Description : Any substance above its critical temperature exists as (A) Saturated vapour (B) Solid (C) Gas (D) Liquid
Last Answer : (C) Gas
Description : Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of (A) Lumps (B) Pellets (C) Briquettes (D) Sinte
Last Answer : Option B
Description : In a 100 TPD Sponge Iron plant, the sponge iron is fed to the Induction melting furnace, producing molten steel at 88% yield. The Energy consumption details are as follows: Coal Consumption : 130 ... molten steel (product). 3. Total Energy Consumption of Plant in Tons of Oil Equivalent (TOE )
Last Answer : a) Specific Energy Consumption of Induction Melting Furnace Molten Steel Production from the Induction melting furnace per day = 100 x 88/100 = 88 TPD Total Energy Consumption of the Plant = 82400 kWh ... mark c) Total Energy consumption of Plant in ToE = 655864000/107 = 65.586 ToE
Description : How can you tell when a solid and liquid solution is saturated?
Last Answer : It is not possible to dissolve another amount of solute, at a given temperature and pressure.
Description : In distillation, overhead product contains (A) Only one component (B) Two components (C) Any number of components (D) Only saturated liquid
Last Answer : (C) Any number of components
Description : Commercial bath sponge is called
Last Answer : Commercial bath sponge is called A. Euspongia B. Spongilla C. Euplectella D. Cliona
Description : Pick out the wrong statement. (A) Dehydration of ammonium carbamate to produce urea is endothermic (B) Direct use of liquid ammonia as a fertiliser for a tropical country like India ... manufacture of ortho-phosphoric acid (D) Phosphate rock when reacted with dilute H2SO4 produces superphosphate
Last Answer : (B) Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable
Description : Pick out the wrong statement. (A) Gape is the greatest distance between the crushing surfaces or the jaws (B) The angle of nip (2α) is the angle between roll faces at the level where they will ... Reduction ratio is the ratio of the maximum size of the particles in the feed to that in the product
Last Answer : (C) Crushing efficiency is the ratio of the energy absorbed by the solid to the surfaces energy created by crushing
Description : A decrease in water content results in a reduction of the volume of a soil in (A) Liquid state (B) Plastic state (C) Semi solid state (D) All of these
Last Answer : (D) All of these
Description : Direct relation between…….. &………of saturated steam, the amount of energy input to process easy to control. a) volume, pressure b) volume, temperature c) temperature, pressure d) None of above
Last Answer : c) temperature, pressure
Description : Electrolytic reduction cell used for conversion of calcined Al2O3to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to (A) Achieve very high ... by the generation of heat (C) Electrolytically dissociate alumina (D) Both (B) & (C)
Last Answer : (D) Both (B) & (C)
Description : At which temperature direct reduction of Fe2O3 by carbon is possible ?
Last Answer : Ans. Above 1123 K, carbon can reduce Fe2O3
Description : Petroleum coke is used mainly in the (A) Discoloration of yellow glycerine (B) Sugar refining (C) Manufacture of carbon electrode (D) Blast furnace for reduction of iron ore
Last Answer : (C) Manufacture of carbon electrode
Description : Maximum use of petroleum coke is in (A) Adsorption refining operation (B) Fuel gas manufacture (C) Carbon electrode manufacture (D) Iron ore reduction
Last Answer : (C) Carbon electrode manufacture
Description : India's forest sponge iron plant is at (a) Kothagudam (b) Kurnool (c) Cuddappah (d) Kavaratti
Last Answer : Ans: (a)
Description : The sulphur in sulphur sodium battery is absorbed by___ sponge. • Sodium • Carbon • Wire • Cellulose
Last Answer : • Carbon
Description : What is defined as the direct conversion of a substance from the solid to the vapor state or vice versa without passing the liquid state? A. Condensation B. Vaporization C. Sublimation D. Cryogenation
Last Answer : Sublimation
Description : The process of converting liquid oil into solids saturated fats by passing hydrogen gas is
Last Answer : called hydrogenation.
Description : Density in the solid state is slightly less than that in its liquid state, in case of (A) Carbon dioxide (B) Water (C) Mercury (D) None of these
Last Answer : (B) Water
Description : Which of the following finds the least commercial use? (A) Pure iron (B) High silicon iron (C) Low carbon steel (D) High carbon steel
Last Answer : (A) Pure iron
Description : Which of the following metals is NOT obtained by reduction using carbon? (1) Copper (2) Sodium (3) Iron (4) Zinc
Last Answer : (2) Sodium Explanation: Metals such as zinc, iron and copper are present in ores as their oxides. Each of these oxides is heated with carbon to obtain the metal.
