A. Oxygen
B. Arsenic
C. Antimony
D. Bismuth
Related Mcqs:
- Dies for wire drawing are generally made of__________________?
A. Mild steel
B. Stainless steel
C. Carbides
D. High carbon steel - In hot wire anemometer used for gas flow measurement, the wire is normally made of ______________________?
A. Copper
B. Platinum
C. Constantan
D. Chromium - 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. - Presence of 0.3 to 0.5% arsenic in copper increases its____________________?
A. Ductility
B. Malleability
C. Tenacity & hardness
D. Electrical conductivity - German silver is an alloy of copper, nickel and________________?
A. Zinc
B. Silver
C. Tin
D. Lead - Most common stainless steel type 316, which is highly resistant to corrosion contains______________?
A. 16-13% Cr 10-14% Ni and 2-3% Mo
B. 20-22% Cr, and 8-10% Ni
C. 2-4% Cr, 22% NI and 2-4% Mo
D. None of these - Bronze is an alloy of copper and _________________?
A. Lead
B. Tin
C. Nickel
D. Zinc - 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) - 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 - Zinc is highly ______________ at room temperature?
A. Ductile
B. Resistant to atmospheric corrosion
C. Malleable
D. Brittle
