Window panes of aeroplanes are normally made of

A. Perspex (PMMA)

B. Teflon (PTFE)

C. Bakelite (phenol formaldehyde)

D. Polystyrene

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

You can do it
  1. Austempering process results in the formation of __________ structure.
  2. The difference between gross & net calorific values of fuel is due to the
  3. As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint…
  4. Shaft/rotor speed is most accurately measured by a
  5. Super conduction in metals is observed at a temperature of __________ °K.
  6. In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb…
  7. Increasing the carbon content of steel
  8. Energy of the sun arises mainly from __________ reactions.
  9. About __________ ton of coke is required in a cupola to produce one ton of casting.
  10. The hardenability of steel decreases with
  11. Lead is added to 60:40 brass primarily to improve
  12. Which of the following is prone to cup and cone fracture?
  13. The most important consideration in value engineering is the
  14. Which of the following approaches the ideal gas behaviour most closely?
  15. Plants produce carbohydrates from the CO2 present in the atmosphere by
  16. Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by
  17. Runge-Kutta method is used to solve a/an
  18. Chlorine acts as a bleaching agent only in the presence of
  19. Pick out the correct statement about the condensation.
  20. Rain drops falling through atmospheric air attain limited terminal velocity, because of
  21. With increase in temperature, the electrical conductivity of a __________ decreases.
  22. Load cells used for the measurement of weight has
  23. Which of the following alloying elements is present in maximum percentage in high speed steel?
  24. Basicity of the slag in Indian blast furnace is in the range of
  25. Shampoos are commercially not available in the form of
  26. Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed…
  27. __________ is a special constituent of chlorophyll without which photosynthesis is not possible.
  28. The activity co-efficient of the solute in a dilute solution
  29. Compressed dry air is used as the cutting fluid, while machining
  30. Which one is neutral in character?