Fire in fuel gas pipelines is extinguished most effectively by
Spraying water
Blanketting the area with nitrogen atmosphere
Fire fighting foam
None of these
- Brinell Hardness Number (BHN) for talc is approximately in the range of
- __________ is the process used for setting up compressive stresses in the surface of a metal to improve…
- The concentration of (H+) ions is 4 x 10-5 in a solution. Then pH of the solution will be (Given log…
- Normalising does not __________ of a metal.
- Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e.…
- Powder metallurgy technique is used in the production of __________ tools.
- The bolt is subjected to __________ when the nut is tightened by putting the washer beneath it.
- Principal alloying element in Elinvar (used for making hair springs for watches) is
- Fatigue limit improvement by over stressing the metal by successively increasing the load is called…
- __________ fluid force is not considered in the Navier-Stokes equation.
- Most of the phosphorous present in the blast furnace burden enters into
- Fog is an example of colloidal system of
- The phenomenon occurring during explosion of a hydrogen bomb is
- Which of the following is not a principal alloying element for the structural steel?
- The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.
- Fahrenheit and Centigrade scales have the same readings at
- Pick out the wrong statement.
- __________ can replace tungsten in high speed steel.
- Dislocations are __________ defects.
- Cold working of a material results in increase in hardness, which is termed as the __________ hardening.
- Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing…
- Induced draft fans provided in large thermal power plant boilers have __________ blades.
- The pressure outside a bubble/droplet of liquid is __________ the internal pressure.
- Function of fusible plug in a boiler is to
- Nitriding of a steel part does not increase its
- If the head is doubled in & centrifugal pump, the power required will increase in the ratio of
- Holes for riveting purposes should be preferably made by
- In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just…
- Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts…
- The following type of bonding is strongly directional in solids.