15307. The machanism involved in the removal of metal in drilling operation is by
15308. Thermal conductivity of a material does not depend upon its
15309. Carbon supply in pack carburising process is in the form of
15310. Water hammer is caused in steam carrying pipelines, because of
15311. Powder metallurgy is used to produce
15312. Catalyst used in the catalytic converter employed in automobiles to convert CO into CO and for complete oxidation of un-burnt hydrocarbons is
15313. For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship similar to that expressed by the pressure volume plot ?
15314. The main constituent of bones is
15315. Globular form of cementite is formed during the __________ process.
15316. Faraday's law of electrolysis is related to the
15317. The two elements required to form substitutional solid solution should not have
15318. Rankine cycle comprises of two isothermal and two __________ processes.
15319. Coating provided on the electrodes used in the arc welding is not expected to
15320. Desalination of water
15321. Viscoelastic behaviour is observed in __________ materials.
15322. Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles formation, which on rupture cause cavitation
15323. Which of the following materials has the poorest electrical conductivity ?
15324. Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is
15325. What is the percentage of chromium in 18-4-1 high speed steel ?
15326. Preheating before welding is done to
15327. Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)
15328. Dew point temperature always gives an indication of the __________ of the moist air.
15329. For a first order chemical reaction, the concentration of the reactant decreases __________ with time.
15330. Air standard Otto cycle is more efficient than the diesel cycle for the same
15331. In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases.
15332. A suitable lubricant used for watches is
15333. Out of the following __________ iron has the best capability to bear sudden & excessive shocks.
15334. For the irreversible reaction, Ca+ 2C = Ca C2 , 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
15335. Projection welding & stud welding is categorised as the __________ welding.
15336. The driving force for the sintering of a powder compact is
15337. The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a boiler.
15338. 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
15339. A fluid is termed as the Newtonion fluid, when the shear stress is __________ the velocity gradient.
15340. Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the
15341. When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively
15342. Limestone addition in the blast furnace is done to flux __________ present in the raw materials.
15343. The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.
15344. The burnout heat flux in the nucleate boiling regime is not a function of the
15345. The approximate height of a blast furnace having a useful volume of 2000 m3 is about __________ metres
15346. The cathode in an electrochemical cell always carries
15347. An oxidation process is accompanied with decrease in the
15348. Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel & copper having relatively higher melting points. Which of the following is not a hot dipping process ?
15349. Hot extrusion of aluminium is done in the temperature range of __________ °C.