Copper has very low________________?

Related Mcqs:

1. __________________ does not contain copper as an alloying element?

   A. Nichrome
   B. Manganin
   C. Perminvar
   D. Monel metal

2. German silver is an alloy of copper, nickel and________________?

   A. Zinc
   B. Silver
   C. Tin
   D. Lead

3. Presence of even very minute amount (say 0.1%) of ______________ in copper, reduces its electrical conductivity very seriously?

   A. Bismuth
   B. Arsenic
   C. Antimony
   D. Both B. and C.

4. Addition of nickel to copper improves its_________________?

   A. Machinability
   B. Ductility
   C. Strength
   D. Hardness

5. Copper is dissolved from its ore by H2SO4 in a percolation tank made of_________________?

   A. Wood
   B. Stainless steel
   C. Reinforced concrete lined with lead
   D. High silicon iron (14% Si)

6. Bronze is an alloy of copper and _________________?

   A. Lead
   B. Tin
   C. Nickel
   D. Zinc

7. Presence of 0.3 to 0.5% arsenic in copper increases its____________________?

   A. Ductility
   B. Malleability
   C. Tenacity & hardness
   D. Electrical conductivity

8. Nickel and copper are the basic constituents of__________________?

   A. Hastelloy
   B. Monel metal
   C. German silver
   D. Inconel

9. Out of the following, copper vessels are the most suitable for the storage of__________________?

   A. Bromine
   B. Dry chlorine & dry fluorine
   C. Nitric acid (95% and fuming)
   D. Phosphoric acid (95%) & sulphuric acid (95% and fuming)

10. An alloy used as thermocouple material comprises of 40% nickel and 60% copper. It is called____________________?

    A. Constantan
    B. Kanthal
    C. Chromel
    D. German silver