With increase in porosity, the thermal conductivity of a solid substan – McqOptions

MCQOPTIONS

1.	With increase in porosity, the thermal conductivity of a solid substance
A.	increases
B.	decreases
C.	remains unchanged
D.	may increase or decrease; depends on the solid
Answer» C. remains unchanged

Discussion

No Comment Found

Related MCQs

The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used.
The fluid property, due to which, mercury does not wet the glass is
Laminar flow of a Newtonion fluid ceases to exist, when the Reynolds number exceeds
Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of
The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be
Energy of the sun arises mainly from __________ reactions.
Which of the following fastening devices has a head at one end and a nut fitted to the other ?
Sudden fall of atmospheric pressure by a large amount is an indication of the
Copper deposits are found in India at the following location:
Corrosion of metals can not be prevented by its