MCQs: Thermal diffusivity of a refractory brick is high, when its ______________ is high?
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MCQs: With increase in the alumina content, the refractoriness of high alumina refractories_________________?
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MCQs: Test piece for determination of RUL of a refractory is heated in a/an__________________?
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MCQs: An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture ?
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MCQs: Magnesite refractories are used for the construction of those furnaces, which are_______________?
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MCQs: Outer combustion chamber of blast furnace stove is lined with _______________ bricks?
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MCQs: Roof of a basic electric furnace is made of ______________ bricks?
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MCQs: Which property of refractories is the most important for top section of the blast furnace ?
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MCQs: Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of ______________ °C?
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MCQs: In the reaction, Ca + 2H2O = Ca(OH)2 + H2; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water ? (Atomic weight of calcium = 40) ?
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MCQs: Dissolving a solute in a solvent does not change its________________?
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MCQs: ‘Cox’ chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the_____________?
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MCQs: The number of water molecules present in a drop of water weighing 0.018 gm is 6.023 × __________?
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MCQs: The amount of Zn (atomic weight = 65) required to form 224 c.c. of H2 at N.T.P. on treatment with dilute H2SO4will be _____________ gm?
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MCQs: A vapor that exists above its critical temperature is termed as a _____________ vapor?
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MCQs: Pick out the wrong unit conversion of temperature?
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MCQs: Viscosity of 1 centipoise is equal to 1 Centistoke in case of________________?
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MCQs: The heats of vaporisation of CS2, C2H5OH &H2O are 26.8, 38.6 & 40.6 KJ/kg.mole respectively. The order of decreasing inter-molecular forces in these liquids is________________?
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MCQs: The gravimetric (i.e., by weight) composition of a vapor saturated gas is independent of the_______________?
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MCQs: Heat of ____________ of a fuel is called its calorific value?
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