A. Are exemplified by Na, K and Li
B. Do not resist corrosion very strongly
C. Are the lowermost in the electro-chemical series of metals
D. None of these
Related Mcqs:
- Oxide layer formed on the non-ferrous metal surface after its annealing is__________________?
A. Removed by acid pickling
B. Hammered into the surface
C. Removed with coarse emery cloth
D. Left as such to protect the surface - The rolling process cannot be used to produce______________________?
A. Plates
B. Rods
C. Tubes
D. Wires - Carbon is present in the form of _______________________ in grey cast iron ?
A. Spheroids
B. Nodular aggregates of graphite
C. Flakes
D. Cementite - ________________ is a special constituent of chlorophyll without which photosynthesis is not possible ?
A. Calcium
B. Nitrogen
C. Phosphorous
D. Hydrogen - Which of the following equipments is used for liquid dispersion ?
A. Packed column
B. Venturi scrubber
C. Bubble cap plate column
D. Wetted wall column - __________________ stress cannot be sustained by a fluid in equilibrium ?
A. Shear
B. Tensile
C. Compressive
D. None of these - _____________________ of grey cast iron produces white cast iron?
A. Tempering
B. Rapid heating
C. Rapid cooling
D. Slow cooling - The difference between gross & net calorific values of fuel is due to the___________________?
A. Sensible heat carried away by the flue gases
B. Heat carried away by the steam from the moisture content of the fuel
C. Heat lost by radiation
D. Heat carried away by steam from the combustion of hydrogen in the fuel - The usual energy consumption in electric arc furnace steel making is _____________ KWh/ton of steel ?
A. 60 – 100
B. 400 – 700
C. 1200 -1500
D. 2000 – 2300 - Metalloids________________?
A. Are good conductor of heat & electricity
B. Act as electron donors with metals & as electron acceptor with non-metals
C. Are not necessarily solids at room temperature
D. Are compounds that exhibit both metallic & non-metallic properties to some extent and are
exemplified by elements like germanium, silicon & boron
