1 BTU/ft3 is approximately equal to _____________ kcal/m3?
1 BTU/ft3 is approximately equal to _____________ kcal/m3?
A. 1
B. 9
C. 4
D. 252
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High porosity refractory bricks have________________?
High porosity refractory bricks have________________?A. Poor resistance to the penetration of molten slag, metal & flue gases
B. Poor heat conductivity & low strength
C. Better thermal spalling resistance
D. All A., B. and C.Osmotic pressure of the solution can be increased by_________________?
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 theseThe most convenient way of expressing solution concentration is in terms of___________________?
The most convenient way of expressing solution concentration is in terms of___________________?A. Mole fraction
B. Normality
C. Molality
D. MolarityKopp’s rule is concerned with the calculation of__________________?
Kopp’s rule is concerned with the calculation of__________________?A. Thermal conductivity
B. Heat capacity
C. Viscosity
D. Surface tensionIf the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will_________________?
If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will_________________?A. Be reduced to 1/4th
B. Increase four times
C. Increase two times
D. None of theseRefractory bricks having lower porosity have _____________________?
Refractory bricks having lower porosity have _____________________?A. High insulating properties
B. Low heat capacity
C. Low thermal conductivity
D. Greater strength