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Wave length of X-rays is about 1 angstrom; however it cannot pass through a sheet of

A. Paper

B. Cloth

C. Lead

D. Aluminium

Correct Answer : C.


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  3. Addition of silicon to cast iron
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  9. 'Amortization' in respect of financial obligation of a company means the
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  11. Minimum safe distance between two liquid fuel storage tanks is equal to (where, H = height of the tank)
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  16. There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.
  17. The concentration of (H+) ions is 4 x 10-5 in a solution. Then pH of the solution will be (Given log…
  18. __________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in…
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  22. Hot working of lead is carried out at
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  24. Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________…
  25. The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/cm2.
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