$(1$ point$)$ In transient heat conduction, any decrease in thermal time constant will cause a solid to to changes in its temperature

A$.$ Respond more Rapidly

B$.$ Respond more Slowly

C$.$ Remains constant

D$.$ Not enough infornation

$(1$ point$)$ The Biot number is defined as

A$.$ The ratio of external convection resistance $($fluid$)$ to the internal conduction resistance $($solid material$)$

B$.$ The ratio of convention resistance $($fluid$)$ to the conduction resistance $($fluid$)$

C$.$ The ratio of the internal conduction resistance $($solid material$)$ to external convection resistance $($fluid$)$

D$.$ None of these

$(1$ point$)$ In the lumped system parameter model, the variation of temperature with time is

A$.$ Linear

B$.$ Exponential

C$.$ Sinusoidal

D$.$ Cube

$($I point$)$ The value of Biot number is very small, which means

A$.$ The convective resistance of fuid is negligible

B$.$ The conductive resistance of the fluid is negligible

$(1$ point$)$ Steady temperature profile in a one$-$dimensional plane wall