Description : __________ is the temperature at which a gas-vapor mixture becomes saturated, when cooled at constant total pressure out of contact with a liquid. (A) Dew point (B) Bubble point (C) Dry bulb temperature (D) Wet bulb temperature
Last Answer : (A) Dew point
Description : In saturated gas, the (A) Vapour is in equilibrium with the liquid at the gas temperature (B) Vapour is in equilibrium with the liquid at the room temperature (C) Partial pressure of vapour equals the vapour pressure of the liquid at room temperature (D) None of these
Last Answer : (A) Vapour is in equilibrium with the liquid at the gas temperature
Description : When the feed to a distillation column is a saturated liquid, slope of thefeed line is (A) Zero (B) Unity (C) Infinity (D) None of these
Last Answer : (C) Infinity
Description : In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because (A) Temperature is less (B) Total pressure is less (C) Mixing of steam ... not so intimate as to result in equilibrium condition (D) Saturated steam is used for steam distillation
Last Answer : (C) Mixing of steam with the material being vaporised is not so intimate as to result in equilibrium condition
Description : Pick out the wrong statement. (A) In the McCabe-Thiele diagram for binary distillation, vertical feed line represents saturated liquid feed and horizontal feed line represents saturated vapour feed (B) In ... layers over a flat plate are of equal thickness, if Schmidt number is equal to unity
Last Answer : (C) For Laminar flow over a plate of length L, the local mass transfer coefficient at a distance L from the leading edge is 1.5 × 10 -2m/s. Then the average mass transfer co-efficient for the plate is 2 × 10 -2m/s
Description : On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in (A) Greater degree of separation with a fixed number of trays (B) Increased reboiler load
Last Answer : (C) Increased reflux ratio
Description : The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will (A) Increase (B) Decrease (C) Remain same (D) Depend on saturated boiling point; may increase or decrease
Last Answer : (A) Increase
Description : At the boiling point of the liquid at the prevailing pressure, the saturated absolute humidity becomes (A) 1 (B) 0 (C) ∞ (D) None of these
Last Answer : (C) ∞
Description : In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed (A) q > 1 (B) q < 1 (C) q = 1 (D) q = 0
Last Answer : (C) q = 1
Description : Leidenfrost point is a term concerned with the (A) Condensation of the saturated vapor on a cold surface (B) Concentration of a corrosive solution by evaporation (C) Heat transfer between two highly viscous liquids (D) Boiling of a liquid on a hot surface
Last Answer : (D) Boiling of a liquid on a hot surface
Description : In case of __________ boiling, the liquid temperature is below the saturation temperature and the boiling takes place in the vicinity of the heated surface. (A) Nucleate (B) Local (C) Pool (D) Saturated
Last Answer : (B) Local
Description : Which of the following situations can be approximated to a steady state heat transfer system? (A) A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmospheric air at ... flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C
Last Answer : (B) 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C
Description : A liquid under pressure greater than its vapour pressure for the temperature involved is called a __________ liquid. (A) Sub-cooled (B) Saturated (C) Non-solidifiable (D) None of these
Last Answer : (A) Sub-cooled
Description : Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg. K, entropy of saturated vapour = 7.2234 ... vapour with quality of 0.9 (C) Saturated vapour (D) Partially condensed vapour with quality of 0.1
Last Answer : (A) Superheated vapour
Description : Why solid NaCl starts separating out from a saturated solution of NaCl if HCl gas is passed through it?
Last Answer : Ans. HCl in the solution provides Clions. This increases the ionic product in NaCl and so the solid NaCl starts separating out.
Description : For testing a saturated clay for shear strength, the test recommended, is (A) Direct shear test (B) Triaxial compression test (C) Unconfined compression test (D) All the above
Last Answer : Answer: Option C
Description : The temperature and pressure in saturated stem has__________relationship a) Direct b) indirect c) Neither of above d) both a and b
Last Answer : b) indirect
Description : A saturated clay is to be tested for shearing strength. Which test should be recommended? a) Direct shear test b) Triaxial shear test c) Vane shear test d) Unconfined compression*
Last Answer : d) Unconfined compression*
Description : What process causes the mass of the drying sponge to change?
Last Answer : Evaporation
Description : The substance which does not expand on going from liquid state to solid state is – (1) Water (2) Cast-iron (3) Aluminium (4) Type metal
Last Answer : (4) Type metal Explanation: In printing, type metal (sometimes called hot metal) refers to the metal alloys used in traditional type founding and hot metal typesetting. Lead is the main constituent of ... and solidifies in a simple manner at a specific temperature. This is not the case with alloys.
Description : The substance which does not expand on going from liquid state to solid state is (1) Water (2) Cast-iron (3) Aluminium(4) Type metal
Last Answer : Type metal
Description : Dry ice is ------? A. Methane hydrate B. Liquid Nitrogen C. Solid Carbon dioxide (Answer) D. Frozen Water E. None of these
Last Answer : C. Solid Carbon dioxide (Answer)
Description : Separation of solid suspended in liquid into a supernatant clear liquid and a denser slurry employs a process termed as the (A) Coagulation (B) Flocculation (C) Sedimentation (D) Clarification
Last Answer : (C) Sedimentation
Description : Stage efficiency in a leaching process depends on the (A) Time of contact between the solid and the solution (B) Rate of diffusion of the solute through the solid and into the liquid (C) Both (A) and (B) (D) Vapour pressure of the solution
Last Answer : (C) Both (A) and (B)
Description : In the context of the chemical process industries, the term BOD is normally associated with the (A) Characterisation of solid wastes (B) Organic concentration in gaseous effluents (C) Characterisation of liquid effluents (D) Characterisation of boiler feed water
Last Answer : (C) Characterisation of liquid effluents
Description : _________ process is meant for direct hydrogenation of coal to produce liquid fuel. (A) Fischer-Tropsch (B) Bergius (C) Lurgi (D) None of these
Last Answer : (B) Bergius
Description : Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction? (A) Oxidation of Na + ions (B) Oxidation of Cl - ions (C) Reduction of Na + ions (D) Reduction of Cl - ions
Last Answer : (B) Oxidation of Cl - ions
Description : or efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be (A) 100% indirect reduction (B) 100% direct reduction (C) 50-60% indirect reduction (D) 30-40% indirect reduction
Last Answer : (C) 50-60% indirect reduction