For platinum thermocouples lead wires are made of _______________________? Instrumentation and Process Control Mcqs April 24, 2020April 24, 2020 BILAL KHATTAK0 A.iron and copper B.copper and copper-nickel alloy C.nickel and iron D.tin and nickel. Related Mcqs: Invar is a _______________? Permalloy is International Prototype Meter is made of Brass is Monel metal is Inconel is an alloy containing Piston of an engine is made of: Solder is an alloy consisting of _________________? Invar is an alloy of Which one of the following thermocouples develops least e.m.f. for the same difference of temperature between hot and cold junctions?