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

Q. Viscoelastic behaviour is observed in __________ materials.

View solution

Q. Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles formation, which on rupture cause cavitation

View solution

Q. Which of the following materials has the poorest electrical conductivity ?

View solution

Q. Lead pencil contains

View solution

Q. Function of gear box is to

View solution

Q. Pearlite comprises of

View solution

Q. Which of the following if present in iron ore, enhances its value ?

View solution

Q. As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.

View solution

Q. For a first order chemical reaction, the concentration of the reactant decreases __________ with time.

View solution

Q. Air standard Otto cycle is more efficient than the diesel cycle for the same

View solution

Q. In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases.

View solution

Q. A suitable lubricant used for watches is

View solution

Q. Out of the following __________ iron has the best capability to bear sudden & excessive shocks.

View solution