AP ECET Metallurgical Engineering Paper 2019
| Sr. No. | Question |
| 1 | Valuable mineral particles are liberated from the gangue particles during ______ stage of mineral processing
(a) Comminution (b) Dewatering (c) Concentration (d) Sizing Ans –(a) |
| 2 | Mesh number indicates the number of holes per ______
(a) Linear meter (b) Liner mm (c) Linear cm (d) Linear inch Ans –(d) |
| 3 | The crushing faces in a jaw crusher are made of _______
(a) Aluminium alloy (b) Mild steel (c) Mn steel (d) Bronze Ans – (c) |
| 4 | Which of the following is the mineral of Titanium ?
(a) Sphalerite (b) Barite (c) Galena (d) Rutile Ans – (d) |
| 5 | The product of ______ is more suitable for extraction of metal by hydrometallurgy.
(a) Volatilizing roasting (b) Chlorodizing roasting (c) Oxidizing roasting (d) Sulphating roasting Ans – (d) |
| 6 | Heating of coal in the absence of air is called __________
(a) Gasification (b) Deoxidization (c) Carbonization (d) Coalification Ans – (d) |
| 7 | Proximate analysis of coal is done to determine moisture, ________
(a) Ash, Sulphur and Volatile matter (b) Ash, Fixed carbon and Volatile matter (c) Sulphur, Nitrogen and Fixed carbon (d) Ash, Sulphur and Phosphorus Ans – (b) |
| 8 | Which of the following is called “blue gas”?
(a) Coke oven gas (b) Water gas (c) Natural gas (d) Producer gas Ans – (b) |
| 9 | Which of the following is a neutral refractory?
(a) Silica (b) Dolomite (c) High alumina (d) Chromite Ans –(d) |
| 10 | Differential structural changes in the refractory during its usage causes its distortion which is known as _________
(a) Permeability (b) Cold crushing strength (c) Spalling resistance (d) Warpage Ans – (d)
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| 11 | The law of conservation of energy in thermodynamics is expressed in the form of __________
(a) Zeroth law of thermodynamics (b) First law of thermodynamics (c) Second law of thermodynamics (d) Third law of thermodynamics Ans –(b) |
| 12 | Weight percentage of nitrogen in liquid iron will be directly proportional to __________
(a) Square of the partial pressure of nitrogen gas (b) Square root of the partial pressure of nitrogen gas (c) Partial pressure of the nitrogen gas (d) Activity of the nitrogen gas Ans –(c) |
| 13 | In an adiabatic process which of the following is TRUE?
(a) dE=0 (b) dq=0 (c) dW=0 (d) dG=0 Ans –(b) |
| 14 | Intensive thermodynamic variable are ________
(a) Independent of the number of moles in the system (b) Dependent on the volume of the system (c) Dependent on the mass of the system (d) Independent of the temperature of the system Ans – (a) |
| 15 | At equilibrium spacing in a crystalline solid, which of the following is TRUE for net inter atomic force (F) and internal energy (U)
(a) F is zero and U is zero (b) F is zero and U is minimum (c) F is minimum and U is zero (d) F is minimum and U is minimum Ans – (b) |
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