Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA)?

A. Styrofoam

B. Lucite

C. Perspex

D. Plexiglass

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

You can do it
  1. Laser welding is widely employed in the __________ industries.
  2. The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a…
  3. Minimum number of members required to form a Public Limited Joint Stock Com-pany is
  4. Tumbling is the process of improving the __________ of the materials/parts.
  5. Most of the phosphorous present in the blast furnace burden enters into
  6. Density in the solid state is slightly less than that in its liquid state, in case of
  7. Ganister contains maximum percentage of
  8. An abrupt and sudden fall in the reading of barometer is an indication of the
  9. Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the
  10. Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be…
  11. Surface tension of a liquid
  12. If the head is doubled in & centrifugal pump, the power required will increase in the ratio of
  13. __________ can replace tungsten in high speed steel.
  14. Pick out the wrong statement about nucleate boiling.
  15. Which of the following is a boiler accessory i.e., not a boiler mounting?
  16. Rain drops falling through atmospheric air attain limited terminal velocity, because of
  17. For an ideal gas, Cp - Cv is
  18. Boiler draught of 10 mm water column is equivalent to
  19. The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________…
  20. LVDT used for displacement measurement is a/an __________ transducer.
  21. Thermodynamic cycle involved in the working of a thermal power plant is the __________ cycle.
  22. Fog is an example of colloidal system of
  23. A material is capable of resisting softening at high temperature, because of its property termed as
  24. Thermistors are used in __________ devices.
  25. What is the percentage of chromium in 18-4-1 high speed steel?
  26. Pick out the wrong statement.
  27. On being hit with a hammer, __________ will readily fracture.
  28. __________ number determines whether the fluid flow in an open channel is supercritical, critical or…
  29. Coating provided on the electrodes used in the arc welding is not expected to
  30. Pick out the correct statement