor of heat and electricity
a) Copper
b) Aluminium
c) Nickel
d) Chromium