Elinvar, an alloy used in precision instruments, hair springs for watches, etc. contains the following element as principal alloying element__________________?

Related Mcqs:

1. Structural steel contains following principal alloying elements__________________?

   A. nickel, chromium and manganese B. tungsten, molybdenum and phosphorous C. lead, tin, aluminium D. zinc, sulphur, and chromium E. none of the above...

2. 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...

3. Perminvar alloy having constant permeability is an alloy of________________?

   A. nickel, copper and iron B. nickel, copper and zinc C. copper, nickel and antimony D. iron, zinc and bismuth E. antimony, copper and zinc...

4. 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...

5. Which of the following instruments is used to measure flow on the application of Bernoulli’s theorem_________________?

   A. Venturimeter B. Orifice plate C. nozzle D. pitot tube E. all of the above...

6. Inconel is an alloy of___________________?

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

7. 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...

8. 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...

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...