Large scale fire on fuel gas line is normally extinguished by

A. Water

B. Steam

C. Foam

D. Nitrogen

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

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  1. Which of the following is resistant to the action of both heat & chemicals?
  2. __________ is the most important element, which controls the physical properties of steel.
  3. Unit of surface tension in S.I. unit is
  4. Current employed in resistance welding ranges from __________ kVA/.
  5. Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid…
  6. Pick out the wrong statement about the machinability of metals. Machinability of a metal
  7. Shampoos are commercially not available in the form of
  8. Case hardening is not done by
  9. For grinding of softer materials, the grinding wheel should have __________ grain size.
  10. Function of fusible plug in a boiler is to
  11. The temperature at which ferromagnetic material can no longer be magnetised by the outside forces, is…
  12. Which of the following is not a charge material for cupola?
  13. Nickel and __________ are the alloying element added in steel to increase its toughness.
  14. The taper provided on pattern for its easy & clean withdrawal from the mould is termed as the __________…
  15. Consideration of the creep is the most important in case of the
  16. In TIG welding, thoriated tungsten electrodes are used, because it
  17. For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship…
  18. In case of a, centrifugal pump, the ratio h1/h2 is termed as the __________ efficiency (where, h1 =…
  19. A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through…
  20. Materials having __________ lattice structure are usually the most ductile.
  21. The following type of bonding is strongly directional in solids.
  22. Maximum change in the hardness of martensite occurs in the carbon content range of __________ percent…
  23. Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal
  24. In the acid Bessemer process, the hot metal should have the following composition.
  25. Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same…
  26. Name the safety device used to protect the boiler, when the water level falls below a minimum level.
  27. Natural water contains approximately __________ percent of heavy water.
  28. Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing…
  29. Out of the following, the most malleable material is
  30. Out of the following __________ iron has the best capability to bear sudden & excessive shocks.