Long-sight defect could be corrected by using ____ lens:
a) concave
b) convex
c) diverging
d) none of these (more…)
Very High Frequency (VHF) have _____ wavelengths:
a) shorter
b) shortest
c) longer
d) longest (more…)
Which of the following will you use to remove rust stains on cloth?
a) Kerosene oil
b) Oxalic Acid Solution
c) Alcohol
d) None of these (more…)
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