1. The following type of bonding is strongly directional in solids.
2. Pick out the wrong statement. Termination of polymerisation reaction occurs, if the
3. A thin, flat & square plate measuring 2 m x 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m2 . The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is __________ W/m2 °C.
4. The maximum value, which the residual stress in a material can reach is the __________ of the material.
5. Which of the following is capable of acting both as an acid flux as well as a basic flux in the metal extraction from its ore ?
6. Which is the most suitable joint for the pipes, with are laid submerged under water, where the bottom of the river bed is uneven ?
7. Floating control action
8. Boiler rating is normally done in terms of
9. The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)
10. Number of electrons in the outermost orbit of a semi-conductor is
11. The condition of diffraction from a crystal is given by
12. Galena is an ore of
13. A reduction process is accompanied with increase in the
14. Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.
15. First empirical temperature scale conceived is the __________ temperature scale.
16. In continuous casting of liquid steel, the mould is made of
17. Diamond does not conduct electricity, because
18. __________ can not be forged.
19. Material having maximum density is
20. Which of the following is not found in iron-carbon equilibrium diagram ?
21. Which of the following metals can not be extracted by pyrometallurgical process from its sulphide ore?
22. Nitrogen compounds are not used in the manufacture of