The vapor pressure of liquids (having similar chemical nature) at any specified temperature ______________ with increasing molecular weight?

A. Increases
B. Decreases
C. Remains unchanged
D. Increases linearly

Permeability of bricks is a measure of the___________________?

A. Refractoriness
B. Melting point
C. Rate at which a fluid will pass through the pores
D. Expansion during heating

1 BTU/ft3 is approximately equal to _____________ kcal/m3?

A. 1
B. 9
C. 4
D. 252

Pick out the wrong unit conversion of thermal conductivity ?

A. 1 BTU/ft2.hr.°F/ft = 1.488 kcal/m2. hr.°C/m
B. 1 BTU/ft2.hr.°F/inch = 1.488 kcal/m2. hr.°C/m
C. 1 kcal/m.hr.°C = 0.672 BTU/ft.hr.°F = 1.163 W/m. °K
D. 1 W/cm.°C = 85.985 kcal/m.hr.°C = 57.779 BTU/ft.hr.°F

Osmotic pressure of the solution can be increased by_________________?

A. Decreasing its temperature
B. Increasing the volume of the vessel containing the solution
C. Diluting the solution
D. None of these

Fireclay bricks are used in the______________?

A. Coke ovens regenerator
B. Outer lining of L.D. converter
C. Hearth bottom of blast furnace
D. Coke oven walls

One mole of methane undergoes complete combustion in a stoichiometric amount of air. The reaction proceeds as CH4 + 2O2 → CO2 + 2H2O. Both the reactants and products are in gas phase. ΔH°298 = – 730 kJ/mole of methane. Mole fraction of water vapour in the product gases is about_____________________?

A. 0.19
B. 0.33
C. 0.40
D. 0.67

In panel test for spalling resistance, the average face temperature of panel assembly is maintained at _____________ °C for 24 hours?

A. 700
B. 1000
C. 1600
D. 2000