Q. What is the percentage of chromium in 18-4-1 high speed steel ?

View solution

Q. Preheating before welding is done to

View solution

Q. Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

View solution

Q. Dew point temperature always gives an indication of the __________ of the moist air.

View solution

Q. Hot extrusion of aluminium is done in the temperature range of __________ °C.

View solution

Q. Stellite is a __________ material.

View solution

Q. Percentage of argon (by volume) in dry atmospheric air is about

View solution

Q. An abrupt and sudden fall in the readinp of barometer is an indication of the

View solution

Q. Steam condenser tubes are made of ad-mirability brass, in which percentage of zinc & copper are __________ respectively.

View solution

Q. Dislocation cross-slip is difficult in those materials, which have

View solution

Q. Shrinkage allowance on pattern is provided to compensate for shrinkage when the

View solution

Q. Spark plug is provided in a/an

View solution

Q. Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as

View solution

Q. For the irreversible reaction, Ca+ 2C = CaC₂ , Δ H°298 = - 60000 J . mole⁻¹ . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be

View solution

Q. Projection welding & stud welding is categorised as the __________ welding.

View solution

Q. The driving force for the sintering of a powder compact is

View solution

Q. The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a boiler.

View solution

Q. Volumetric composition of flue gas analysed with the Orsat apparatus is : CO₂ = 12%, O₂ = 8%, CO = nil, N₂ = 80%. This flue gas composition indicates that

View solution

Q. Coating provided on the electrodes used in the arc welding is not expected to

View solution

Q. Desalination of water

View solution