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

Related Mcqs:

1. Particle nature of cathode rays is proved due to the fact that they ________________?

   A. Travel in a straight line
   B. Get deflected by magnetic electric field
   C. Produce fluorescence
   D. Heat the exposed material

2. Corrosion rate cannot be lowered by reducing the ________________ of the corroding medium?

   A. Concentration
   B. Velocity
   C. Temperature
   D. None of these

3. When the wavelength of incident X-rays increases, the angle of diffraction__________________?

   A. Decreases
   B. Increases
   C. Remain constant
   D. Shows no systematic variation

4. Which of the following rays has the least wavelength ?

   A. Ultraviolet rays
   B. Infrared rays
   C. Cosmic rays
   D. X-rays

5. X-rays are__________________?

   A. Positively charged
   B. Negatively charged
   C. Neutral
   D. Of higher wavelength than visible light

6. Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of _______________ gms of zinc per m2 of steel strip ?

   A. 5-10
   B. 1000-1500
   C. 120-500
   D. 1500-3000

7. The swift cup test evaluates the following property of a sheet metal ?

   A. Stretchability
   B. Drawability
   C. Bendability
   D. None of these

8. Resistance of an electrical conductor is proportional to its (where, l = length and A = crosssectional area of the conductor)________________?

   A. A
   B. l
   C. A2
   D. Both A. & B.

9. In multipass welds, shot peening is done after each pass to__________________?

   A. Close the surface porosity
   B. Break the continuity of columnar grains
   C. Flatten the weldment
   D. Introduce texture in the weld

10. Vernier calipers cannot be used to measure the______________________?

    A. I.D. & O.D. of the shaft
    B. Thickness of parts
    C. Depth of holes
    D. Clearance between two mating surfaces