Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxyacetylene welding is __________ Nm3.
0.5
1
1/3
2.5
- The leaching solvent used in Baeyer's process for the purification of bauxite is
- Fibre reinforced plastic (FRP) are
- Propulsion of rocket follows from the
- Unbreakable crockeries are made from __________ polymers.
- Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of Portland cement.…
- In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular…
- Steel is welded using the __________ flame.
- Cold heading or upsetting is categorised as the __________ process.
- Gas turbine normally employs a constant __________ cycle.
- With decrease in the grain size of a material, its creep resistance
- Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare…
- Sand used to stop the green sand from sticking to the pattern is termed as the __________ sand.
- Load cells used for the measurement of weight has
- Encyclopaedia of Chemical Technology has been
- Which of the following materials has the least scrap value?
- Which of the following phenomenon will exhibit the minimum heat transfer?
- __________ is the trade name assigned to a nonferrous cast alloy composed of cobalt, chromium & tungsten.
- Maximum hardenability of steel depends upon its
- In the acid Bessemer process, the hot metal should have the following composition.
- Pick out the wrong statement.
- Dies for wire drawing are generally made of
- Presence of nickel & chromium in steel does not raise its
- The mechanism involved in the removal of metal in drilling operation is by
- The following type of bonding is strongly directional in solids.
- Lead is poured into the joint between two __________ pipes.
- The excess air required for the combustion of pulverised coal is of the order of about __________ percent.
- Wave length of X-rays is about 1 angstrom; however it cannot pass through a sheet of
- Oxyacetylene reducing flame is used while carrying out welding on
- The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.
- The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong