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Which of the following rays has the least wavelength?

A. Ultraviolet rays

B. Infrared rays

C. Cosmic rays

D. X-rays

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. The product (s) of roasting of a sulphide ore is (are)
  2. Which of the following is not the function of a volute casing provided in a centrifugal pump?
  3. Which of the following is not a characteristic observed in material failure by fatigue fracture?
  4. Silicon percentage in silicon steel used for electrical equipments is about
  5. Ammonia leakage in the refrigeration system is detected by
  6. Maximum change in the hardness of martensite occurs in the carbon content range of __________ percent…
  7. Tempering of a material does not improve its
  8. The underground well of a biogas plant is called the
  9. __________ property of steel increases by addition of large amount of silicon in it.
  10. Which of the following is an unconventional source of energy?
  11. The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature…
  12. In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular…
  13. Yield strength of a polycrystalline metal with an average grain size d, is proportional to
  14. If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________…
  15. The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed…
  16. Electrometallurgy is not involved in the extraction of __________ from its ore.
  17. Tumbling is the process of improving the __________ of the materials/parts.
  18. Which of the following materials has the least scrap value?
  19. The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume :…
  20. Which of the following hardness tests does not measure the indentation hardness of metals and alloys?
  21. Catalyst used in the 'catalytic converter' employed in automobile exhaust line for complete combustion/oxidation…
  22. The same volume of all gases is representative of their
  23. Maximum hardenability of steel depends upon its
  24. According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear…
  25. What is the value of entropy at 273°K?
  26. Pick out the correct combination about the role of various additives used in polymers.
  27. Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles…
  28. In the X-ray radiography technique, the tube voltage for thicker plates as compared to thin plates,…
  29. Milk is fat dispersed in water. It is an example of
  30. Main constituent of bone ash is