Perminvar alloy having constant permeability is an alloy of________________?

Related Mcqs:

1. Constantant an alloy used in thermocouples is an alloy of __________________?

   A. copper and tin B. copper and zinc C. copper and iron D. copper and nickel E. copper and chromium...

2. Solder is an alloy consisting of________________?

   A. tin, antimony, copper B. tin and copper C. tin and lead D. lead and zinc E. lead and copper...

3. Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is__________________?

   A. silver metal B. duralumin C. Hastelloy D. monel metal E. invar...

4. German silver is an alloy of___________________?

   A. silver and some impurities B. refined silver C. nickel, copper and zinc D. nickel and copper E. silver and gold...

5. Inconel is an alloy of___________________?

   A. nickel, chromium and iron B. nickel, copper C. nickel, chromium D. nickel, zinc E. nickel, lead...

6. Brass (alloy of copper and zinc) is an example of__________________?

   A. substitutional solid solution B. interstitial solid solution C. intermetallic compounds D. all of the above E. none of the above...

7. The usual composition of a soldering alloy is__________________?

   A. tin, lead and small percentage of antimony B. tin and lead C. tin, lead and silver D. tin and copper E. tin, copper and lead...

8. Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio _____________________?

   A. 50 : 20 : 20 : 10 B. 40 : 30 : 20 : 10 C. 50 : 20 : 10 : 20 D. 30 : 20 : 30 : 20 E. 50 : 10 : 20 : 20...

9. The alloy used for making electrical resistances and heating elements is____________________?

   A. nichrome B. invar C. magnin D. elinvar E. peiminvar...

10. Delta metal is an alloy of__________________?

    A. copper, zinc and iron B. iron, nickel and copper C. iron, lead and tin D. iron, aluminium and magnesium E. copper, zinc and antimony...